Ever Changing Earth

How much of the Earth's atmosphere is argon (+other noble gases)?
1% (0.9)
1 of 10
Which gas makes up 78% of the atmosphere?
Nitrogen
2 of 10
How much of the Earths atmosphere is oxygen?
21%
3 of 10
Which gas makes up 0.04% of the atmosphere?
Carbon Dioxide
4 of 10
Which gases made up the early atmosphere and where did they come from?
Carbon dioxide, ammonia and water vapour from volcanoes
5 of 10
Why did the oceans form?
The Earth's temperature dropped and water vapour condensed
6 of 10
Why did oxygen levels increase?
Bacteria began photosynthesising and producing oxygen
7 of 10
Why did carbon dioxide levels decrease?
It dissolved in oceans, became trapped in fossil fuels and was used in photosynthesis
8 of 10
By which three processes can carbon dioxide levels be added to and removed from the atmosphere?
Respiration (produced as a waste product), Combustion (produced), photosynthesis (reacts with water)
9 of 10
How does acid rain form?
Sulphur dioxide is released from factories and reacts with rain to form sulphuric acid
10 of 10

Other cards in this set

Card 2

Front

Which gas makes up 78% of the atmosphere?

Back

Nitrogen

Card 3

Front

How much of the Earths atmosphere is oxygen?

Back

Preview of the front of card 3

Card 4

Front

Which gas makes up 0.04% of the atmosphere?

Back

Preview of the front of card 4

Card 5

Front

Which gases made up the early atmosphere and where did they come from?

Back

Preview of the front of card 5
View more cards

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