Planets and Space Rocks - Review

2. _____ is a rocky mass up to several hundred kilometers wide that revolves around the Sun.
3. _____ is a small asteroid.
4. _____ is the closest to the Sun.
7. Meteoroids and asteroids are both relatively ___ bodies in the solar system.
9. _____ are pieces of a meteor that lands on Earth's surface.
11. A large spherical body that orbits a central star
13. Inner planets are smaller and ______.
14. As a comet orbits the Sun its tail becomes smaller and ___ bright each time it passes the Sun.

1. ___'s atmosphere is composed of helium, hydrogen, and other gases.
3. ____ form when a meteoroid hits Earth's atmosphere.
4. ______ is known as the "Red Planet" for its dusty red soil.
5. ____ is a frozen mass of different types of ice and dust orbiting the Sun.
6. Meteoroids and asteroids both are rocks in space that ___ the Sun.
8. Outer planets are _____ and are made up of gas or ice.
10. ____ is the only planet to have known liquid water.
12. Inner planets orbits around the Sun are shorter and take ___ time to complete.