C1

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What gasses are the earth made up of?
Nitrogen,Oxygen,Argon,small amount ofCo2
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Proportion of nitrogen oxygen and argon
N=78% , O=21% and A=1%
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How was the earths atmosphere formed?
Earth’s early atmosphere was probably formed by volcanic activity
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d
d
4 of 5
d
d
5 of 5

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Card 2

Front

Proportion of nitrogen oxygen and argon

Back

N=78% , O=21% and A=1%

Card 3

Front

How was the earths atmosphere formed?

Back

Preview of the front of card 3

Card 4

Front

d

Back

Preview of the front of card 4

Card 5

Front

d

Back

Preview of the front of card 5

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