Global warming: biological effects and evidence
| English | Español |
|---|---|
| greenhouse gas/ˈɡriːnhaʊs ɡæs/ | greenhouse gas |
| scientific consensus/saɪənˈtɪfɪk kənˈsensəs/ | scientific consensus |
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.
- Start with a prediction. State the quantities or features you would compare, then decide what evidence could distinguish two explanations.
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?
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.
Match each technical term to its precise meaning.
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.
- 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?
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.
Work from known quantities
- State the known values and their units. Choose the relation because its assumptions fit this case, then rearrange before substitution.
- 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.
A fictional average rises by 1.5 °C over 30 years. Find the mean annual change. Use the same sequence: known quantities → model → relation → substitution → unit and interpretation.
A fictional average rises by 1.5 °C over 30 years. Find the mean annual change.
The result is 0.05 °C/year. 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.
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.
- Return to the original observation. Explain what the result supports, which conditions it assumes, and one way to test a competing explanation.
Uncertainty in one local impact means there is no wider climate evidence. This claim is false: 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.
Global warming: biological effects and evidence: 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.
Uncertainty in one local impact means there is no wider climate evidence.
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.
A gas contributing to retention of outgoing heat in the atmosphere: write the technical term.
greenhouse gas means A gas contributing to retention of outgoing heat in the atmosphere.