C9: THE ATMOSPHERE

Question 1

What % of the atmosphere does nitrogen make up?

Answer 1

78%

Question 2

What % of the atmosphere does oxygen make up?

Answer 2

21%

Question 3

What gases make up ~1% of the atmosphere?

Answer 3

-argon
-CO2
-methane
-water vapour

Question 4

History of the atmosphere

Answer 4

1:
-volcanoes erupt and release CO2, N2, water vapour, methane and ammonia
2:
-earth cools down
-water vapour condenses and forms oceans
3:
-CO2 dissolves into oceans
-CO2 forms carbonate rock
4:
-algae and plants use CO2 for photosynthesis and release O2