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what causes rain
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What Causes Rain?

What Causes Rain? You know that rain falls from clouds. Water is constantly evaporated from the earth’s surface by the warmth of the sun. Th

why do fish swim in schools
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Why Do Fish Swim in Schools?

Why Do Fish Swim in Schools? Fish form schools for protection from predators, schools containing hundreds or thousands of nearly identical f

what is fog
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What Is Fog?

Fog is a cloud that forms near the ground. Fog appears when the cold ground chills a warm breeze. The sudden cooling causes the moisture in