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History of the
atmosphere
- 450 Billion years ago
- Made of molten rocks and
minerals. Lots of volcanos
releasing CO2, H2O (g) and
N2.
- The earth cooled and the
steam fell as rain These
where topped up by
commets crashing into
the earth
- Mainly carbon dioxide
- The earth cooled and the
steam fell as rain These
where topped up by
commets crashing into
the earth
- Made of molten rocks and
minerals. Lots of volcanos
releasing CO2, H2O (g) and
N2.
- 3.4 billion
years ago
- Simple bacteria appeered which
was able to make food for its
self by breaking down other
chemicals
- Algae evolved
- Algae was able to use the suns
energy to carry out photosynthesis
and produced oxygen as a waste
product which slowly built up in the
atmosphear
- Algae was able to use the suns
energy to carry out photosynthesis
and produced oxygen as a waste
product which slowly built up in the
atmosphear
- Simple bacteria appeered which
was able to make food for its
self by breaking down other
chemicals
- 2 billion
years ago
- More plants evolved and with
rising leavels of oxygen so did
animal species
- The early
microorganisms died
out as they couldn't
cope with the high
leavels of oxygen
- More plants evolved and with
rising leavels of oxygen so did
animal species
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