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A meteoroid is a small piece of rock or metal that has broken off a larger object. Meteoroids can come from asteroids, comets, moons, or planets. Most meteoroids are smaller than a grain of sand and irregular in shape.
When a meteoroid or small asteroid enters Earth's atmosphere, it heats up as it collides with air molecules. As it falls toward Earth, it becomes a glowing streak or fireball called a
meteor.
Meteors are also called shooting stars.
Sometimes, a meteor falls without completely burning up or exploding. The remaining rock is called a
meteorite.
Meteorites may have small pits, and some contain crystals. Most meteorites found on Earth are less than 1 meter in diameter, though some as large as 3 meters have been discovered. Regardless of size, most meteorites are found in remote locations like deserts or ice sheets. Some meteorites have even been found on Mars and the Moon!
Select the true statements about meteoroids, meteors, and meteorites in the solar system.
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