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What affects the size of craters formed by falling objects? Research A meteor is a small body that orbits around the sun. They sometimes enter the earth's atmosphere and burn up, due to the friction between the body and atmosphere and hits the earths surface. When they hit the earth's surface they are called meteorites. In Arizona, USA, a crater was formed by a large meteorite; scientists estimate it hit the earths about 500.000 years ago. A meteorite could also explain the extinction of the dinosaurs, when it hit the Gulf of Mexico. Some meteorites have dense lumps of iron and nickel, which show marks of slow cooling; these may have come from the violent history of our solar system. Hypothesis Energy is never created or destroyed; it is just transferred from one form to another. This is the principle of the conservation of energy. In my experiment there are different factors...

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