Sagot :
Meteoroid when its still orbits the sun. Once it already entered and burned up in the earth's atmosphere it will be called meteor. Once it already landed and impact the earth's surface it will be called a meteorite.
Most meteors result from meteoroids no more than a few centimeters in diameter. A larger meteoroid which survives the fiery passage through the Earth's atmosphere as a meteor and strikes the Earth's surface is called a meteorite.