Physics

18 June, 07:28

How much oxygen is contained in the atmosphere?

A. 20%

B. 21%

C. 22%

D. 23%

User:

Clouds are made up of tiny droplets. What happens to the droplets when they are very heavy?

A. they create another cloud

B. they begin to evaporate

C. they stay in the cloud

D. they fall to earth as rain, precipitation

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