Q5 of 22 Page 201

What are two forms of oxygen found in the atmosphere?

Two forms of oxygen found in the atmosphere are diatomic as Oxygen O2 and triatomic as Ozone O3.


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3

List any three human activities which could lead to an increase in carbon dioxide content of air.

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What is the greenhouse effect?

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Why is the atmosphere essential for life?

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Why is water essential for life?