1
Q
what gases were produced by volcanic activity that formed the early atmosphere?
A
Water vapour, Carbon dioxide, Sulfur dioxide, hydrogen sulphide and hydrogen.
2
Q
What was the main gas in the early atmosphere?
A
Nitrogen
3
Q
What were the other gases that made up the early atmosphere?
A
(Nitrogen) Carbon dioxide Water vapour methane ammonia
4
Q
How were the oceans formed?
A
The oceans were formed by the condensation of water vapour
5
Q
How did the CO2 levels drop and O2 levels rise?
A
Photosynthesising bacteria that took in CO2 and released O2.
6
Q
What type of rays does the sun emit?
A
Ultra violet (UV)
7
Q
What gases are absorbed by the earth from the sun?
A
Carbon dioxide, Methane and Water vapour
8
Q
Why are CO2 levels rising today?
A
Deforestaion and combustion of fossil fuels
Chemistry
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