Greenhouse Gases (AQA GCSE Chemistry Combined Science): Flashcards

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Greenhouse Gases
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Role of greenhouse gases

Maintain temps warm enough to support life

Earth's avg temp with greenhouse effect

15C15^\circ C

Mercury's night temp (no greenhouse effect)

180C-180^\circ C

Type of radiation from Sun to Earth

Shortwave solar radiation

Type of radiation Earth emits

Longwave thermal radiation

What greenhouse gases do with longwave radiation

Absorb it, preventing escape into space

What greenhouse gases do after absorbing radiation

Re-radiate heat back to Earth's surface

Three main greenhouse gases

Carbon dioxide (CO2CO_2), water vapour (H2OH_2O), methane (CH4CH_4)

Main sources of carbon dioxide

Burning fossil fuels, deforestation, industrial processes

Most abundant greenhouse gas

Water vapour

Sources of methane emissions

Livestock, rice paddies, landfill decay

How human activities affect greenhouse effect

Amplify it to dangerous levels

Result of increased greenhouse gas emissions

Rising global temps and climate change

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