Vocabulary#9 The Outer Solar System

Comet:a ball of rock and ice that orbits the Sun.
S:Comets come from the outer fringes of the solar system.

Meteoroid:A small asteroid(rocky object that obit the Sun)which may be far out in the solar system or close to the Inner Planets.
S:Sometimes the meteroid collide with the atmosphere of a planet,such as Earth.

Meteor:A meteroid that enters Earth`s atmosphere and burns with a streak of light.
S:Sometimes a meteor burns completely.

Meteorite:Any part of a meteoroid that reaches Earth`s surface.
S:Meteorites are usually classified in three types.