Temperature Balances (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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What happens to Sun's energy at Earth?
What happens to Sun's energy at Earth?
Mostly absorbed by atmosphere, some reflected
What determines Earth's temperature?
What determines Earth's temperature?
Amount of energy re-radiated and absorbed
How much incoming solar radiation reaches Earth?
How much incoming solar radiation reaches Earth?
Watts per m
How much outgoing solar radiation is reflected?
How much outgoing solar radiation is reflected?
Watts per m
How much outgoing infrared radiation is emitted?
How much outgoing infrared radiation is emitted?
Watts per m
Fraction of solar radiation absorbed by Earth's surface
Fraction of solar radiation absorbed by Earth's surface
About half
What is radiation converted to at Earth's surface?
What is radiation converted to at Earth's surface?
Heat energy
Type of radiation emitted from Earth's surface
Type of radiation emitted from Earth's surface
Longwave (infrared) radiation
What absorbs & re-emits IR in the atmosphere?
What absorbs & re-emits IR in the atmosphere?
Greenhouse gas molecules
Role of atmosphere in Earth's temperature
Role of atmosphere in Earth's temperature
Keeps Earth at constant temperature
What reflects some solar radiation?
What reflects some solar radiation?
Atmosphere and Earth's surface
What happens to some infrared radiation?
What happens to some infrared radiation?
Passes through atmosphere into space