What Makes a Fire Smoke?
What Makes a Fire Smoke? The smoke that rises from a chimney or a bonfire is made chiefly of gases that are produced when the fuel burns. Most of the gases in wood...
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Why Do You Shiver When You Are Cold?
Why Do You Shiver When You Are Cold? When your body gets cold you can help it warm up by doing some kind of exercise. If you do not do that, your body has its own...
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What Makes Geysers?
Geysers are steam explosions of a spring from which water and steam is ejected forcefully into the air at heights ranging from less than a few feet to over several...
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How Does Frost Harm Plants?
How Does Frost Harm Plants? On cold winter mornings, feathery designs of ice may form on windowpanes and blades of grass. These icy crystals are frost. Frost kills...
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How Do Clouds Change Shape?
How Do Clouds Change Shape? Clouds are made mostly of tiny droplets of water floating about on currents of air. On a windy day, the air currents may stretch a cloud out...
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