What Is an Internal Combustion Engine?
What Is an Internal Combustion Engine? An internal combustion engine is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a...
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Why Doesn’t a Spider Get Caught in Its Own Web?
Why Doesn’t a Spider Get Caught in Its Own Web? Spiders build their webs to trap flies and other insects for food. An insect is unable to escape once it has become...
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How Is Food Digested?
How Is Food Digested? When you take a bite of food, saliva pours into your mouth from nearby glands and mixes with the food as you chew. When you swallow, the food...
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How Do Bees Make Honey?
How Do Bees Make Honey? When a honeybee visits a flower, it sucks up droplets of sweet nectar with its long hollow tongue called proboscis. The nectar goes into a...
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Why Do Cats like Catnip?
Cats are attracted to catnip because of its mint-like smell. Because of this, the plant is sometimes called “cat-mint.” Catnip is a fragrant member of the...
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