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. The invisible water...
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How Does Popcorn Grow?
How Does Popcorn Grow? Popcorn is a special kind of corn with very small, hard kernels. Ears of the tightly-packed kernels grow on jointed cornstalks that resemble...
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Is Breathing Cold Air Dangerous?
Breathing cold air isn’t dangerous. Your body has special mechanisms in place to make sure that all the air that reaches your lungs is plenty warm and full of...
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Why Does a Dog Pant?
Why Does a Dog Pant? You have probably seen a dog panting on a hot day. When a dog becomes overheated, it sticks out its tongue and pants, or breathes heavily. Panting...
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What Are Clouds Made Of?
Clouds are made up of very tiny drops of water or tiny crystals of ice that float in the air. Clouds form when warm air, containing moisture evaporated from the...
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