Global warming: biological effects and evidence
הוצג| English | משמעות |
|---|---|
| greenhouse gas/ˈɡriːnhaʊs ɡæs/ | גז חממה |
| scientific consensus/saɪənˈtɪfɪk kənˈsensəs/ | פסגת מדע |
What would explain this observation?
- A warmer average climate does not mean every habitat changes identically or every species benefits. Biological effects depend on conditions and interactions.
Build the model
- Carbon dioxide and methane are greenhouse gases 温室气体.
- Increasing their atmospheric concentrations contributes to global warming.
- Changing temperature and rainfall can alter suitable habitats, species distributions, food availability and breeding timings.
- Some organisms gain suitable conditions while others lose them, and interactions may become mismatched.
- greenhouse gas: A gas contributing to retention of outgoing heat in the atmosphere.
- scientific consensus 科学共识: Broad agreement arising from assessment of accumulated scientific evidence.
Which distinction is appropriate?
רמת קושי 1/5 · 100 מטבעות + בונוס קטן בהשלמה הראשונה היום
Climate is the long-term statistical trend; weather is one day's state. A single cold day sits inside the noise and neither cancels nor confirms a 30-year trend.
Match each technical term to its precise meaning.
רמת קושי 2/5 · 140 מטבעות + בונוס קטן בהשלמה הראשונה היום
Use the definitions to distinguish related quantities and processes.
Choose evidence that can test it
- Scientific consensus on climate change draws on systematic reviews of many peer-reviewed publications, not one weather observation.
- Complex local outcomes can be uncertain or incomplete because interacting factors, future emissions and biological responses vary.
- Uncertainty about a particular population’s future does not erase the wider evidence for warming.
In the lab: Interpret supplied long-term temperature and biological records, distinguishing climate trends from short-term weather. Identify timescales, comparison methods and other possible causes of a local population change. Explain an impact through changed abiotic conditions or interdependence, with a limitation supported by the data.
Which two habits make the investigation or model in this case more defensible?
רמת קושי 2/5 · 140 מטבעות + בונוס קטן בהשלמה הראשונה היום
Stating the conditions and assumptions lets others repeat the work exactly, and recording the supporting evidence lets them check the conclusion. Hiding disagreeing results removes the evidence that could challenge a wrong conclusion, and one measurement can never establish a wider claim.
Work from known quantities
- Known: a fictional mean-temperature series rises from 12.0 to 13.2 °C over 30 years.
- Change = 1.2 °C; model average change = 0.04 °C/year.
- This arithmetic describes the supplied series, not a current global estimate or a claim that each year warmed uniformly.
- Percentage change in Celsius is not an appropriate substitute.
Your turn: A fictional average rises by 1.5 °C over 30 years. Find the mean annual change.
A fictional average rises by 1.5 °C over 30 years. Find the mean annual change.
רמת קושי 2/5 · 140 מטבעות + בונוס קטן בהשלמה הראשונה היום
The result is 0.05 °C/year. Known: average rises 1.5 degrees C over 30 years. Mean annual change = 1.5/30 = 0.05 degrees C per year. This describes the supplied series; real warming is not uniform year by year.
Check the conclusion and its limits
- One cold day does not disprove a long-term trend.
- A shift in a species range is not automatically an increase in biodiversity.
- A local correlation requires careful attribution, and a fictional classroom graph must not be presented as observed global climate data.
Not true: Uncertainty in one local impact means there is no wider climate evidence. Uncertainty about one local impact is normal in science and does not erase the independent global evidence - temperature records, ice loss, shifting ranges. One uncertain link does not break the chain.
- Carbon dioxide and methane are greenhouse gases.
- Scientific consensus on climate change draws on systematic reviews of many peer-reviewed publications, not one weather observation.
- Watch for: one cold day does not disprove a long-term trend.
Uncertainty about one local impact is normal in science and does not erase the independent global evidence - temperature records, ice loss, shifting ranges.
רמת קושי 1/5 · 100 מטבעות + בונוס קטן בהשלמה הראשונה היום
True. Uncertainty about one local impact is normal in science and does not erase the independent global evidence - temperature records, ice loss, shifting ranges. One uncertain link does not break the chain.
A gas contributing to retention of outgoing heat in the atmosphere: write the technical term.
רמת קושי 1/5 · 100 מטבעות + בונוס קטן בהשלמה הראשונה היום
greenhouse gas means A gas contributing to retention of outgoing heat in the atmosphere.