What Causes the Colors of Autumn Leaves?
What Causes the Colors of Autumn Leaves? Leaves contain a variety of colors – green, orange, yellow, and brown. But during the spring and summer, there is much...
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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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Why Do Tennis Balls Bounce?
Why Do Tennis Balls Bounce? Like many other types of balls, tennis balls have a hollow center filled with air. Like all gases, the air inside a ball moves around easily...
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