Earth's Atmosphere

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Where did the gases in the Earth's early atmosphere come from?
Volcanoes
1 of 10
Name 4 gases that came out of the volcanoes
Carbon dioxide, nitrogen, ammonia, methane
2 of 10
What was released by the volcanoes that life could not exist without?
Water vapour
3 of 10
How were the oceans formed?
Hot water vapour cooled and condensed, it rained and the oceans were formed
4 of 10
How did the levels of carbon dioxide drop?
Tint plants started to photosynthesise, taking in carbon dioxide and releasing oxygen. Carbon dioxide dissolved into the sea and was used by marine creatures to make shells
5 of 10
What is the name of the compound that shells are made of?
Calcium carbonate
6 of 10
How do plants affect the levels of gases in the atmosphere?
Carbon dioxide levels drop as plants take it in and oxygen levels rise as they release it as a product of photosynthesis
7 of 10
What are the 4 main gases in today's atmosphere and their percentages?
Nitrogen 78%, Oxygen 21%, Carbon dioxide 0.04%, Argon 0.9%
8 of 10
Name 2 processes that affect the level of carbon dioxide in today's atmosphere
Deforestation and combustion
9 of 10
Which gas do cattle produce?
Methane
10 of 10

Other cards in this set

Card 2

Front

Name 4 gases that came out of the volcanoes

Back

Carbon dioxide, nitrogen, ammonia, methane

Card 3

Front

What was released by the volcanoes that life could not exist without?

Back

Preview of the front of card 3

Card 4

Front

How were the oceans formed?

Back

Preview of the front of card 4

Card 5

Front

How did the levels of carbon dioxide drop?

Back

Preview of the front of card 5
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