Question

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Answer 1

Answer:

Earth’s atmosphere is a mixture of nitrogen (79%), oxygen (20%), and a small fraction of carbon dioxide, water vapours and other gases. This makes the existence of life possible on Earth. However, the atmospheres on Venus and Mars mainly consist of carbon dioxide. The amount of carbon dioxide on these planets can range from 95% to 97%. This may be the reason, no life exists in these planets.

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Answer 2

Earth's atmosphere is a mixture of

nitrogen ( 79% ) , oxygen ( 20% ) , and a small fraction of carbon dioxide , water vapors and other gases .

However the atmosphere on Venus and Mars mainly consists of carbon dioxide . The amount of carbon dioxide on these plants can range from 95% to 97% ..

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