Why Does Water Put out a Fire?
Why Does Water Put out a Fire? When a fireman squirts water on the burning wall of a building, he is putting the fire out in two ways. The water cools the burning...
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Do Fish Sleep?
Yes, fish do sleep. Because they have no eyelids, they cannot close their eyes, and it may look as though they never sleep. Many fish sleep by simply remaining very...
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How Does a Firefly Make Its Light?
How Does a Firefly Make Its Light? A firefly produces its light through a chemical process that takes place in an organ near the tip of its abdomen. The cold light is...
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How Can Fish Breathe in Water?
How can fish breathe in water? Fish breathe with gills, which are inside the fish’s head on each side of its throat. Some fish have as few as two gills in each...
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Why Do Astronauts Go on Spacewalks?
Why Do Astronauts Go on Spacewalks? Any time an astronaut gets out of a vehicle while in space, it is called a spacewalk. A spacewalk is also called an EVA. EVA stands...
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