Image credits · ⁨이미지 출처⁩

Diagrams in our handouts are drawn by us and need no credit. The images below are reused from the web under licences that permit it — each is listed with its author, licence and source. · ⁨출처 자료의 도표는 당사가 직접绘制했으며 출처 표기가 필요 없습니다. 아래 이미지는许可하는 라이선스 하에 웹에서 재사용된 것으로, 각 이미지마다 저자, 라이선스 및 출처가 명시되어 있습니다.⁩

← Know · ⁨알고 있음⁩

A-Level Biology · ⁨A-Level 생물학⁩

01 · Cell structure

Animal cell structure

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨출처⁩
Plant cell structure

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨출처⁩
Average prokaryote cell

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨출처⁩
Enterobacteria phage T2 transmission electron micrograph

SnaxMikn · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Biological molecules

Benedict's test for Sugars

Thebiologyprimer · CC0 · Source · ⁨출처⁩
Kartoffel-Stärkekörner

Quant8 · CC BY-SA 4.0 · Source · ⁨출처⁩
1GZX Haemoglobin

Zephyris at English Wikipedia · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Enzymes

Plastic spoon n Laundry detergent n Washing powder in white

Lebacno · CC BY-SA 3.0 · Source · ⁨출처⁩
yeast

David Blaikie · CC BY 2.0 · Source · ⁨출처⁩

04 · Cell membranes and transport

SEM blood cells

Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source · ⁨출처⁩
Demonstration of osmosis using a potato osmometer

Knowledge genome · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · The mitotic cell cycle

Onion skin mitosis (20x)

UAF Center for Distance Education · CC BY 2.0 · Source · ⁨출처⁩
Mitosis in Onion Root various stages (Metaphase)

Natalierussell77 · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Nucleic acids and protein synthesis

Space-filling model of the DNA double helix

Ude · Public domain · Source · ⁨출처⁩
DNA Extraction

Joo Nath · CC BY-SA 4.0 · Source · ⁨출처⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨출처⁩

07 · Transport in plants

Vascular bundle in a young sunflower stem

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨출처⁩
Growth Rings tree rings 01

Vijayanrajapuram · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Transport in mammals

Diagram of the human heart

Wapcaplet (Eric Pierce) · CC BY-SA 3.0 · Source · ⁨출처⁩
Human blood smear

Keith Chambers · CC BY-SA 3.0 · Source · ⁨출처⁩

09 · Gas exchange

Normal lung tissue

Yale Rosen from USA · CC BY-SA 2.0 · Source · ⁨출처⁩
Human Lungs (NIH BioArt 231 - 630892)

Courtesy of NIAID Ryan Kissinger · Public domain · Source · ⁨출처⁩

10 · Infectious diseases

Acid-fast bacilli of Mycobacterium tuberculosis

Ajay Kumar Chaurasiya · CC0 1.0 · Source · ⁨출처⁩
Plasmodium falciparum parasite in blood

MichaelZahniser · Public domain · Source · ⁨출처⁩
Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨출처⁩

11 · Immunity

A neutrophil engulfing bacteria

Volker Brinkmann (NIAID) · CC BY-SA 3.0 · Source · ⁨출처⁩
Normal Adult Blood Smear

Keith Chambers · CC BY-SA 3.0 · Source · ⁨출처⁩
Urine Pregnancy Test -Positive

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩
Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨출처⁩

12 · Energy and respiration

800metresOlympicTrials2020

jenaragon94 · CC BY 2.0 · Source · ⁨출처⁩
Mitochondria, mammalian lung - TEM

Louisa Howard · Public domain · Source · ⁨출처⁩
Monocot Root Aerenchyma in Acorus (35399382813)

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨출처⁩

13 · Photosynthesis

Green leaves (7914624332)

Moyan Brenn from Italy · CC BY 2.0 · Source · ⁨출처⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨출처⁩

14 · Homeostasis

(20250417) Blood glucose meter 04

Roy Zuo · CC BY-SA 4.0 · Source · ⁨출처⁩
Sweating for stunning scenery 130719-Z-NO327-280

Spc. Tyler Meister · Public domain · Source · ⁨출처⁩

15 · Control and coordination

Stained neurones under the microscope

Tulemo · CC BY-SA 4.0 · Source · ⁨출처⁩
Computed tomography of human brain - large

Department of Radiology, Uppsala University Hospital. Uploaded by Mikael Häggström · CC0 · Source · ⁨출처⁩
Venus Flytrap showing trigger hairs

Noah Elhardt · CC BY-SA 2.5 · Source · ⁨출처⁩
Human skeletal muscle tissue 1 - TEM

Louisa Howard · Public domain · Source · ⁨출처⁩

16 · Inheritance

Human karyotype

National Cancer Institute · Public domain · Source · ⁨출처⁩
Human Egg (2722043681)

Ed Uthman from Houston, TX, USA · CC BY 2.0 · Source · ⁨출처⁩

17 · Selection and evolution

Hardy-Weinberg formula card

eXercise project · CC0 · Source · ⁨출처⁩
Peppered moth forms

Martinowksy at Dutch Wikipedia (Original text: Maarten Sanne) · CC BY-SA 3.0 · Source · ⁨출처⁩
Cepaea nemoralis pair banded shells

· CC BY-SA 2.0 · Source · ⁨출처⁩

18 · Classification, biodiversity and conservation

A coral reef on the Great Barrier Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨출처⁩
Aerial image of Grand Prismatic Spring (view from the south)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨출처⁩
Insect drawer Natural History Museum Rose Stainthorp 2010 (35900683461)

Natural History Museum: Coleoptera Section from South Kensingon, London, UK · CC BY 2.0 · Source · ⁨출처⁩

19 · Genetic technology

Agarose gel under UV

YTEDG72.k · CC BY 4.0 · Source · ⁨출처⁩
Thermal cycler for PCR

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨출처⁩
CSIRO ScienceImage 381 Genetically Modified Cotton vs Normal Cotton

Plant Industry, CSIRO · CC BY 3.0 · Source · ⁨출처⁩

vocab · Vocabulary trainer images

File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨출처⁩
File:ArteryVeinCS.jpg

FishtailBob · CC BY-SA 4.0 · Source · ⁨출처⁩
File:PBB Protein ATP synthase image.jpg

www.pdb.org · Public domain · Source · ⁨출처⁩
File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨출처⁩
File:E coli at 10000x, original.jpg

Photo by Eric Erbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU · Public domain · Source · ⁨출처⁩
File:Tramlines in a barley crop - geograph.org.uk - 1306062.jpg

Evelyn Simak · CC BY-SA 2.0 · Source · ⁨출처⁩
File:Nephron simple numbers.svg

Jmarchn · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Respiratory system complete en.svg

LadyofHats, Jmarchn · Public domain · Source · ⁨출처⁩
File:Pathology of the lung (cancer).jpg

Unknown photographer · Public domain · Source · ⁨출처⁩
File:Blood vessels-en.svg

Kelvinsong · CC BY-SA 3.0 · Source · ⁨출처⁩
File:The structure of the immature HIV-1 capsid in intact virus particles.png

MarinaVladivostok · CC0 · Source · ⁨출처⁩
File:Histology of articular cartilage zones.jpg

Catherine A. Bautista, Hee Jun Park, Courtney M. Mazur, Roy K. Aaron, Bahar Bilgen · CC0 · Source · ⁨출처⁩
File:Chromosome Terminology.png

Christinelmiller · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Chlorophyll a.svg

David Richfield · Public domain · Source · ⁨출처⁩
File:Paper chromatography in progress.jpg

Amitchell125 · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Collagen (triple helix protein).jpg

Eric Hahn · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Phloem Cells.jpg

Chippolito · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Cotton boll maturing on Bobby Byrd's cotton plant in Hale County near Plainview, Texas. (24490395753).jpg

USDA NRCS Texas · Public domain · Source · ⁨출처⁩
File:DNA double helix horizontal.png

Jerome Walker · Public domain · Source · ⁨출처⁩
File:Kidney Glomerulus Cell Types.png

Artwork by Holly Fischer · CC BY 3.0 · Source · ⁨출처⁩
File:Glycogen structure.jpg

Mikael Häggström · CC0 · Source · ⁨출처⁩
File:Psuedostratified epithelium animated.gif

Laird Sheldahl · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Endomembrane system diagram en.svg

Mariana Ruiz LadyofHats · Public domain · Source · ⁨출처⁩
File:Xenopus laevis nucleosome, Histone H3.3C (2) 1AOI.png

Luger K, Mäder AW, Richmond RK, Sargent DF, Richmond TJ · CC0 · Source · ⁨출처⁩
File:SEM Lymphocyte.jpg

Unknown photographer/artist (False color modifications made by myself--DO11.10) · Public domain · Source · ⁨출처⁩
File:Animal cell structure en.svg

LadyofHats (Mariana Ruiz) · Public domain · Source · ⁨출처⁩
File:Giemsa Stain Macrophage Illustration.png

Noah Smith · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Microtubule structure esp.png

Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Microtubule_structure.png · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Villi & microvilli of small intestine.svg

BallenaBlanca · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Animal mitochondrion diagram et.svg

LadyofHats, translated by ArtjomJemeljanovNERG · Public domain · Source · ⁨출처⁩
File:Monocytes, a type of white blood cell (Giemsa stained).jpg

Dr Graham Beards · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Anopheles stephensi.jpeg

Jim Gathany · Public domain · Source · ⁨출처⁩
File:Complete neuron cell diagram en.svg

LadyofHats · Public domain · Source · ⁨출처⁩
File:Neuro Muscular Junction.png

Doctor Jana · CC BY 4.0 · Source · ⁨출처⁩
File:Neutrophil with anthrax copy.jpg

Volker Brinkmann · CC BY 2.5 · Source · ⁨출처⁩
File:Nucleus Nucleolus and chromatin of animal cell.png

Dan · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Plasmodesmata en.svg

User:Zlir'a · CC0 · Source · ⁨출처⁩
File:Types of amoeboid movement.tif

Peter J M Van Haastert · CC BY 4.0 · Source · ⁨출처⁩
File:Ribosome structure including subunits and binding sites.png

LadyofHats · CC0 · Source · ⁨출처⁩
File:Monocot Root Epidermal Root Hair in Lilium (36045152715).jpg

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨출처⁩
File:Rough endoplasmic reticulum.JPG

Rlawson at English Wikibooks · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Atlantic salmon fish.jpg

Timothy Knepp, U.S. Fish and Wildlife Service · Public domain · Source · ⁨출처⁩
File:Cardiac sarcomere tomogram.jpg

Davide Tamborrini, Zhexin Wang, Thorsten Wagner, Sebastian Tacke, Markus Stabrin, Michael Grange, Ay Lin Kho, Martin Rees, Pauline Bennett, Mathias Gautel, Stefan Raunser · CC BY 4.0 · Source · ⁨출처⁩
File:Neuron figure fr.png

Dominique222 · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Phloem.jpg

Clematis · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Reizleitungssystem 1.png

J. Heuser · CC BY 2.5 · Source · ⁨출처⁩
File:Chromosome Terminology.png

Christinelmiller · CC BY-SA 4.0 · Source · ⁨출처⁩
File:0313 Endoplasmic Reticulum c labeled.png

OpenStax · CC BY 3.0 · Source · ⁨출처⁩
File:Smooth muscle - histology.jpg

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Soybean.USDA.jpg

· Public domain · Source · ⁨출처⁩
File:Prometaphase Mitosis Spindle apparatus Meiosis.jpg

Textured-Sears · CC0 · Source · ⁨출처⁩
File:Stratified squamous epithelium.png

Jmarchn · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Microscope images of starch 3.png

Daniel Domene-López, Juan Carlos García-Quesada, Ignacio Martin-Gullon and Mercedes G. Montalbán · CC BY 4.0 · Source · ⁨출처⁩
File:Urtica dioica leaf cross section micrograph.zip.jpg

Mdantonio2005 · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Skeletal striated muscle.jpg

Nephron · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Taste bud esp.jpg

NEUROtiker · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Telomere caps.gif

U.S. Department of Energy Human Genome Program · Public domain · Source · ⁨출처⁩
File:Chloroplast II.svg

Kelvinsong · CC BY 3.0 · Source · ⁨출처⁩
File:Plant cell structure-en.svg

LadyofHats · Public domain · Source · ⁨출처⁩
File:Mitral valve prolapse subtypes.svg

Y. Coinblatt · CC BY-SA 4.0 · Source · ⁨출처⁩
File:2102 Comparison of Artery and Vein.jpg

OpenStax College · CC BY 3.0 · Source · ⁨출처⁩
File:Inferior vena cava ultrasound.gif

Tinss · CC BY-SA 4.0 · Source · ⁨출처⁩
File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨출처⁩
File:Venus Flytrap showing trigger hairs.jpg

Noah Elhardt · CC BY-SA 2.5 · Source · ⁨출처⁩
File:Yeast cells in wet mount of culture.jpg

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩

A-Level Business · ⁨A-Level 비즈니스⁩

01 · Business and its environment

Bonn, Post-Tower -- 2017 -- 2128 (bw)

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩
Retail outlets, High Street - geograph.org.uk - 7644448

John Baker · CC BY-SA 2.0 · Source · ⁨출처⁩
Austin Texas food truck

Kurtkaiser · CC0 · Source · ⁨출처⁩

02 · Human resource management

Meeting British business representatives (5430620349)

Foreign and Commonwealth Office · OGL v1.0 · Source · ⁨출처⁩
Young Woman in an Interview

Amtec Photos · CC BY-SA 2.0 · Source · ⁨출처⁩

03 · Marketing

Shibuya Crossing

Landry Miguel · CC BY-SA 4.0 · Source · ⁨출처⁩
Branded retail display

tophomedesign · CC BY-SA 2.0 · Source · ⁨출처⁩
Candy products displayed in a supermarket

Nielsoncaetanosalmeron · CC BY 4.0 · Source · ⁨출처⁩

04 · Operations management

Assembly line

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
Daiwa Logistics Tosu Logistics Center

Peka · CC BY-SA 4.0 · Source · ⁨출처⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
FANUC 6-axis welding robots

Phasmatisnox · CC BY 3.0 · Source · ⁨출처⁩

05 · Finance and accounting

Market centre in Tokyo stock exchange

ehnmark · CC BY 2.0 · Source · ⁨출처⁩
Exterior of a modern Wells Fargo bank branch in Athens, Georgia 01

Harrison Keely · CC BY 4.0 · Source · ⁨출처⁩
Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Business and its environment (A Level)

McDonalds Golden Arches

Anthony92931 · CC BY-SA 3.0 · Source · ⁨출처⁩
Shipping containers at West Harbour in Jätkäsaari, Helsinki, Finland, 2008 October

Kari Hakli · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Human resource management (A Level)

Team collaborating around a whiteboard in a modern office

Vitaly Gariev · Unsplash License · Source · ⁨출처⁩

08 · Marketing (A Level)

Times Square (23307389095)

Alex Liivet from Chester, United Kingdom · CC0 · Source · ⁨출처⁩
New World Supermarket During COVID-19 Pandemic

ProtoKiwi · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · Operations management (A Level)

Factory Automation Robotics Palettizing Bread

KUKA Roboter GmbH, Bachmann · Public domain · Source · ⁨출처⁩

10 · Finance and accounting (A Level)

Financial statements analysis

kenteegardin · CC BY-SA 2.0 · Source · ⁨출처⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨출처⁩

A-Level Chemistry · ⁨A-Level 화학⁩

01 · Atomic structure

Scanning tunneling microscope (STM) 250 nm by 250 nm image of one-atom-thick silver islands grown on palladium (111) surface

Ponor · CC BY-SA 4.0 · Source · ⁨출처⁩
Emission spectrum-H

Merikanto, Adrignola · CC0 · Source · ⁨출처⁩

02 · Atoms, molecules and stoichiometry

Vaha KERN - PEJ 2200-2M - 01

El Carlos · CC BY 3.0 · Source · ⁨출처⁩
Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Chemical bonding

Halite (rock salt) crystal

Didier Descouens · CC BY-SA 4.0 · Source · ⁨출처⁩
Methane-3D-balls

· Public domain · Source · ⁨출처⁩

04 · States of matter

Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨출처⁩
Quartz Crystal Cluster (2932215981)

Stephanie Clifford from Arlington, VA, USA · CC BY 2.0 · Source · ⁨출처⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨출처⁩
Octahedral diamond (Mir Kimberlite; Mirnyy, Siberia, Russia) 1 (25177430258)

James St. John · CC BY 2.0 · Source · ⁨출처⁩

05 · Chemical energetics

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨출처⁩
GERMAN BUNSEN (6132104166)

Jason Woodhead · CC BY 2.0 · Source · ⁨출처⁩

06 · Electrochemistry

AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨출처⁩
Rust on iron

Laitr Keiows · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Equilibria

Cobalt(II) chloride solutions

Leiem · CC BY-SA 4.0 · Source · ⁨출처⁩
Yara-Werk bei Tagesanbruch 2011

5snake5 · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Reaction kinetics

Catalytic converter (4293629922)

Oak Ridge National Laboratory · CC BY 2.0 · Source · ⁨출처⁩

09 · The Periodic Table: chemical periodicity

Simple Periodic Table of Elements

SCB2024 · CC0 · Source · ⁨출처⁩

10 · Group 2

Magnesium ribbon burning

Capt. John Yossarian · CC BY-SA 3.0 · Source · ⁨출처⁩
Limestone Cliffs, Little Ormes Head - geograph.org.uk - 7808316

N Chadwick · CC BY-SA 2.0 · Source · ⁨출처⁩

11 · Group 17

Silver halide precipitates

Rrausch1974 · CC BY-SA 3.0 · Source · ⁨출처⁩
Bromine-ampoule

Jurii · CC BY 3.0 · Source · ⁨출처⁩
Liquid Pool Chlorine

Maksym Kozlenko · CC BY-SA 4.0 · Source · ⁨출처⁩

12 · Nitrogen and sulfur

AerialViewPhotochemicalSmogMexicoCity 2

Creator:Fidel Gonzalez · CC BY-SA 3.0 · Source · ⁨출처⁩
Mossmorran chemical plant - geograph.org.uk - 5288385

M J Richardson · CC BY-SA 2.0 · Source · ⁨출처⁩

13 · An introduction to AS Level organic chemistry

Crude oil

Glasbruch2007 · CC BY-SA 3.0 · Source · ⁨출처⁩
1-Undecanol molecular model

RandomKatze · CC0 · Source · ⁨출처⁩

14 · Hydrocarbons

Gas stove blue flames

Marina Burity from Santo André, Brazil · CC BY-SA 2.0 · Source · ⁨출처⁩
Anacortes Refinery 31911

Walter Siegmund (talk) · CC BY 2.5 · Source · ⁨출처⁩

15 · Halogen compounds

Lata de spray congelante

Nave do Conhecimento · CC0 · Source · ⁨출처⁩
reflux

Max1musmax · CC BY-SA 2.0 · Source · ⁨출처⁩
Rotační vakuová odparka

Milda 444 · CC BY-SA 4.0 · Source · ⁨출처⁩

16 · Hydroxy compounds

Fraktionierte Destillation - Laboratory Fractional distillation apparatus

Chemie-Verbände Baden-Württemberg · CC BY 2.0 · Source · ⁨출처⁩
Hand sanitizer in Bangkok in March 2020 - 1

Mx. Granger · CC0 · Source · ⁨출처⁩
Erlenmeyer TSB fermentation replicates

Luis Fernando Flores LAB · CC BY-SA 4.0 · Source · ⁨출처⁩

17 · Carbonyl compounds

Tollensprobe

Tmv23 · CC BY-SA 3.0 · Source · ⁨출처⁩
Nail polish remover

Kaushik Narasimhan · CC BY 2.0 · Source · ⁨출처⁩

18 · Carboxylic acids and derivatives

Synthetic vinegar bottles

Sgroey · CC BY-SA 4.0 · Source · ⁨출처⁩
Glass perfume bottle MET DP108895

This file was donated to Wikimedia Commons as part of a project by the Metropolitan Museum of Art. See the Image and Data Resources Open Access Policy · CC0 · Source · ⁨출처⁩

19 · Nitrogen compounds

Jana nylon stockings in packaging

Bevaringstenestene / Museumssenteret i Hordaland · CC BY-SA 4.0 · Source · ⁨출처⁩
2021-09-05 AsparnZaya Museum Färber

Robert Kropf · CC BY-SA 4.0 · Source · ⁨출처⁩

20 · Polymerisation

Polyethylene balls5

Lluis tgn · CC BY-SA 3.0 · Source · ⁨출처⁩
004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩

21 · Organic synthesis

Anterone (cyproterone acetate) tablets in Australia, with three blister packs

BlankEclair · CC BY-SA 4.0 · Source · ⁨출처⁩
Pexeso dělička

Milda 444 · CC BY-SA 4.0 · Source · ⁨출처⁩

22 · Analytical techniques

BrukerDaltonics maXis1

Mike25 Michael Willett · Public domain · Source · ⁨출처⁩
FTIR spectrometer

Wang, F., Zhang, L., Zhang, X., Li, H. and Wu, S · CC BY 4.0 · Source · ⁨출처⁩

23 · Chemical energetics

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨출처⁩
HALIT X NaCl Natriumchlorid WÜRFEL KUBUS 50P

Hans-Joachim Engelhardt · CC BY-SA 4.0 · Source · ⁨출처⁩

24 · Electrochemistry

Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum

Mattes · CC BY-SA 3.0 · Source · ⁨출처⁩
Barrel Plating For Small Parts

Encik Tekateki · CC BY-SA 4.0 · Source · ⁨출처⁩

25 · Equilibria

PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩
2015 Jaskinia Niedźwiedzia w Kletnie, szata naciekowa 26

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨출처⁩

26 · Reaction kinetics

Catalysts

Shubhrapdil · CC BY-SA 4.0 · Source · ⁨출처⁩
Gas syringe

User:Geni · CC BY-SA 3.0 · Source · ⁨출처⁩

27 · Group 2

Drehrohrofen Rohrdorf

Schmidti · CC BY-SA 3.0 · Source · ⁨출처⁩
Idrossido di rame

Alvy16 · CC BY 4.0 · Source · ⁨출처⁩

28 · Chemistry of transition elements

Coloured-transition-metal-solutions

No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source · ⁨출처⁩
Ruby crystal 1

W.carter · CC BY 4.0 · Source · ⁨출처⁩

30 · Hydrocarbons

White coloured mothball (naphthalene ball) 20230315 180901

Wiki Farazi · CC0 · Source · ⁨출처⁩

31 · Halogen compounds

SPRAYING PESTICIDES - NARA - 544246 (cropped)

John Messina · Public domain · Source · ⁨출처⁩

32 · Hydroxy compounds

Bar of carbolic soap

SamBlob · CC BY-SA 3.0 · Source · ⁨출처⁩
Phenol substance photo

Rillke · CC BY-SA 3.0 · Source · ⁨출처⁩

33 · Carboxylic acids and derivatives

Lemon - whole and split

Ivar Leidus · CC BY-SA 4.0 · Source · ⁨출처⁩
Regular strength enteric coated aspirin tablets

Ragesoss · CC BY-SA 4.0 · Source · ⁨출처⁩

34 · Nitrogen compounds

Methyl-orange-sample

Ben Mills · Public domain · Source · ⁨출처⁩
Paracetamol Tablets BP 500mg

themostinept · CC BY-SA 2.0 · Source · ⁨출처⁩

35 · Polymerisation

Nailoni süntees 2

Thctamm · CC BY-SA 3.0 · Source · ⁨출처⁩
Bales of PET bottles closeup

Grendelkhan · CC BY-SA 4.0 · Source · ⁨출처⁩

37 · Analytical techniques

Bruker 300 MHz NMR Spectrometer

Lihan Yao · CC BY 2.0 · Source · ⁨출처⁩
Thin layer Chromatographic Plate Under 365nm UV light

Ikramul Hasan Imran · CC BY 4.0 · Source · ⁨출처⁩

A-Level Computer Science · ⁨A-Level 컴퓨터 과학⁩

01 · Information representation

Single-digit seven-segment LED display

The Pi Hut · Product image · Source · ⁨출처⁩
Chinese Suanpan Abacus

Felix Winkelnkemper · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Communication

TP-Link TL-SG105 5-port gigabit switch

TP-Link · Product image · Source · ⁨출처⁩
Cat6 Ethernet cable with RJ-45 plugs

Cable Matters · Product image · Source · ⁨출처⁩

03 · Hardware

Opened hard disk drive

Zzubnik · Public domain · Source · ⁨출처⁩
Inside an SSD

Michael Bemmerl · CC BY 3.0 de · Source · ⁨출처⁩
Computer monitor

Dell · Product image · Source · ⁨출처⁩
Wireless mouse

Logitech · Product image · Source · ⁨출처⁩
Computer keyboard

Logitech · Product image · Source · ⁨출처⁩
DDR5 RAM module

Corsair · Product image · Source · ⁨출처⁩
Epson Perfection flatbed scanner

Epson · Product image · Source · ⁨출처⁩
Laser printer

Brother · Product image · Source · ⁨출처⁩
FDM 3D printer

Creality · Product image · Source · ⁨출처⁩
USB microphone

Logitech · Product image · Source · ⁨출처⁩
Stepper motor

Adafruit · Product image · Source · ⁨출처⁩
External optical disc drive

ASUS · Product image · Source · ⁨출처⁩
Meta Quest 3 VR headset

Meta · Product image · Source · ⁨출처⁩
Thermistor

SparkFun · Product image · Source · ⁨출처⁩
touchscreen

Rawpixel Ltd · CC0 · Source · ⁨출처⁩
EPROM Chip

WestonChants · CC BY-SA 4.0 · Source · ⁨출처⁩
Garmin Forerunner 55

Melyanac · CC0 · Source · ⁨출처⁩

04 · Processor Fundamentals

CPU chip

Eric Gaba (Sting - fr:Sting) · CC BY-SA 3.0 · Source · ⁨출처⁩
CPU socket

Smial (talk) · FAL · Source · ⁨출처⁩
Amstrad VSC386SXD V2.01

Mister rf · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · System Software

VirtualBox Windows 11 24H2 (Version 10.0.26100.1742.240906-0331) 04 02 2025 17 34 35

OS: Microsoft Corporation Screenshot: PantheraLeo1359531 😺 (talk) · Public domain · Source · ⁨출처⁩
OnePlus Nord smartphone displaying Android home screen

Gannu03 · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Security, privacy and data integrity

DigitalPersona U.are.U 4500 fingerprint reader

HID DigitalPersona · Product image · Source · ⁨출처⁩
RSA SecurID 700 hardware token

RSA Security · Product image · Source · ⁨출처⁩

07 · Ethics and Ownership

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨출처⁩
Ewaste-pile

AvWijk · Public domain · Source · ⁨출처⁩

08 · Databases

Hand in filing cabinet

Watty62 · CC BY-SA 4.0 · Source · ⁨출처⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨출처⁩

09 · Algorithm Design and Problem-solving

Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨출처⁩

10 · Data Types and Structures

Stack of multicolored books on a table

Alexander Grey · CC0 · Source · ⁨출처⁩
Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨출처⁩

11 · Programming

Java code demonstrating source-code abilities

Ilyaaaaa · CC BY-SA 4.0 · Source · ⁨출처⁩
Programmer at work (Unsplash)

Crew crew · CC0 · Source · ⁨출처⁩

12 · Software Development

LampFlowchart

svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source · ⁨출처⁩
team-meeting

Startup Stock Photos · CC0 · Source · ⁨출처⁩

14 · Communication and internet technologies

TP-Link Archer AX55 Wi-Fi 6 router

TP-Link · Product image · Source · ⁨출처⁩
Nighthawk CM2000 cable modem

NETGEAR · Product image · Source · ⁨출처⁩
GS308 8-port Gigabit Ethernet switch

NETGEAR · Product image · Source · ⁨출처⁩
Fiber Optical Cable

Bquast · CC0 · Source · ⁨출처⁩
ASTRA2Connect Dish

Satbuff at English Wikipedia · Public domain · Source · ⁨출처⁩

15 · Hardware and Virtual Machines

CPU cooler

osman gucel · CC BY 2.0 · Source · ⁨출처⁩
Server racks

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨출처⁩
GeForce RTX 4070 graphics card

NVIDIA · Product image · Source · ⁨출처⁩
ASUS TUF Gaming B650E-PLUS motherboard

ASUS · Product image · Source · ⁨출처⁩

16 · System Software

168 pin and 184 pin DIMM

Veeblefetzer · CC BY 4.0 · Source · ⁨출처⁩
Intel CPU Core 2 Duo E8400 Wolfdale perspective

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨출처⁩

17 · Security

YubiKey 5 NFC hardware security key

Yubico · Product image · Source · ⁨출처⁩
Enigma M4 Cipher Machine - Caen Memorial museum 2025-03-24

Andy Li · CC0 · Source · ⁨출처⁩

18 · Artificial Intelligence (AI)

Self-driving car

Dllu · CC BY 4.0 · Source · ⁨출처⁩
Humanoid robot

Willy Jackson · CC BY-SA 4.0 · Source · ⁨출처⁩
KUKA Industrial Robots IR

Mixabest · CC BY-SA 3.0 · Source · ⁨출처⁩

19 · Computational thinking and Problem-solving

Telefonbog ubt-1

© 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source · ⁨출처⁩
54 Nancy bibliothèque municipale - catalogue

Marc Baronnet · CC BY-SA 3.0 · Source · ⁨출처⁩

A-Level Economics · ⁨A-Level 경제학⁩

01 · Basic economic ideas and resource allocation

001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
University students in a technology learning classroom

Ellamaria elshmod · CC BY-SA 4.0 · Source · ⁨출처⁩
Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59

Jet6581 · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · The price system and the microeconomy

Outdoor market fruit and vegetable stall Market Place Romford London 01

Acabashi · CC BY-SA 4.0 · Source · ⁨출처⁩
Ingo petrol station Fårösund July 01

Arild Vågen · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Government microeconomic intervention

Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨출처⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨출처⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨출처⁩

04 · The macroeconomy

Central Business District skyline, Singapore, at night

Andrew McMillan · Public domain · Source · ⁨출처⁩
Aisle in Daily Market Groceries Canberra City October 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Government macroeconomic intervention

Bank of England Building, London, UK - Diliff

Diliff · CC BY-SA 3.0 · Source · ⁨출처⁩
Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · International economic issues

Currency Exchange - Moldova (by David Stanley)

D-Stanley · CC BY 2.0 · Source · ⁨출처⁩
Red Hook Container Terminal New York September 2016 001

King of Hearts · CC BY-SA 4.0 · Source · ⁨출처⁩
Red Hook Container Terminal New York September 2016 001

King of Hearts · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · The price system and the microeconomy (A Level)

Large interior view of Plaza Singapura Shopping mall Orchard Road Singapore

Basile Morin · CC BY-SA 4.0 · Source · ⁨출처⁩
ArcelorMittal steel plant on the Cuyahoga River

Roy Luck · CC BY 2.0 · Source · ⁨출처⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Government microeconomic intervention (A Level)

Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨출처⁩
Garment factory in Bangladesh Women working

Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source · ⁨출처⁩
Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · The macroeconomy (A Level)

Reigate, Lloyds Bank High Street - geograph.org.uk - 4306372

Michael Garlick · CC BY-SA 2.0 · Source · ⁨출처⁩
Skyscraper Construction in Frankfurt, Germany

Spinarak · CC0 · Source · ⁨출처⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨출처⁩

10 · Government macroeconomic intervention (A Level)

Seat of the European Central Bank and Frankfurt Skyline at dawn 20150422 1

DXR · CC BY-SA 4.0 · Source · ⁨출처⁩
Trading Floor at the New York Stock Exchange

Scott Beale · CC BY-SA 4.0 · Source · ⁨출처⁩

11 · International economic issues (A Level)

Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨출처⁩
Aerial view of a busy tomato market in Lagos Nigeria

Ayorinde Ogundele · CC BY-SA 4.0 · Source · ⁨출처⁩

A-Level Further Mathematics · ⁨A-Level 고등 수학⁩

01 · Further Pure Mathematics 1

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨출처⁩
Vatican Museums Spiral Staircase 2012

Colin · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · Further Pure Mathematics 2

Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨출처⁩
Metall-Zierkette in Nahaufnahme

Rhetos · CC0 · Source · ⁨출처⁩

03 · Further Mechanics

Newton's Cradle (15221366308)

Sheila Sund from Salem, United States · CC BY 2.0 · Source · ⁨출처⁩
James Parker hammer throw

Tech. Sgt. Mike Hammond · Public domain · Source · ⁨출처⁩
Fuente en Baku, Azerbaiyán, 2016-09-26, DD 227-229 HDR

Diego Delso · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Further Probability & Statistics

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨출처⁩
Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨출처⁩

A-Level Mathematics · ⁨A-Level 수학⁩

01 · Pure Mathematics 1

London Eye at sunset 2013-07-19

Bob Collowan · CC BY-SA 3.0 · Source · ⁨출처⁩
Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · Pure Mathematics 2

Seismograph recording

Atomicdragon136 · CC BY 4.0 · Source · ⁨출처⁩
SLNSW 8633 Dense crowd at SCG for test cricket

Sam Hood · Public domain · Source · ⁨출처⁩

03 · Pure Mathematics 3

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨출처⁩
Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨출처⁩

04 · Mechanics

Newton's Cradle (15221366308)

Sheila Sund from Salem, United States · CC BY 2.0 · Source · ⁨출처⁩
Top Rope Climbing

Matito · CC BY-SA 2.0 · Source · ⁨출처⁩
First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨출처⁩

05 · Probability & Statistics 1

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨출처⁩
Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Probability & Statistics 2

poisson-queue

@gadl · CC BY-SA 2.0 · Source · ⁨출처⁩
Audience-2595

Loadmaster (David R. Tribble) This image was made by Loadmaster (David R. Tribble). Email the author: David R. Tribble Also see my personal gallery at Google Photos · CC BY-SA 3.0 · Source · ⁨출처⁩

A-Level Physics · ⁨A-Level 물리학⁩

01 · Physical quantities and units

Mahr Micromar 40A 0–25 mm Micrometer (part labels added)

Lucasbosch · CC BY-SA 3.0 · Source · ⁨출처⁩
Mahr MarCal 16 N vernier caliper

Lucasbosch · CC BY-SA 3.0 · Source · ⁨출처⁩
Messschieber

ArtMechanic · CC BY-SA 3.0 · Source · ⁨출처⁩
5783metric-micrometer

Photograph taken by Glenn McKechnie · CC BY-SA 2.0 · Source · ⁨출처⁩

02 · Kinematics

Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨출처⁩
Spd Lmt Enforcement Camera in Seohaean Expwy Haemi IC-Seosan IC(Seoul Dir)

Jhcbs1019 · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Dynamics

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨출처⁩
Crash test car from the West Germany USA zone before 120278145 (cropped)

Kalispera Dell · CC BY 3.0 · Source · ⁨출처⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Forces, density and pressure

Fischer precision aneroid barometer

Fischer · Product image · Source · ⁨출처⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨출처⁩
CBD Cranes

Thabang S. Peter · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Work, energy and power

Wind turbines along North Middle Road, Essex County, Ontario, 2025-06-29

Crisco 1492 · CC BY-SA 4.0 · Source · ⁨출처⁩
Leviathan ascending (2)

Jason Zhang · CC BY-SA 3.0 · Source · ⁨출처⁩
2013-10-03 Fierza Hydroelectric Power Station, Albania 0632

You may re-use this image under the terms of the license using the following reference: Image: Wikipedia / Tobias Klenze / CC-BY-SA 4.0. The license must be a link! · CC BY 3.0 · Source · ⁨출처⁩
Leichtathletik Gala Linz 2018 pole vault Daubner-6249

Isiwal · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Deformation of solids

Shimadzu AGS-X universal testing machine

Shimadzu · Product image · Source · ⁨출처⁩
SpringHandExerciser

Simon Speed · Public domain · Source · ⁨출처⁩

07 · Waves

Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨출처⁩
Plastic Protractor Polarized 05375

Nevit Dilmen · CC BY-SA 3.0 · Source · ⁨출처⁩
Breaking waves, Sète cf03

Christian Ferrer · CC BY 4.0 · Source · ⁨출처⁩

08 · Superposition

Two-point-interference-ripple-tank

The original uploader was RenamedUser2 at English Wikipedia · BSD · Source · ⁨출처⁩
Soap Bubble - foliage background - iridescent colours - Traquair 040801

· CC BY-SA 3.0 · Source · ⁨출처⁩

09 · Electricity

Electronic-Axial-Lead-Resistors-Array

Evan-Amos · Public domain · Source · ⁨출처⁩
Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨출처⁩

10 · D.C. circuits

Multimeter probes on breadboard

Zeroping · CC BY 4.0 · Source · ⁨출처⁩
400 points breadboard

oomlout · CC BY-SA 2.0 · Source · ⁨출처⁩
Multimeter resistor bank (6952361918)

Dennis van Zuijlekom from Ermelo, The Netherlands · CC BY-SA 2.0 · Source · ⁨출처⁩

11 · Particle physics

Artificial nuclide americium-241 emitting alpha particles inserted into a cloud chamber for visualisation

Nuledo · CC BY-SA 4.0 · Source · ⁨출처⁩
Bubble chamber event. Decay of neutral lambda, anti-lambda hyperons. Photograph circa July 1959. Bubble Chamber-772A - DPLA - 5141859e360581251906c073668c70de

Department of Energy. Lawrence Berkeley National Laboratory. Public Affairs Department. Strategic Resources Office. Photography Services. 2012 · Public domain · Source · ⁨출처⁩
Compact Linear Accelerator for Research and Applications (CLARA)

D2theW · CC0 · Source · ⁨출처⁩

12 · Motion in a circle

Ferris wheel Nice Dec 2008 a

Cayambe · CC BY-SA 3.0 · Source · ⁨출처⁩
Ferris wheel Nice Dec 2008 a

Cayambe · CC BY-SA 3.0 · Source · ⁨출처⁩

13 · Gravitational fields

Saturn during Equinox

NASA / JPL / Space Science Institute · Public domain · Source · ⁨출처⁩
STS-135 final flyaround of ISS 1

NASA · Public domain · Source · ⁨출처⁩

14 · Temperature

Hot fries, cold drink. (17176913004)

Daniel Ramirez from Honolulu, USA · CC BY 2.0 · Source · ⁨출처⁩
Mercury Thermometer

Anonimski · CC BY-SA 3.0 · Source · ⁨출처⁩

15 · Ideal gases

Scuba diver practising a no mask swim

Yu Diving · CC BY-SA 2.0 · Source · ⁨출처⁩
2008-07-24 Bundle of compressed gas bottles

Ildar Sagdejev (Specious) · CC BY-SA 4.0 · Source · ⁨출처⁩

16 · Thermodynamics

Dampfturbine Laeufer01

Siemens Pressebild, http://www.siemens.com · CC BY-SA 3.0 · Source · ⁨출처⁩
Rostock Power Station, SW view

Radomianin · CC BY-SA 4.0 · Source · ⁨출처⁩

17 · Oscillations

Tacoma Narrows still

Barney Elliot · Public Domain · Source · ⁨출처⁩
Shortt Synchronome free pendulum clock

Unknown authorUnknown author · Public domain · Source · ⁨출처⁩
Close up of an acoustic guitar being played

Nataev · CC BY-SA 4.0 · Source · ⁨출처⁩

18 · Electric fields

Van de Graaff generator

3B Scientific · Product image · Source · ⁨출처⁩
Lightning strike jan 2007

Fir0002 · GFDL 1.2 · Source · ⁨출처⁩

19 · Capacitance

Capacitors Various

Intiti · Public domain · Source · ⁨출처⁩
Electrolytic capacitors mounted on a circuit board

Giovanna 27 · CC BY 4.0 · Source · ⁨출처⁩

20 · Magnetic fields

Bar-magnets-repelling-iron-filings-max

MikeRun, Vera Wurmsdobler · CC BY-SA 4.0 · Source · ⁨출처⁩
Iron-filings-around-magnet

· CC BY-SA 2.0 · Source · ⁨출처⁩
HITACHI, Magnetic Resonance Imaging System, ECHELON OVAL,

Mj-bird · CC BY-SA 3.0 · Source · ⁨출처⁩

21 · Alternating currents

Triangular wave and square wave on oscilloscope screen (cropped)

User:Xato · CC0 · Source · ⁨출처⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨출처⁩

22 · Quantum physics

Periodic Table of Photos of Element Spectra

Umop503 · CC0 · Source · ⁨출처⁩
Ground mounted solar panels.gk

Grendelkhan · CC BY-SA 4.0 · Source · ⁨출처⁩

23 · Nuclear physics

De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)

Trougnouf · CC BY 4.0 · Source · ⁨출처⁩
Particle Tracks in AWAN Expansion Cloud Chamber

Kebuk awan · CC BY-SA 4.0 · Source · ⁨출처⁩

24 · Medical physics

Chest Xray PA 3-8-2010

Stillwaterising · CC0 · Source · ⁨출처⁩
PET-image

Jens Maus (http://jens-maus.de/) · Public domain · Source · ⁨출처⁩
Obstetric ultrasound scan monitor showing 20-week human fetus profile in Navi Mumbai 2015

Goleisureintl · CC BY 4.0 · Source · ⁨출처⁩

25 · Astronomy and cosmology

Hubble Ultra Deep Field

NASA and the European Space Agency. Edited by Noodle snacks · Public domain · Source · ⁨출처⁩
Andromeda Galaxy (M31)

Adam Evans · CC BY 2.0 · Source · ⁨출처⁩
Pillars of Creation (Eagle Nebula)

NASA, ESA, and the Hubble Heritage Team (STScI/AURA) · Public domain · Source · ⁨출처⁩
Very Large Telescope (ESO)

G.Gillet/ESO · CC BY 3.0 · Source · ⁨출처⁩

0101 · Physical quantities

Digital vernier caliper

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨출처⁩

0102 · SI units

Prototype kilogram replica

Japs 88 · CC BY-SA 3.0 · Source · ⁨출처⁩

AP 2-D Art and Design · ⁨AP 2D 예술 및 디자인⁩

01 · Elements of Art

Wright of Derby, The Orrery

Joseph Wright of Derby · Public domain · Source · ⁨출처⁩
Vincent van Gogh - Sunflowers - VGM F458

Vincent van Gogh · Public domain · Source · ⁨출처⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨출처⁩
Jeansfabric

Thegreenj · CC BY-SA 3.0 · Source · ⁨출처⁩
Vincent van Gogh - Self-Portrait - Google Art Project (454045)

Vincent van Gogh · Public domain · Source · ⁨출처⁩

02 · Principles of Design

Da Vinci Vitruve Luc Viatour

Leonardo da Vinci · Public domain · Source · ⁨출처⁩
Textile, Strawberry Thief, designed 1883, printed ca. 1934 (CH 18340065)

Unknown artistUnknown artist · Public domain · Source · ⁨출처⁩
Vincent van Gogh - Starry Night - Google Art Project

Vincent van Gogh · Public domain · Source · ⁨출처⁩
Wright of Derby, The Orrery

Joseph Wright of Derby · Public domain · Source · ⁨출처⁩

03 · 2-D Media, Materials, and Techniques

Albrecht Dürer - Melencolia I - Google Art Project (427760)

Albrecht Dürer · Public domain · Source · ⁨출처⁩
Alfred Stieglitz - The Steerage - Google Art Project, from Getty

Alfred Stieglitz · Public domain · Source · ⁨출처⁩
Claude Monet - Seerosen

Claude Monet · Public domain · Source · ⁨출처⁩

04 · Investigate: Inquiry and the Artistic Process

First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨출처⁩
Color wheel with primaries and secondaries

eXercise project · CC0 · Source · ⁨출처⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨출처⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨출처⁩

05 · Make: Practice, Experimentation, and Revision

Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨출처⁩
Vincent van Gogh - Starry Night - Google Art Project

Vincent van Gogh · Public domain · Source · ⁨출처⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨출처⁩

06 · Present: Communication and the AP Portfolio

Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨출처⁩
Claude Monet - Seerosen

Claude Monet · Public domain · Source · ⁨출처⁩
Kathe Kollwitz - Self-portrait NGA 1943.3.5217

Käthe Kollwitz · Public domain · Source · ⁨출처⁩

AP Biology · ⁨AP 생물학⁩

01 · Chemistry of Life

Iceberg with hole near Sandersons Hope 2007-07-28 2

Kim Hansen · CC BY-SA 3.0 · Source · ⁨출처⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨출처⁩
1GZX Haemoglobin

Zephyris at English Wikipedia · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · Cell Structure and Function

Onion Epidermis Cells W.M. 40x - 104

loganrickert · CC BY 2.0 · Source · ⁨출처⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨출처⁩
SEM blood cells

Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source · ⁨출처⁩
Plasmolysis of red onion (Allium cepa) cells

Trương Minh Khải · CC BY 4.0 · Source · ⁨출처⁩

03 · Cellular Energetics

Mitochondria, mammalian lung - TEM

Louisa Howard · Public domain · Source · ⁨출처⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨출처⁩
Plastic spoon n Laundry detergent n Washing powder in white

Lebacno · CC BY-SA 3.0 · Source · ⁨출처⁩

04 · Cell Communication and Cell Cycle

Onion skin mitosis 20x magnification - uafcde

UAF Center for Distance Education · CC BY 2.0 · Source · ⁨출처⁩
Human fibroblast undergoing cytokinesis

Reneferretti1 · CC BY 4.0 · Source · ⁨출처⁩
Mitosis in Onion Root various stages (Metaphase)

Natalierussell77 · CC BY-SA 4.0 · Source · ⁨출처⁩
1225 Chemical Synapse ku

https://openstax.org · CC BY 4.0 · Source · ⁨출처⁩

05 · Heredity

Karyotype (normal)

National Cancer Institute · Public domain · Source · ⁨출처⁩
Cepaea nemoralis pair banded shells

· CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Gene Expression and Regulation

Agarose gel electrophoresis in UV light

YTEDG72.k · CC BY 4.0 · Source · ⁨출처⁩
Thermal cycler for PCR

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨출처⁩
DNA Extraction

Joo Nath · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Natural Selection

Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨출처⁩
Biston.betularia.f.carbonaria.7209

Chiswick Chap · CC BY-SA 3.0 · Source · ⁨출처⁩
Berlin Archaeopteryx

Emily Willoughby ([email protected]) · CC BY-SA 4.0 · Source · ⁨출처⁩
Stromatolites in Shark Bay

Happy Little Nomad · CC BY-SA 2.0 · Source · ⁨출처⁩
Tree of life SVG

Ivica Letunic: Iletunic. Retraced by Mariana Ruiz Villarreal: LadyofHats · Public domain · Source · ⁨출처⁩
Active hydrothermal vent- Mushroom (OOI 222)

Ocean Observatories Initiative · Public domain · Source · ⁨출처⁩
Berlin Archaeopteryx

Emily Willoughby ([email protected]) · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Ecology

Coral Outcrop Flynn Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨출처⁩
Deforested area, Goldisthal, 2023-05-20

Radomianin · CC BY-SA 4.0 · Source · ⁨출처⁩
Ocellaris clownfish

Metatron · CC BY-SA 3.0 · Source · ⁨출처⁩
A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)

NPS Photo · Public domain · Source · ⁨출처⁩
Sunflower against the blue sky

Timothy Akolamazima · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Calculus AB · ⁨AP 미적분학 AB⁩

01 · Limits and Continuity

GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨출처⁩

02 · Differentiation: Definition and Fundamental Properties

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Differentiation: Composite, Implicit, and Inverse Functions

Matryoshka dolls - Bor local museum

Лапоть · CC0 · Source · ⁨출처⁩

04 · Contextual Applications of Differentiation

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩
Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Analytical Applications of Differentiation

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨출처⁩
New fenced enclosures at garden centre - geograph.org.uk - 6877019

Alan Reid · CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Integration and Accumulation of Change

Water tank

Muhammad Saeed · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Differential Equations

EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨출처⁩
Black Coffee and Tea in White Cup is Hot

epSos.de · CC BY 2.0 · Source · ⁨출처⁩

08 · Applications of Integration

Potter at work

Whippetsgalore · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Calculus BC · ⁨AP 미적분학 BC⁩

01 · Limits and Continuity

GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨출처⁩

02 · Differentiation: Definition and Fundamental Properties

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Differentiation: Composite, Implicit, and Inverse Functions

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨출처⁩

04 · Contextual Applications of Differentiation

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩
Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Analytical Applications of Differentiation

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨출처⁩
New fenced enclosures at garden centre

Alan Reid · CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Integration and Accumulation of Change

Water tank

Muhammad Saeed · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Differential Equations

EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨출처⁩
Black Coffee and Tea in White Cup is Hot

epSos.de · CC BY 2.0 · Source · ⁨출처⁩

08 · Applications of Integration

Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨출처⁩
Potter at work

Whippetsgalore · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · Parametric Equations, Polar Coordinates, and Vector-Valued Functions

International Space Station after undocking of STS-132

NASA/Crew of STS-132 · Public domain · Source · ⁨출처⁩

10 · Infinite Sequences and Series

Russian-Matroshka no bg

Original photo: User:Fanghong Derivative work: User:Gnomz007 · CC BY-SA 3.0 · Source · ⁨출처⁩

AP Chemistry · ⁨AP 화학⁩

01 · Atomic Structure and Properties

Coloured flames of methanol solutions of metal salts and compounds

Hegelrast · CC BY-SA 4.0 · Source · ⁨출처⁩
Simple Periodic Table of Elements

SCB2024 · CC0 · Source · ⁨출처⁩

02 · Compound Structure and Properties

Halite (rock salt) crystal

Didier Descouens · CC BY-SA 4.0 · Source · ⁨출처⁩
Octahedral diamond

James St. John · CC BY 2.0 · Source · ⁨출처⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨출처⁩

03 · Properties of Substances and Mixtures

Copper sulfate pentahydrate crystals

W. Oelen · CC BY-SA 3.0 · Source · ⁨출처⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨출처⁩

04 · Chemical Reactions

Magnesium ribbon burning

Capt. John Yossarian · CC BY-SA 3.0 · Source · ⁨출처⁩
Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Kinetics

Catalytic converter (4293629922)

Oak Ridge National Laboratory · CC BY 2.0 · Source · ⁨출처⁩
Gas syringe

User:Geni · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Thermochemistry

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨출처⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨출처⁩

07 · Equilibrium

Cobalt(II) chloride solutions

Leiem · CC BY-SA 4.0 · Source · ⁨출처⁩
Yara-Werk bei Tagesanbruch 2011

5snake5 · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Acids and Bases

Blue and red litmus paper

Meganbeckett27 · CC BY-SA 3.0 · Source · ⁨출처⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · Thermodynamics and Electrochemistry

AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨출처⁩
AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨출처⁩
AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Computer Science A · ⁨AP 컴퓨터 과학 A⁩

01 · Using Objects and Methods

Intel CPU Core 2 Duo E8400 Wolfdale perspective

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨출처⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Selection and Iteration

LampFlowchart

svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source · ⁨출처⁩
UK Red Traffic Light With Green Filter Arrow - geograph.org.uk - 6409628

Gary · CC BY-SA 2.0 · Source · ⁨출처⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩

03 · Class Creation

Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨출처⁩
Blueprint - Hallwylska museet - 101011

Unknown authorUnknown author · Public domain · Source · ⁨출처⁩

04 · Data Collections

Hand in filing cabinet

Watty62 · CC BY-SA 4.0 · Source · ⁨출처⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨출처⁩

AP Computer Science Principles · ⁨AP 컴퓨터 과학 원리⁩

01 · Creative Development

Programmer at work (Unsplash)

Crew crew · CC0 · Source · ⁨출처⁩
Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Data

Binary-code

Graph+sas · CC BY-SA 4.0 · Source · ⁨출처⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Algorithms and Programming

Telefonbog ubt-1

© 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source · ⁨출처⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Computer Systems and Networks

Ethernet RJ45 connector p1160054

No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source · ⁨출처⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨출처⁩
Netgear-Nighthawk-AC1900-WiFi-Router

Evan-Amos · Public domain · Source · ⁨출처⁩

05 · Impact of Computing

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨출처⁩
Ewaste-pile

AvWijk · Public domain · Source · ⁨출처⁩
Self-driving car

Dllu · CC BY 4.0 · Source · ⁨출처⁩
Computer stations at Uganda Development Services Public Library, Kamuli district

AKibombo · CC BY-SA 4.0 · Source · ⁨출처⁩
HughesNet Satellite Internet Dish at Rural Cabin (42696447671)

Tony Webster from Minneapolis, Minnesota, United States · CC BY 2.0 · Source · ⁨출처⁩
Gender Gap Wikipedia Edit-a-thon (6)

Liridon · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Cybersecurity · ⁨AP 사이버보안⁩

01 · Introduction to Security

YubiKey 5 NFC hardware security key

Yubico · Product image · Source · ⁨출처⁩
RSA SecurID 700 hardware token

RSA Security · Product image · Source · ⁨출처⁩

02 · Securing Spaces

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨출처⁩
Vandal dome-style security camera next to signage on exterior of Target store

Myotus · CC BY-SA 4.0 · Source · ⁨출처⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Securing Networks

Ethernet switch 2

Deavmi · CC BY-SA 3.0 · Source · ⁨출처⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨출처⁩

04 · Securing Devices

YubiKey 4 and 4C

Tony Webster from Minneapolis, Minnesota, United States. Cropped by SUM1 · CC BY 2.0 · Source · ⁨출처⁩
ClamTk 5.27

Mauroni, Dave · GPL · Source · ⁨출처⁩
Biometric Fingerprint Scanner

Sanskritibharti1398 · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Securing Applications and Data

Enigma-IMG 0487-black

Rama · CC BY-SA 2.0 fr · Source · ⁨출처⁩
Enigma M4 Cipher Machine - Caen Memorial museum 2025-03-24

Andy Li · CC0 · Source · ⁨출처⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Drawing · ⁨AP 드로잉⁩

01 · Line and Mark-Making

Albrecht Dürer - Praying Hands, 1508 - Google Art Project

Albrecht Dürer · Public domain · Source · ⁨출처⁩
Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨출처⁩
Seurat Paul Signac

Georges Seurat · Public domain · Source · ⁨출처⁩

02 · Value, Light, and Form

Seurat Paul Signac

Georges Seurat · Public domain · Source · ⁨출처⁩

03 · Space, Depth, and Proportion

Amboy (California, USA), Hist. Route 66 -- 2012 -- 1

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩
Smoky Mountain Vista from Andrews Bald

Scott Basford · CC BY-SA 3.0 · Source · ⁨출처⁩

04 · Drawing Media and Processes

Schets van een stilleven van pannen en een fles, RP-T-1962-20(V)

Rijksmuseum · CC0 · Source · ⁨출처⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨출처⁩
Tobias asleep, Rembrandt van Rijn, c. 1651, pen and brown ink, corrected with white gouache, 16.9 by 19.0 cm, Museum Boijmans Van Beuningen, Rotterdam

Rembrandt · Public domain · Source · ⁨출처⁩
Edgar Degas - Ballet (L'Étoile)

Edgar Degas · Public domain · Source · ⁨출처⁩
Rembrandt The Three Crosses 1653

Rembrandt · Public domain · Source · ⁨출처⁩

05 · Investigate: Inquiry and the Artistic Process

First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨출처⁩
Albrecht Dürer - Melencolia I - Google Art Project (427760)

Albrecht Dürer · Public domain · Source · ⁨출처⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨출처⁩

06 · Make: Practice, Experimentation, and Revision

Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨출처⁩
Da Vinci Vitruve Luc Viatour

Leonardo da Vinci · Public domain · Source · ⁨출처⁩
Cezanne Still Life with Apples a Bottle and a Milk Pot

Paul Cézanne · Public domain · Source · ⁨출처⁩

07 · Present: Communication and the AP Drawing Portfolio

Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨출처⁩
Artist studio

Studiotarekatoui · CC BY-SA 4.0 · Source · ⁨출처⁩
Albrecht Dürer - Praying Hands, 1508 - Google Art Project

Albrecht Dürer · Public domain · Source · ⁨출처⁩
First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨출처⁩

AP English Literature and Composition · ⁨AP 영어 문학 및 작문⁩

02 · Poetry I

Page of text with commentary and pointers in margins (NYPL b12455533-423678)

Scan by NYPL · Public domain · Source · ⁨출처⁩

AP Environmental Science · ⁨AP 환경 과학⁩

01 · The Living World: Ecosystems

Moore Reef underwater ReefScape

Holobionics · CC BY-SA 4.0 · Source · ⁨출처⁩
Palawan, Tropical jungle rainforest

Vyacheslav Argenberg · CC BY 4.0 · Source · ⁨출처⁩
Sossusvlei sand dunes

Winfried Bruenken (Amrum) · CC BY-SA 2.5 · Source · ⁨출처⁩

02 · The Living World: Biodiversity

Northwest Crown Fire Experiment

(Photograph used by permission of the USDA Forest Service.) · CC BY 2.5 · Source · ⁨출처⁩
Rock covered with multicolored patches of lichen

Tomascastelazo · CC BY-SA 4.0 · Source · ⁨출처⁩
Moore Reef underwater ReefScape

Holobionics · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Populations

African Elephant and calf (7513392380)

shankar s. from Dubai, united arab emirates · CC BY 2.0 · Source · ⁨출처⁩
European rabbit (Oryctolagus cuniculus) kitten

Alexis Lours · CC BY 2.0 · Source · ⁨출처⁩
A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)

NPS Photo · Public domain · Source · ⁨출처⁩
Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨출처⁩

04 · Earth Systems and Resources

Soil Profile Containing an Argillic Horizon

Cjrufe · CC0 · Source · ⁨출처⁩
001 Volcano eruption of Litli-Hrútur in Iceland in 2023 Photo by Giles Laurent

Giles Laurent · CC BY-SA 4.0 · Source · ⁨출처⁩
Soil Profile Containing an Argillic Horizon

Cjrufe · CC0 · Source · ⁨출처⁩
Sossusvlei sand dunes

Winfried Bruenken (Amrum) · CC BY-SA 2.5 · Source · ⁨출처⁩
00 1838 Iguazu Falls from the Brazilian side

W. Bulach · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Land and Water Use

Longsheng Rice Terraces November 2017 014

King of Hearts · CC BY-SA 4.0 · Source · ⁨출처⁩
2019 Bingham Canyon Mine 04

Farragutful · CC BY-SA 4.0 · Source · ⁨출처⁩
WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855

Tomas Sennett · Public domain · Source · ⁨출처⁩
Aerial view of suburban housing in Blacklick, Ohio, October 2024

Pi.1415926535 · CC BY-SA 4.0 · Source · ⁨출처⁩
SPRAYING PESTICIDES - NARA - 544246 (cropped)

John Messina · Public domain · Source · ⁨출처⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨출처⁩
Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496

Roger Kidd · CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Energy Resources and Consumption

TurowCoalMine

Petr Vodička · CC BY-SA 4.0 · Source · ⁨출처⁩
Olkiluoto 1&2

kallerna · Public domain · Source · ⁨출처⁩
Krafla power plant - Kröflustöð

Villy Fink Isaksen · CC BY-SA 4.0 · Source · ⁨출처⁩
Dülmen, Kirchspiel, Welte, Windräder -- 2010 -- 3519

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨출처⁩
Glen Canyon Dam 2013

Tuxyso · CC BY-SA 3.0 · Source · ⁨출처⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨출처⁩
Dülmen, Kirchspiel, Welte, Windräder -- 2010 -- 3519

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Atmospheric Pollution

Salt Lake City smog haze skyline 01

Eltiempo10 · CC BY-SA 4.0 · Source · ⁨출처⁩
Waldsterben am Falkenstein

Rosa-Maria Rinkl · CC BY 4.0 · Source · ⁨출처⁩
Chulla cookstove tamil nadu india

mckaysavage · CC BY 2.0 · Source · ⁨출처⁩

08 · Aquatic and Terrestrial Pollution

Detail of mangrove roots

Jonathan Wilkins · CC BY-SA 3.0 · Source · ⁨출처⁩
Pond covered in algae

Mijesty · CC BY-SA 4.0 · Source · ⁨출처⁩
Knott Landfill - Deschutes County, Oregon

Tequask · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · Global Change

Largest ever Ozone hole sept2000

NASA · Public domain · Source · ⁨출처⁩
Bleached colony of Acropora coral

Vardhanjp · CC BY-SA 4.0 · Source · ⁨출처⁩
Hubbard Glacier calving Alaska. (12027161386)

Bernard Spragg. NZ from Christchurch, New Zealand · CC0 · Source · ⁨출처⁩
Kudzu on trees in Atlanta, Georgia

Scott Ehardt · Public domain · Source · ⁨출처⁩
A coral reef on the Great Barrier Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨출처⁩
TurowCoalMine

Petr Vodička · CC BY-SA 4.0 · Source · ⁨출처⁩

AP European History · ⁨AP 유럽사⁩

01 · Renaissance and Exploration

Musée de l'imprimerie de Nantes - 075 - Presse à bras en bois, commandé par Gutenberg

Koreller · CC BY-SA 4.0 · Source · ⁨출처⁩
Type case with movable types for letterpress printing in the Gutenberg Museum, Mainz, Germany (48988492232)

dronepicr · CC BY 2.0 · Source · ⁨출처⁩

03 · Absolutism and Constitutionalism

Chateau Versailles Galerie des Glaces

Myrabella · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Industrialization and Its Effects

Mule MOSI Textile Hall 6410

Clem Rutter, Rochester, Kent · CC BY 3.0 · Source · ⁨출처⁩
Crystal Palace - interior

J. McNeven · Public domain · Source · ⁨출처⁩

08 · 20th-Century Global Conflicts

Cheshire Regiment trench Somme 1916

John Warwick Brooke · Public domain · Source · ⁨출처⁩

AP Human Geography · ⁨AP 인간지리학⁩

01 · Thinking Geographically

Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨출처⁩
Aerial view of suburban housing in Blacklick, Ohio, October 2024

Pi.1415926535 · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Population and Migration Patterns and Processes

Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨출처⁩
Hungarian Immigrants Cleveland

Hu Totya · Public domain · Source · ⁨출처⁩
Hungarian Immigrants Cleveland

Hu Totya · Public domain · Source · ⁨출처⁩

03 · Cultural Patterns and Processes

Seattle - Chinatown gate 01

Joe Mabel · CC BY-SA 3.0 · Source · ⁨출처⁩
SF Chinatown street sign Clay

Daniel Schwen · CC BY-SA 4.0 · Source · ⁨출처⁩
SF Chinatown street sign Clay

Daniel Schwen · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Political Patterns and Processes

Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨출처⁩
WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855

Tomas Sennett · Public domain · Source · ⁨출처⁩
Hong Kong skyline

victorgrigas · CC BY-SA 3.0 · Source · ⁨출처⁩
UN General Assembly hall

Patrick Gruban, cropped and downsampled by Pine · CC BY-SA 2.0 · Source · ⁨출처⁩
US-Mexico border fence

Office of Representative Phil Gingrey · Public domain · Source · ⁨출처⁩

05 · Agriculture and Rural Land-Use Patterns and Processes

Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522

Adrian Diack · CC BY-SA 2.0 · Source · ⁨출처⁩
Farmer using a hoe in a farm

Adesolive · CC BY-SA 4.0 · Source · ⁨출처⁩
Rows in a tea plantation

Adesolive · CC BY-SA 4.0 · Source · ⁨출처⁩
Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522

Adrian Diack · CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Cities and Urban Land-Use Patterns and Processes

Manhattan skyline from Upper New York Bay, 20231001 1041 0889

Jakub Hałun · CC BY 4.0 · Source · ⁨출처⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 02

Wilfredor · CC0 · Source · ⁨출처⁩
Tokyo Shibuya Scramble Crossing 2018-10-09

Benh LIEU SONG (Flickr) · CC BY-SA 2.0 · Source · ⁨출처⁩

07 · Industrial and Economic Development Patterns and Processes

Container ship NYK Themis at the Port of Los Angeles

Downtowngal · CC BY-SA 4.0 · Source · ⁨출처⁩
FANUC 6-axis welding robots

Phasmatisnox · CC BY 3.0 · Source · ⁨출처⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨출처⁩
Container ship NYK Themis at the Port of Los Angeles

Downtowngal · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Macroeconomics · ⁨AP 경제학 (거시)⁩

01 · Basic Economic Concepts

Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59

Jet6581 · CC BY-SA 3.0 · Source · ⁨출처⁩
DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨출처⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Economic Indicators and the Business Cycle

Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨출처⁩
Aisle in Daily Market Groceries Canberra City October 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · National Income and Price Determination

Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨출처⁩
Central Business District skyline, Singapore, at night

Andrew McMillan · Public domain · Source · ⁨출처⁩

04 · Financial Sector

Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨출처⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨출처⁩
Bank of England Building, London, UK - Diliff

Diliff · CC BY-SA 3.0 · Source · ⁨출처⁩

05 · Long-Run Consequences of Stabilization Policies

Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨출처⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨출처⁩
Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨출처⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨출처⁩

06 · Open Economy—International Trade and Finance

Currency Exchange - Moldova (by David Stanley)

D-Stanley · CC BY 2.0 · Source · ⁨출처⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Microeconomics · ⁨AP 경제학 (미시)⁩

01 · Basic Economic Concepts

Outdoor market fruit and vegetable stall Market Place Romford London 01

Acabashi · CC BY-SA 4.0 · Source · ⁨출처⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Supply and Demand

Fruit and vegetable stall at Southside Farmers Market November 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨출처⁩
DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Production, Cost, and the Perfect Competition Model

Robot arm picks up cylindrical objects in a factory setting

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩
ArcelorMittal steel plant on the Cuyahoga River

Roy Luck · CC BY 2.0 · Source · ⁨출처⁩

04 · Imperfect Competition

001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · Factor Markets

Garment factory in Bangladesh Women working

Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source · ⁨출처⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩

06 · Market Failure and the Role of Government

Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨출처⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨출처⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨출처⁩
Bielsko-Biała, ulica Warszawska, korek 02

Kamil Czaiński · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Physics 1 · ⁨AP 물리학 1⁩

01 · Kinematics

SNCF TGV Duplex Viaduc de Cize - Bolozon

Kabelleger / David Gubler (http://www.bahnbilder.ch) · CC BY-SA 3.0 · Source · ⁨출처⁩
Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Force and Translational Dynamics

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨출처⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Work, Energy, and Power

First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨출처⁩
00 1838 Iguazu Falls from the Brazilian side

W. Bulach · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Linear Momentum

Newton's Cradle

AntHolnes · CC BY-SA 3.0 · Source · ⁨출처⁩

05 · Torque and Rotational Dynamics

SpringHandExerciser

Simon Speed · Public domain · Source · ⁨출처⁩
Crash test car from the West Germany USA zone before 120278145 (cropped)

Kalispera Dell · CC BY 3.0 · Source · ⁨출처⁩

06 · Energy and Momentum of Rotating Systems

ISS Aug2005

NASA · Public domain · Source · ⁨출처⁩

07 · Oscillations

Tuning forks - Various frequencies

K.Venkataramana · CC0 · Source · ⁨출처⁩
SpringHandExerciser

Simon Speed · Public domain · Source · ⁨출처⁩

08 · Fluids

Barometer, aneroid (AM 2014.62.1-3)

Sharman D. Neill Ltd · CC BY 4.0 · Source · ⁨출처⁩
Hydraulic jacks 8655

SwarmCheng · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Physics 2 · ⁨AP 물리학 2⁩

09 · Thermodynamics

Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨출처⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨출처⁩

10 · Electric Force, Field, and Potential

Port and lighthouse overnight storm with lightning in Port-la-Nouvelle

Maxime Raynal from France · CC BY 2.0 · Source · ⁨출처⁩
Muller Van de Graaff generator demonstration

Drbaker171 at English Wikipedia · Public domain · Source · ⁨출처⁩

11 · Electric Circuits

ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨출처⁩
Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨출처⁩
Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨출처⁩

12 · Magnetism and Electromagnetism

Bar-magnet-iron-filings max

MikeRun, Vera Wurmsdobler · CC BY-SA 4.0 · Source · ⁨출처⁩
Aurora borealis over Eielson Air Force Base, Alaska

United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source · ⁨출처⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨출처⁩
Openstax college-physics 22.10 ironfilings-coil-magnet

OpenStax · CC BY 4.0 · Source · ⁨출처⁩

13 · Geometric Optics

Convex lens (magnifying glass) and upside-down image

AntanO · CC BY-SA 4.0 · Source · ⁨출처⁩
DispersionPrisme

Kilohn limahn · CC BY-SA 4.0 · Source · ⁨출처⁩

14 · Waves, Sound, and Physical Optics

Diffraction CD

Zykov S · CC BY 4.0 · Source · ⁨출처⁩
Two-point-interference-ripple-tank

The original uploader was RenamedUser2 at English Wikipedia · BSD · Source · ⁨출처⁩

15 · Modern Physics

Hydrogen spectrum visible

McZusatz (talk) · CC0 · Source · ⁨출처⁩
Particle Tracks in AWAN Expansion Cloud Chamber

Kebuk awan · CC BY-SA 4.0 · Source · ⁨출처⁩
De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)

Trougnouf · CC BY 4.0 · Source · ⁨출처⁩

AP Physics C: Electricity and Magnetism · ⁨AP 물리학 C: 전기 및 자기⁩

08 · Electric Charges, Fields, and Gauss's Law

OneTeslaTS DRSSTC Tesla Coil closeup

Original image: OneTesla Derived image: Chetvorno · CC BY-SA 4.0 · Source · ⁨출처⁩
Muller Van de Graaff generator demonstration

Drbaker171 at English Wikipedia · Public domain · Source · ⁨출처⁩

09 · Electric Potential

Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨출처⁩

10 · Conductors and Capacitors

Capacitors Various

Intiti · Public domain · Source · ⁨출처⁩
Electrolytic capacitors mounted on a circuit board

Giovanna 27 · CC BY 4.0 · Source · ⁨출처⁩

11 · Electric Circuits

ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨출처⁩
Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨출처⁩

12 · Magnetic Fields and Electromagnetism

Openstax college-physics 22.10 ironfilings-coil-magnet

OpenStax · CC BY 4.0 · Source · ⁨출처⁩
Aurora borealis over Eielson Air Force Base, Alaska

United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source · ⁨출처⁩

13 · Electromagnetic Induction

Electric Motor Rotor

Richard Wheeler (Zephyris) · CC BY-SA 3.0 · Source · ⁨출처⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨출처⁩

AP Physics C: Mechanics · ⁨AP 물리학 C: 역학⁩

01 · Kinematics

SNCF TGV Duplex Viaduc de Cize - Bolozon

Kabelleger / David Gubler (http://www.bahnbilder.ch) · CC BY-SA 3.0 · Source · ⁨출처⁩
Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Force and Translational Dynamics

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨출처⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Work, Energy, and Power

First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨출처⁩

04 · Linear Momentum

Newton's Cradle

AntHolnes · CC BY-SA 3.0 · Source · ⁨출처⁩

05 · Torque and Rotational Dynamics

Gear train

Robbie Sproule from Montreal, Canada · CC BY 2.0 · Source · ⁨출처⁩
Analytical beam balance - Upper part of high precision mechanical analytical scales

Sergei Golyshev · CC BY-SA 2.0 · Source · ⁨출처⁩

06 · Energy and Momentum of Rotating Systems

Kimmy Repond (born 18 October 2006), Swiss figure skater, at Art on Ice 2026 in Zurich. DSC05240

Skyscraper2010 · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Oscillations

Saint Isaac's Cathedral - Foucault pendulum in 1984

This photo is a scanned Reversal film (Slide) · CC BY-SA 4.0 · Source · ⁨출처⁩

AP Precalculus · ⁨AP 선미적수학⁩

01 · Polynomial and Rational Functions

Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨출처⁩
GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨출처⁩
Antena parabólica

Rjcastillo · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · Exponential and Logarithmic Functions

800metresOlympicTrials2020

jenaragon94 · CC BY 2.0 · Source · ⁨출처⁩
Matryoshka dolls - Bor local museum

Лапоть · CC0 · Source · ⁨출처⁩
EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨출처⁩

03 · Trigonometric and Polar Functions

Giant Ferris Wheel Vienna from W on 2010-09-20

Robert F. Tobler · CC BY-SA 4.0 · Source · ⁨출처⁩
International Space Station after undocking of STS-132

NASA/Crew of STS-132 · Public domain · Source · ⁨출처⁩

04 · Functions Involving Parameters, Vectors, and Matrices

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩
EllipticalOrbits

AstroOgier · CC0 · Source · ⁨출처⁩

AP Psychology · ⁨AP 심리학⁩

01 · Biological Bases of Behavior

Blausen 0111 BrainLobes

BruceBlaus. When using this image in external sources it can be cited as: Blausen.com staff (2014). "Medical gallery of Blausen Medical 2014". WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436 · CC BY 3.0 · Source · ⁨출처⁩
Wired up for a sleep study 02A

Joe Mabel · CC BY-SA 3.0 · Source · ⁨출처⁩

AP Statistics · ⁨AP 통계학⁩

03 · Collecting Data

Clinical trial

Fatemi.ebr · CC BY-SA 4.0 · Source · ⁨출처⁩
Dice (typical role playing game dice)

Stephantom · CC BY-SA 3.0 · Source · ⁨출처⁩
Amboy (California, USA), Hist. Route 66 -- 2012 -- 1

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Probability, Random Variables, and Probability Distributions

Ace playing cards

Enoch Lau · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Inference for Quantitative Data: Means

Dice (typical role playing game dice)

Stephantom · CC BY-SA 3.0 · Source · ⁨출처⁩

08 · Inference for Categorical Data: Chi-Square

OpenOffice.org Calc

http://hacktolive.org/ · LGPL · Source · ⁨출처⁩

09 · Inference for Quantitative Data: Slopes

Linear regression

Sewaqu · Public domain · Source · ⁨출처⁩
Residual plots for linear regression conditions

eXercise project · CC0 · Source · ⁨출처⁩

AP United States History · ⁨AP 미국사⁩

01 · Period 1: 1491-1607

Monks Mound - Summer 2024

Skubasteve834 · CC BY 4.0 · Source · ⁨출처⁩
Cliff Palace-Colorado-Mesa Verde NP

Tobi 87 · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Period 6: 1865-1898

Bessemer converter Blowing

Borvan53 · Public domain · Source · ⁨출처⁩

07 · Period 7: 1890-1945

Assembly line Ford T, 1923

Peter Elfelt · CC BY-SA 4.0 · Source · ⁨출처⁩
Dust bowl, Texas Panhandle, TX fsa.8b27276 edit

Arthur Rothstein · Public domain · Source · ⁨출처⁩

09 · Period 9: 1980-Present

Container Terminal Tollerort, Vorhafen, Hamburg (P1080405)

Matti Blume · CC BY-SA 4.0 · Source · ⁨출처⁩

AP World History: Modern · ⁨AP 세계사: 근현대⁩

01 · The Global Tapestry

Great-Zimbabwe-ruins-outer-walls-3-1200

Edwin Smith and Andrew Dale · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Networks of Exchange

Inhambane-dhow

—Steven G. Johnson · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Land-Based Empires

Mezquita de Solimán, Estambul, Turquía, 2024-09-28, DD 147-149 HDR

Diego Delso · CC BY-SA 4.0 · Source · ⁨출처⁩
Taj Mahal, Agra, India edit2

Yann; edited by King of Hearts · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Transoceanic Interconnections

Cerro Rico, Potosí, Bolivia

Jbmurray · CC BY-SA 4.0 · Source · ⁨출처⁩
Barcelona - Replica of Santa Maria Caravel

Unknown author · Public domain · Source · ⁨출처⁩

05 · Revolutions

Boulton & Watt steam engine, Sydney Powerhouse Museum, 2014 (15243331353)

David Maciulaitis from Auckland, New Zealand · CC BY 2.0 · Source · ⁨출처⁩

IGCSE Biology · ⁨IGCSE 생물학⁩

01 · Characteristics and classification of living organisms

E. coli bacteria (SEM)

NIAID · CC BY 2.0 · Source · ⁨출처⁩
Fly agaric mushroom

Onderwijsgek · CC BY-SA 3.0 nl · Source · ⁨출처⁩
Entomologie Hamburg

Hanse hiwi · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · Organisation of the organism

Onion epidermis cells (light micrograph, 40x)

loganrickert · CC BY 2.0 · Source · ⁨출처⁩
Compound light microscope

GcG(jawp) · Public domain · Source · ⁨출처⁩

03 · Movement into and out of cells

Plasmolysis in red onion cells

Trương Minh Khải · CC BY 4.0 · Source · ⁨출처⁩
Human blood

Olena Hohulia, Куцик Влада, Кремінь Валентина, Ivanchik Marya · CC BY 4.0 · Source · ⁨출처⁩

04 · Biological molecules

Potato starch grains (light micrograph)

MarekMiś · CC BY 4.0 · Source · ⁨출처⁩
Fresh made bread 05

FranHogan · CC BY-SA 4.0 · Source · ⁨출처⁩
Benedict precipitate 20211012 093950

HunterRSC · CC0 · Source · ⁨출처⁩

05 · Enzymes

Detergent - Persil Megaperls 02

Kritzolina · CC BY-SA 4.0 · Source · ⁨출처⁩
Kiwi (Actinidia chinensis) 1 Luc Viatour

Luc Viatour · CC BY-SA 2.5 · Source · ⁨출처⁩

06 · Plant nutrition

Stomata in a leaf (light micrograph, 400x)

ChrisInMilton · CC BY-SA 4.0 · Source · ⁨출처⁩
Sunlight on a green leaf (India, 2016)

Aurr123 · CC BY-SA 4.0 · Source · ⁨출처⁩
Chloroplasts in moss leaf cells (light micrograph)

Kristian Peters -- Fabelfroh · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Human nutrition

Types of teeth

http://www.scientificanimations.com/ · CC BY-SA 4.0 · Source · ⁨출처⁩
Fresh Vegetables display in Iloilo Terminal Public Market 06

OnlyJanz · CC BY-SA 4.0 · Source · ⁨출처⁩

08 · Transport in plants

Dicot stem cross-section (light micrograph)

User:Micropix · CC BY-SA 3.0 · Source · ⁨출처⁩
Tall oak by Myrstigen

W.carter · CC BY-SA 4.0 · Source · ⁨출처⁩

09 · Transport in animals

Blood cells (scanning electron micrograph)

Bruce Wetzel and Harry Schaefer (National Cancer Institute) · Public domain · Source · ⁨출처⁩
Dresden, Deutsches Hygiene-Museum, anatomisches Modell, Herz

Dguendel · CC BY 4.0 · Source · ⁨출처⁩

10 · Diseases and immunity

White blood cell engulfing bacteria

National Institutes of Health (NIH) · Public domain · Source · ⁨출처⁩
Mosquito (Ochlerotatus annulipes) and Midge (Culicoides impunctatus) biting human (me)

Dunpharlain · CC BY-SA 4.0 · Source · ⁨출처⁩

11 · Gas exchange in humans

3d model of lungs airways ribs

Eboelen (talk) (Uploads) · CC0 · Source · ⁨출처⁩
Respiratory system complete (en)

LadyofHats, Jmarchn · Public domain · Source · ⁨출처⁩

12 · Respiration

Finish of sprint running, 1992 Paralympics

Norman Bailey/Australian Paralympic Committee · CC BY-SA 3.0 · Source · ⁨출처⁩
Berlin-Marathon 2015 Runners 14

Denis Barthel · CC BY-SA 4.0 · Source · ⁨출처⁩

13 · Excretion in humans

Haemodialysis machine

Виталий Поспелов at ru.wikipedia · CC BY-SA 3.0 · Source · ⁨출처⁩
Kidney section vertical

Henry Vandyke Carter · Public domain · Source · ⁨출처⁩

14 · Coordination and response

Iris Macro, Eye close-up (11622304153)

Matt Ming from Beijing, China · CC BY 2.0 · Source · ⁨출처⁩
BrainLobesLabelled

Camazine · CC BY 3.0 · Source · ⁨출처⁩
Neuron - Nerve Cell 01

Doctor Jana · CC BY 4.0 · Source · ⁨출처⁩

15 · Drugs

Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨출처⁩
Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨출처⁩

16 · Reproduction

Pollen grains (SEM)

Asja Radja · CC BY 4.0 · Source · ⁨출처⁩
Lily flower: stamens and stigma

Subhrajyoti07 · CC BY-SA 4.0 · Source · ⁨출처⁩
A bee on a yellow flower

Iurie Nistor · CC0 · Source · ⁨출처⁩

17 · Inheritance

Human karyotype diagram showing autosomes and sex chromosomes - NHGRI

National Human Genome Research Institute (NHGRI) · Public domain · Source · ⁨출처⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨출처⁩

18 · Variation and selection

Peppered moth: dark (melanic) form

Chiswick Chap · CC BY-SA 3.0 · Source · ⁨출처⁩
Corner of Stockton and Jackson Street, crowd, San Francisco (April 2007)

Jennifer Woodard Maderazo · CC BY 2.0 · Source · ⁨출처⁩
Camel in Gobi Desert 01

Bernard Gagnon · CC0 · Source · ⁨출처⁩
20180124-OSEC-PJK-1132 TONED (39891696481)

U.S. Department of Agriculture Preston Keres/Office of Communications-Photography Services Center · Public domain · Source · ⁨출처⁩

19 · Organisms and their environment

Coral reef ecosystem

Jim E Maragos, U.S. Fish and Wildlife Service · Public domain · Source · ⁨출처⁩
African savanna elephants at Saadani National Park Tanzania

Rasheedhrasheed · CC BY-SA 4.0 · Source · ⁨출처⁩

20 · Human influences on ecosystems

004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
Deforested area, Goldisthal, 2023-05-20

Radomianin · CC BY-SA 4.0 · Source · ⁨출처⁩
Giant panda eating bamboo

Kevin Dooley · CC BY 2.0 · Source · ⁨출처⁩

21 · Biotechnology and genetic modification

Tanks at Green Leaf brewery

Ruth Hartnup from Vancouver, Canada · CC BY 2.0 · Source · ⁨출처⁩
Gel electrophoresis 2

Mnolf · CC BY-SA 3.0 · Source · ⁨출처⁩

IGCSE Business Studies · ⁨IGCSE 비즈니스 연구⁩

01 · Understanding business activity

Retail outlets, High Street - geograph.org.uk - 7644448

John Baker · CC BY-SA 2.0 · Source · ⁨출처⁩
Bonn, Post-Tower -- 2017 -- 2128 (bw)

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩

02 · People in business

Meeting British business representatives (5430620349)

Foreign and Commonwealth Office · OGL v1.0 · Source · ⁨출처⁩
Alpha Factory-Sewing Floor 80-90

Alan D Cirker · CC BY 3.0 · Source · ⁨출처⁩

03 · Marketing

A John Lewis Partnership shop window (8734849424)

Tyne & Wear Archives & Museums · No restrictions · Source · ⁨출처⁩
Times square at night

Rafi B. from Somewhere in Texas :) · CC BY 2.0 · Source · ⁨출처⁩

04 · Operations management

Assembly line

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
Daiwa Logistics Tosu Logistics Center

Peka · CC BY-SA 4.0 · Source · ⁨출처⁩
BMW Leipzig MEDIA 050719 Download Karosseriebau max

BMW Werk Leipzig · CC BY-SA 2.0 de · Source · ⁨출처⁩

05 · Financial information and decisions

Exterior of a modern Wells Fargo bank branch in Athens, Georgia 01

Harrison Keely · CC BY 4.0 · Source · ⁨출처⁩
Andrew Aziz

Bear Bull Traders · CC BY 2.0 · Source · ⁨출처⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨출처⁩

06 · External influences on business activity

Shipping containers at West Harbour in Jätkäsaari, Helsinki, Finland, 2008 October

Kari Hakli · CC BY-SA 4.0 · Source · ⁨출처⁩
Brayton Point Cooling Towers

Wikimaster97commons · CC BY-SA 3.0 · Source · ⁨출처⁩
Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨출처⁩

IGCSE Chemistry · ⁨IGCSE 화학⁩

01 · States of matter

Iodine subliming

Kate7234 · CC0 · Source · ⁨출처⁩
Ice cubes openphoto

Darren Hester · CC BY-SA 2.5 · Source · ⁨출처⁩
DryIceSublimation

Sarathtly · Public domain · Source · ⁨출처⁩

02 · Atoms, elements and compounds

Vanadium crystal bar and 1cm3 cube

Alchemist-hp (pse-mendelejew.de) · FAL · Source · ⁨출처⁩
Water-3D-balls-A

Ben Mills · Public domain · Source · ⁨출처⁩
Halit (NaCl) - Kopalnia soli Wieliczka, Polska

Lech Darski · CC BY-SA 4.0 · Source · ⁨출처⁩
Graphite found near Mautern

Kritzolina · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Stoichiometry

Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨출처⁩
Analytical balance mettler ae-260

US DEA · Public domain · Source · ⁨출처⁩

04 · Electrochemistry

Electrolysis of water

Rhetos · CC0 · Source · ⁨출처⁩
Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum

Mattes · CC BY-SA 3.0 · Source · ⁨출처⁩

05 · Chemical energetics

Campfires burning wood pits

Jon Sullivan · Public domain · Source · ⁨출처⁩
Bunsen burner flame types

Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source · ⁨출처⁩
Bunsen burner flame types

Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Chemical reactions

Rust on iron

Laitr Keiows · CC BY-SA 3.0 · Source · ⁨출처⁩
Potassium permanganate solutions 2

Leiem · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Acids, bases and salts

Copper sulphate (48723408188)

Auckland Museum Collections from Auckland, Aotearoa New Zealand · CC BY 2.0 · Source · ⁨출처⁩
Blue and red litmus paper

Meganbeckett27 · CC BY-SA 3.0 · Source · ⁨출처⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨출처⁩
Limestone Cliffs, Little Ormes Head - geograph.org.uk - 7808316

N Chadwick · CC BY-SA 2.0 · Source · ⁨출처⁩

08 · The Periodic Table

Potassium reacting with water

Tavoromann · CC BY-SA 3.0 · Source · ⁨출처⁩
Periodic table HMNS

Ed Uthman, Houston, Texas, USA · CC BY 3.0 · Source · ⁨출처⁩
Coloured-transition-metal-solutions

No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source · ⁨출처⁩
Edelgase in Entladungsroehren

Alchemist-hp www.pse-mendelejew.de · CC BY-SA 2.0 de · Source · ⁨출처⁩

09 · Metals

Rusted iron chain

MX1996 · CC BY-SA 4.0 · Source · ⁨출처⁩
Cathay Pacific A350-941 preparing to takeoff on runway 25L@HKG

BenYung0531 · CC BY-SA 4.0 · Source · ⁨출처⁩
Rusted top edge grey heavily worn deteriorating grubby grungy aged metal surface texture

Sisters.seamless · CC0 · Source · ⁨출처⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨출처⁩

10 · Chemistry of the environment

Inside a catalytic converter

Cyrogigabyte · CC0 · Source · ⁨출처⁩
Smog over Almaty

Igors Jefimovs · CC BY 3.0 · Source · ⁨출처⁩

11 · Organic chemistry

Anacortes Refinery 31911

Walter Siegmund (talk) · CC BY 2.5 · Source · ⁨출처⁩
004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩

12 · Experimental techniques and chemical analysis

Paper chromatography

Yuliiaoleksii · CC BY 4.0 · Source · ⁨출처⁩
Acid-base titration

Alina.Popova.26 · CC BY 4.0 · Source · ⁨출처⁩

IGCSE Computer Science · ⁨IGCSE 컴퓨터 과학⁩

01 · Data representation

Die (the 'heart') of a microprocessor Intel 80486 with 1.2 millions of transistors, ca. 1990

Thomy pc at German Wikipedia · Public domain · Source · ⁨출처⁩
Binary-code

Graph+sas · CC BY-SA 4.0 · Source · ⁨출처⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨출처⁩

02 · Data transmission

USB connectors

Techtonic · Public domain · Source · ⁨출처⁩
An Ethernet cable

No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source · ⁨출처⁩
Fiber optic illuminated

Hustvedt · CC BY-SA 3.0 · Source · ⁨출처⁩

03 · Hardware

Inside a hard disk drive

Zzubnik · Public domain · Source · ⁨출처⁩
A solid state drive

PantheraLeo1359531 · CC BY 4.0 · Source · ⁨출처⁩
An optical disc

· Public domain · Source · ⁨출처⁩
A USB flash drive

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨출처⁩
A magnetic tape cartridge

Mister rf · CC BY-SA 4.0 · Source · ⁨출처⁩
Logitech K120 USB keyboard

Logitech · Product image · Source · ⁨출처⁩
Logitech M100 optical mouse

Logitech · Product image · Source · ⁨출처⁩
Honeywell Voyager 1250g barcode scanner

Honeywell · Product image · Source · ⁨출처⁩
Epson Perfection V39 II flatbed scanner

Epson · Product image · Source · ⁨출처⁩
Brother HL-L2400D laser printer

Brother · Product image · Source · ⁨출처⁩
Bambu Lab X1 Carbon with AMS module (cropped)

Benlisquare · CC BY-SA 4.0 · Source · ⁨출처⁩
Canon PIXMA TS3520 inkjet printer

Canon · Product image · Source · ⁨출처⁩
Logitech Z313 computer speakers

Logitech · Product image · Source · ⁨출처⁩
Samsung 24-inch monitor

Samsung · Product image · Source · ⁨출처⁩
Logitech Yeti USB microphone

Logitech · Product image · Source · ⁨출처⁩
Logitech H390 headset

Logitech · Product image · Source · ⁨출처⁩
Samsung Galaxy Tab A9 tablet

Samsung · Product image · Source · ⁨출처⁩
Corsair Vengeance DDR5 RAM module

Corsair · Product image · Source · ⁨출처⁩
Intel CPU Core i7 6700K Skylake top

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨출처⁩
Electronic-Component-Screw-DC-Motor

Evan-Amos · Public domain · Source · ⁨출처⁩
AM2302 (DHT22) digital temperature and humidity sensor module

Suyash Dwivedi · CC BY-SA 4.0 · Source · ⁨출처⁩
Navigon Canada 310 - board-40222

Raimond Spekking · CC BY-SA 4.0 · Source · ⁨출처⁩
Nikon D850 digital single-lens reflex camera

G1MFG · CC BY-SA 4.0 · Source · ⁨출처⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨출처⁩
Netgear-Nighthawk-AC1900-WiFi-Router

Evan-Amos · Public domain · Source · ⁨출처⁩

04 · Software

Computer motherboard 6

Kurt Kaiser · CC0 · Source · ⁨출처⁩
Fedora 33 with its default desktop environment (GNOME 3.38) and background

GNOME · GPL · Source · ⁨출처⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨출처⁩

05 · The internet and its uses

A home Wi-Fi router

Evan-Amos · Public domain · Source · ⁨출처⁩
A data centre

BalticServers.com · CC BY-SA 3.0 · Source · ⁨출처⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Automated and emerging technologies

An industrial robot arm

Нечаева Лилия Александровна · CC BY-SA 4.0 · Source · ⁨출처⁩
A drone

Josh Sorenson · CC0 · Source · ⁨출처⁩
Mi Robot Vacuum

Popey900 · Copyrighted free use · Source · ⁨출처⁩
Waymo Jaguar I-Pace - Side View 01

9yz · CC BY 4.0 · Source · ⁨출처⁩

07 · Topic 07

programmer

hackNY · CC BY-SA 2.0 · Source · ⁨출처⁩

08 · Programming

Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨출처⁩
168 pin and 184 pin DIMM

Veeblefetzer · CC BY 4.0 · Source · ⁨출처⁩

09 · Databases

Schlagwortkatalog

Dr. Marcus Gossler · CC BY-SA 3.0 · Source · ⁨출처⁩
NOIRLab HQ Server Racks (6V6A0395-CC)

NOIRLab/NSF/AURA/T. Slovinský · CC BY 4.0 · Source · ⁨출처⁩

10 · Boolean logic

A logic gate chip

S. Kaba · Public domain · Source · ⁨출처⁩
ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨출처⁩

IGCSE Economics · ⁨IGCSE 경제학⁩

01 · The basic economic problem

DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨출처⁩
Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496

Roger Kidd · CC BY-SA 2.0 · Source · ⁨출처⁩

02 · The allocation of resources

Factory smoke in sunset - geograph.org.uk - 1769920

Nic Franklin-Woolley · CC BY-SA 2.0 · Source · ⁨출처⁩
Andrew Aziz

Bear Bull Traders · CC BY 2.0 · Source · ⁨출처⁩

03 · Microeconomic decision-makers

SPAR kolonial mat varehandel hyller (Supermarket interior GROCERY store aisle shelves) Frokostblandinger gryn müsli Axa frukt energi 4-korn blåbær (cereals muesli) etc Tjøme NORWAY 2023-08-31 IMG 1095

Wolfmann · CC BY-SA 4.0 · Source · ⁨출처⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩
08 Philippine peso PHP currency - banknotes and coins of Philippine money

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨출처⁩

04 · Government and the macroeconomy

People's Bank of China (2006-02-18)

Yongxinge (Wikimedia Commons) · CC BY-SA 3.0 · Source · ⁨출처⁩
Shanghai skyline waterfront pudong 5166168 69 70

Ermell · CC0 · Source · ⁨출처⁩
Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨출처⁩

05 · Economic development

Favelascape - Flickr - eflon

eflon from Ithaca, NY · CC BY 2.0 · Source · ⁨출처⁩
1 singapore city skyline dusk panorama 2011

chenisyuan · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · International trade and globalisation

Container port

H. Zell · CC BY-SA 3.0 · Source · ⁨출처⁩
Port bow view of the Russian merchant container ship CHITA underway. The ship has numerous commercial vehicles as deck cargo - DPLA - e120d3e0e4cf053032385cc8b2eca1fe

Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994 · Public domain · Source · ⁨출처⁩

IGCSE English · ⁨IGCSE 영어⁩

01 · Reading skills

Departure board at Geneva Airport

Tiia Monto · CC BY-SA 3.0 · Source · ⁨출처⁩
Close-up of a woman reading a book

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩

02 · Writing: purpose, audience and accuracy

Person writing in a notebook while sitting at a desk

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩

03 · Writing an informal email

Person writing in notebook while using laptop at a modern workspace

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩
Berkawan dalam kesukaan

Yaradina · CC BY-SA 4.0 · Source · ⁨출처⁩

04 · Writing a formal letter or email

Handwritten Letter of Resignation

CIPHR Connect · CC BY 2.0 · Source · ⁨출처⁩
Clean minimalist office (Unsplash)

Roman Bozhko romanbozhko · CC0 · Source · ⁨출처⁩

05 · Writing a report

Carlisle Indian School, Carlisle, Pa. Classroom debate by debating society LCCN2008675522

Johnston, Frances Benjamin, 1864-1952, photographer · Public domain · Source · ⁨출처⁩
Person writing in notebook while using laptop at a modern workspace

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩

06 · Writing an article

Front Page of 2025 Atmore Advance

JMMediaGroup1 · CC BY-SA 4.0 · Source · ⁨출처⁩
Newspapers on a newsstand

Maksym Kozlenko · CC BY-SA 4.0 · Source · ⁨출처⁩

07 · Writing a review

Theatre of young audience (16134553769)

Andrey Shalaev · CC BY 2.0 · Source · ⁨출처⁩
Earls Kitchen and Bar Miami Worldcenter Interior

KTamburello · CC BY 4.0 · Source · ⁨출처⁩

08 · Writing an essay

Rammohun Library and Free Reading Room - Rare Books Collection (1)

Sumitsurai · CC BY-SA 4.0 · Source · ⁨출처⁩
Person writing in a notebook while sitting at a desk

Shixart1985 · CC BY 2.0 · Source · ⁨출처⁩

09 · Listening skills

Radio WWOZ New Orleans studio October 2009 01

Infrogmation of New Orleans · CC BY-SA 4.0 · Source · ⁨출처⁩
Students of Mary Lauren Brown in conversation about Bullying

Foundation Digital Schools Liberia · CC0 · Source · ⁨출처⁩

10 · Speaking skills

Don Young speaking at Juneau-Douglas High School, 1972-1973 school year

Juneau-Douglas High School (or student class/group of the school), Juneau, Alaska · Public domain · Source · ⁨출처⁩
Students of Mary Lauren Brown in conversation about Bullying

Foundation Digital Schools Liberia · CC0 · Source · ⁨출처⁩

11 · Vocabulary and text types

Compact Oxford English Dictionary 2

Cullen328 · CC BY-SA 4.0 · Source · ⁨출처⁩

IGCSE Mathematics · ⁨IGCSE 수학⁩

01 · Number

Andromeda Galaxy (with h-alpha)

Adam Evans · CC BY 2.0 · Source · ⁨출처⁩
Sale sign in the shopping mall. Discount tag. Bangkok. (48087867208)

Artem Beliaikin from Moscow, Russia · CC BY 2.0 · Source · ⁨출처⁩

02 · Algebra and graphs

Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨출처⁩
Kangji Suspension Bridge under clear sky on 16 January 2015

Jason · CC BY 2.0 · Source · ⁨출처⁩

03 · Coordinate geometry

Sustenpass, Kanton Uri

Philipp Ramseier · CC BY-SA 4.0 · Source · ⁨출처⁩
2010-365-251 The Bronx aerial view (4972664239)

cogdogblog · CC BY 2.0 · Source · ⁨출처⁩

04 · Geometry

Symmetry of the Taj Mahal, Agra

Jonathan Freundlich · CC BY-SA 3.0 · Source · ⁨출처⁩
Matryoshka from Hungary

Wilfredor · CC0 · Source · ⁨출처⁩
Honeycomb - Flickr - Bistrosavage

Doug Bowman from DeKalb IL, USA · CC BY 2.0 · Source · ⁨출처⁩

05 · Mensuration

All Gizah Pyramids

Ricardo Liberato · CC BY-SA 2.0 · Source · ⁨출처⁩
Shipping container stacks - Port of Rotterdam - 2017 - 5

AgainErick · CC BY-SA 4.0 · Source · ⁨출처⁩

06 · Trigonometry

Tour Eiffel - 20150801 15h30 (10621)

Another one of my pictures: This photograph was taken by Medium69 (William Crochot) and released under the license stated below. You are free to use it for any purpose as long as you credit the author (William Crochot), the Source (Wikimedia Commons) and the license (CC-BY-SA 4.0) in close relation to the image. Please do not upload an updated image here without consultation with the Author. The author would like to make corrections only at his own source RAW. This ensures that the changes are preserved.Please if you think that any changes should be required, please inform the author.Otherwise you can upload a new image with a new name. Please use one of the templates derivative or extract · CC BY-SA 4.0 · Source · ⁨출처⁩
London Eye at sunset 2013-07-19

Bob Collowan · CC BY-SA 3.0 · Source · ⁨출처⁩

07 · Transformations and vectors

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨출처⁩
WLA vanda Tiles with repeat pattern

Wikipedia Loves Art participant "VeronikaB" · CC BY 2.5 · Source · ⁨출처⁩

08 · Probability

Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨출처⁩
Roulette wheel (5276348473)

Håkan Dahlström from Malmö, Sweden · CC BY 2.0 · Source · ⁨출처⁩

09 · Statistics

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨출처⁩
Crowd of People at Ridge, Shimla

Shimla Deities · CC BY 4.0 · Source · ⁨출처⁩

IGCSE Physics · ⁨IGCSE 물리학⁩

01 · Motion, forces and energy

Windmills D1-D4 (Thornton Bank)

Hans Hillewaert · CC BY-SA 4.0 · Source · ⁨출처⁩
Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨출처⁩
Hoover Dam, Nevada (Arizona-Nevada, USA), Staumauer -- 2012 -- 6102

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨출처⁩
Analytical balance mettler ae-260

US DEA · Public domain · Source · ⁨출처⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨출처⁩

02 · Thermal physics

Mano en el espectro visible y en el infrarrojo térmico

Amfeli · CC BY 4.0 · Source · ⁨출처⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨출처⁩
2023 Termometr kuchenny

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨출처⁩

03 · Waves

DispersionPrisme

Kilohn limahn · CC BY-SA 4.0 · Source · ⁨출처⁩
A bunch of optic fibres made of plastic

Amangeldyurazov · CC BY-SA 4.0 · Source · ⁨출처⁩
Convex lens (magnifying glass) and upside-down image

AntanO · CC BY-SA 4.0 · Source · ⁨출처⁩
USB microphone

Logitech · Product image · Source · ⁨출처⁩
Reflection of waves observed using a ripple tank.

Psgs123xyz (talk) (Uploads) · CC0 · Source · ⁨출처⁩

04 · Electricity and magnetism

Magnetic field pattern

Maciej J. Mrowinski · CC BY-SA 4.0 · Source · ⁨출처⁩
Pole mounted Transformer

Bidgee · CC BY 3.0 · Source · ⁨출처⁩
RCD Protection Consumer Dual Split-Load

Evry Electrical · CC BY 4.0 · Source · ⁨출처⁩
U.S. Department of Energy - Science - 271 031 001 (23897761873)

U.S. Department of Energy from United States · Public domain · Source · ⁨출처⁩
Logarex smart household electricity meter build year 2023

RobbieIanMorrison · CC BY 4.0 · Source · ⁨출처⁩
Commutator and brushes DC motor

Christian Kral · CC BY 4.0 · Source · ⁨출처⁩
Raitersaich SK DSC 0028

Simon Koopmann · CC BY-SA 3.0 de · Source · ⁨출처⁩
3 Resistors

Afrank99 · CC BY-SA 2.5 · Source · ⁨출처⁩

05 · Nuclear physics

Doel nuclear power plant

Ad Meskens · CC BY-SA 3.0 · Source · ⁨출처⁩
Capt. Candice Adams Ismirle waits to receive a radiation treatment Oct. 22, 2013, at Walter Reed National Military Medical Center in Bethesda, Md

Staff Sgt. Russ Scalf · Public domain · Source · ⁨출처⁩
Portable Geiger counter Berthold LB122-02

Lilly_M · CC BY-SA 3.0 · Source · ⁨출처⁩

06 · Space physics

The Sun

NASA/SDO (AIA) · Public domain · Source · ⁨출처⁩
Saturn

NASA / JPL / Space Science Institute · Public domain · Source · ⁨출처⁩
Jupiter

NASA Hubble · CC BY 2.0 · Source · ⁨출처⁩
Mars

ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA, CC BY-SA 3.0 IGO · CC BY-SA 3.0 igo · Source · ⁨출처⁩
Whirlpool Galaxy

NASA and European Space Agency · Public domain · Source · ⁨출처⁩
FullMoon2010

Gregory H. Revera · CC BY-SA 3.0 · Source · ⁨출처⁩
Laser Towards Milky Ways Centre

ESO/Yuri Beletsky (ybialets at eso.org) · CC BY 4.0 · Source · ⁨출처⁩
Oldest Light in the Universe (SVS30133)

NASA's Scientific Visualization Studio - Marit Jentoft-Nilsen, Global Science and Technology, Inc./Mark Malanoski · Public domain · Source · ⁨출처⁩
HL Tau protoplanetary disk

ALMA (ESO/NAOJ/NRAO) · CC BY 4.0 · Source · ⁨출처⁩
ISS Aug2005

NASA · Public domain · Source · ⁨출처⁩

English Grammar · A1 · ⁨영어 문법 · A1⁩

08 · Topic 08

Full English breakfast at the Chalet Cafe, Cowfold, West Sussex, England

Acabashi · CC BY-SA 4.0 · Source · ⁨출처⁩

English Grammar · A2 · ⁨영어 문법 · A2⁩

02 · Topic 02

Senior person reading a book indoors closeup

Nenad Stojkovic · CC BY 4.0 · Source · ⁨출처⁩

09 · Topic 09

DFC 2099 A bustling market stall piled high with bright green grapes and other fresh fruit as a vendor hands a bag to a customer - a colorful scene of everyday produce trade

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨출처⁩

Python Reference · ⁨Python 참고 자료⁩

16 · Computing concepts

Internet map 1024

The Opte Project · CC BY 2.5 · Source · ⁨출처⁩

Data sources · ⁨데이터 출처⁩

HSK vocabulary — English / Chinese trainer · ⁨HSK 어휘 — 영어/중국어 트레이너⁩

Word lists & pinyin: · ⁨단어 목록 & 병음:⁩ complete-hsk-vocabulary (MIT). Definitions from · ⁨정의 출처:⁩ CC-CEDICT, CC BY-SA 4.0.
Chinese Reading — news reader · ⁨중국어 리딩 — 뉴스 리더⁩

Per-word pinyin & English glosses from · ⁨단위별 병음 및 영어 번역은 다음에서:⁩ CC-CEDICT (CC BY-SA 4.0), segmented with · ⁨구분된 텍스트:⁩ jieba. Headlines & articles are fetched live from their news sources and shown for language learning; all rights remain with the original publishers. · ⁨헤드라인 및 기사는 실시간으로 뉴스 출처에서 가져와 언어 학습 목적으로 표시됩니다; 모든 저작권은 원 출판사에帰속됩니다.⁩

Simulations · ⁨시뮬레이션⁩

The interactive simulations linked from the Learn and Know pages are by PhET Interactive Simulations, University of Colorado Boulder, used under CC BY 4.0. · ⁨Learn 및 Know 페이지에 링크된 인터랙티브 시뮬레이션은 PhET Interactive Simulations, University of Colorado Boulder에서 제공하며 CC BY 4.0 라이선스로 사용되었습니다.⁩