How Does a Car Engine Work?
How Does a Car Engine Work? A car engine works by burning a mixture of gasoline and air inside a cylinder. When the engine is turned on, gasoline first goes into a...
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Why Is the Pipe under the Sink Curved?
Why Is the Pipe under the Sink Curved? The U-shaped pipe under a sink is called a water trap. Every sink, toilet, and bathtub in your house has one. When you pull the...
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Why Do We Yawn?
Why Do We Yawn? Though we don’t know all the reasons for yawning, it is usually a way of helping our breathing. That extra deep breath gets oxygen into our...
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Why Do We See Snow on High Mountains During Summer?
Why Do We See Snow on High Mountains During Summer? We often see snow on high mountaintops during the summer because the temperature never gets warm enough for all the...
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What Causes Thunder?
What Causes Thunder? Thunder is caused by lightning. During a thunderstorm, electrical charges build up in the clouds. When a charge becomes strong enough, there is a...
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