Where Does the Wax Go When a Candle Burns?
Where Does the Wax Go When a Candle Burns? The wax that doesn’t drip down the side of a burning candle turns into a gas that produces the bright flame. When the...
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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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Who Steers a Train?
Believe it or not, nobody steers a train. The wheels of a train and its rails work together to steer the train. The wheels of a train have a special shape. Each one has...
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What Causes the Change of Seasons?
What Causes the Change of Seasons? The movement of the Earth around the sun causes the seasons. The Earth is tipped slightly as it moves along its path around the sun....
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What Are Food Calories?
What Are Food Calories? Food calories are the units we use in measuring the energy values of different foods. The foods that we eat furnish the heat and energy we need...
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