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GCSE Biology · key term
A gas in the atmosphere that absorbs outgoing long-wavelength radiation and helps keep Earth warm.
Used by AQA and OCR
Specification 4.7.3.5 · Paper 2
Revise: Global WarmingEarth’s atmosphere contains greenhouse gases, including carbon dioxide, methane and water vapour. These gases help maintain temperatures high enough for life. However, levels of carbon dioxide and methane in the atmosphere are increasing, strengthening the warming effect and contributing to global warming.
Specification B6.1d · Paper 2 (Foundation), Paper 4 (Higher)
A gas that absorbs and re-emits infrared radiation, contributing to the warming of Earth’s atmosphere.
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