Here's why:

* Meteoroids are small, rocky or metallic bodies that orbit the Sun.

* They range in size from a grain of sand to a boulder.

* When a meteoroid enters Earth's atmosphere, it burns up and creates a streak of light called a meteor (or shooting star).

* If a meteoroid is large enough to survive its fiery descent and hit the Earth's surface, it's called a meteorite.

Let me know if you have any other astronomy questions!