What Is Gravity?
When you toss a ball into the air, it comes down because it is pulled to earth by gravity. Gravity is a force that pulls all things on the earth toward the...
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What Makes Waves in the Ocean?
What Makes Waves in the Ocean? Most waves in the ocean are caused by the wind. Somewhere, far out at sea, wind ruffles the surface of the water. Ripples form and grow...
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