C1 Topic 1: Atmosphere

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What was present in the early atmosphere?
Carbon Dioxide (CO2) and water vapour (H20)
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What was there a lot of in the early atmosphere?
Carbon dioxide (CO2)
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What formed the early atmosphere?
Volcanic activity
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What is present in today's atmosphere?
Nitrogen (N2), Oxygen (O2) and other gases (eg CO2, Argon etc.)
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What percentage of today's atmosphere is Nitrogen?
78%
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What percentage of the today's atmosphere is Oxygen?
21%
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What percentage of today's atmosphere are other gases?
1%
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What happened to the water vapour in the early atmosphere?
The earth cooled down (condensation occured) and the water vapour dropped onto the Earth and formed oceans
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Why was there a decrease of CO2 and an increase of O2 in today's atmosphere?
Photosynthesis in plants used up CO2 and gave out O2
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What is today's atmosphere affected by?
Human activity (eg deforestation and burning fuels)
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What has happened if there is ever a change of volume of 21%?
O2 has been used
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Why was there a decrease in CO2 in today's atmosphere?
The CO2 dissolved in the oceans when they were formed by the cooling of the earth
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Other cards in this set

Card 2

Front

What was there a lot of in the early atmosphere?

Back

Carbon dioxide (CO2)

Card 3

Front

What formed the early atmosphere?

Back

Preview of the front of card 3

Card 4

Front

What is present in today's atmosphere?

Back

Preview of the front of card 4

Card 5

Front

What percentage of today's atmosphere is Nitrogen?

Back

Preview of the front of card 5
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