How Does a Seed Become a New Plant?
How Does a Seed Become a New Plant? Inside the shell, or seed coat, of a seed are the tiny beginnings of the new plant, called the embryo. The embryo lies dormant until...
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What Is Humidity?
Humidity is the amount of moisture, or water vapor (water in the form of a gas) in the air around us. There is always some water vapor in the air. It evaporates from...
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Why Can Birds Fly?
Why Can Birds Fly? A bird’s body is specially built for flying. First of all, a bird has feathers and wings, and powerful muscles with which to flap them. Its...
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Why Can We See Our Breath on a Cold Day?
Why Can We See Our Breath on a Cold Day? When you exhale when it’s cold outside, the water vapor in your breath condenses into lots of tiny droplets of liquid...
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Why Do We See Lightning Before We Hear Thunder?
Why Do We See Lightning Before We Hear Thunder? Lightning usually reaches our eyes before thunder reaches our ears because light travels faster than sound. Light...
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