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Atmosphere

Compléter

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SONJA TISCHLER KARPOVA
SONJA TISCHLER KARPOVA
Spain

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Atmosphere

For kids

SONJA TISCHLER KARPOVA
1

millions vapor Earth's methane oxygen animals synthesized oceans atmosphere atmosphere layers sediments nitrogen atmosphere algae photosynthesis Venus plants water

1 In the first billion years of history the Earth was really dry and there was intense volcanic activity which produced loads of carbon dioxide , water and , along with smaller amounts of and ammonia .
This meant that the early was mostly carbon dioxide much like the atmospheres of Mars and today .
2 As the water vapor condensed into liquid though it formed the and it allowed lots of the carbon dioxide from the atmosphere to dissolve in them where it could go on to form carbon precipitates and then finally become in the seabed .
3 The next major change started about 2 . 7 billion years ago . Slowly at first as algae began to appear but becoming more rapid as green evolved over the following billion years . This is because both of these groups of organisms are able to photosynthesize and as you can see from this equation for this not only takes in carbon dioxide but also produces oxygen . So as our giant plants have further over the past couple of billion years the amount of carbon dioxide the has slowly declined , while levels are slowly built up eventually allowed more complex life like to evolve .
4 Now including plants could only hold a relatively small amount of carbon in their bodies . When they died though they fell to the seabed and became buried in of sediment . And over of years this sediment became compressed from sedimentary rock , oil and gas which trapped the carbon to stop it from getting back into the .

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