Planet Earth

3. Uppermost layer of the Earth that includes the crust, continents, and ocean basins.
5. Mercury, Venus, Earth and Mars make up these type of planets. They are closest to the Sun.
9. pieces of space debris. Chunks of rock and iron.
10. Part of a continent that extends out underneath the ocean
12. These planets are called gas giant planets, and are the furthest away from the sun.

1. The part of the Earth where life exists.
2. A thin layer of gases that surrounds the Earth
4. The water areas of the Earth, including oceans, lakes, rivers, and other bodies of water
6. made of icy dust particles are frozen gases, look like bright balls with long feathery tails
7. small, irregularly shaped, planet like object
8. are the largest objects in the solar system
11. A plausible general principle offered to explain observed facts.