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Atmosphere

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Complete the sentences

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Atmosphere

Complete the sentences

SANDRA CABRERO SENDRA
1

dioxide methane Earth's billion ammonia volcanic

In the first years of history the Earth was really dry and there was intense activity which produced loads of carbon , water vapor and nitrogen , along with smaller amounts of and .

2

Venus Mars atmosphere

This meant that the early was mostly carbon dioxide much like the atmospheres of and today .

3

dioxide liquid seabed water carbon

As the vapor condensed into water though it formed the oceans and it allowed lots of the carbon from the atmosphere to dissolve in them where it could go on to form precipitates and then finally become sediments in the .

4

green synthesized photosynthesize billion billion atmosphere dioxide first

The next major change started about 2 . 7 years ago . Slowly at as algae began to appear but becoming more rapid as plants evolved over the following years . This is because both of these groups of organisms are able to and as you can see from this equation for photosynthesis this not only takes in carbon 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 oxygen levels are slowly built up eventually allowed more complex life like animals to evolve .