When meteors enter Earth's atmosphere and reach Earth's surface, they are known as meteorites .
Most meteors burn up in space before they reach Earth.
Some meteors have fallen to Earth and made large holes. A meteor crater in Arizona was created by a meteorite that may have struck Earth about 49,000 years ago. The Barringer Meteor Crater near Winslow, Arizona is 1.2 kilometers across and 200 meters deep.