Across
- 2. The Earth's is a mixture of gases and small amounts of water vapor.
- 7. There are four of these one being the Earth
- 9. Between the orbits of two planets.
- 10. Made of gas, dust, and ice.
Down
- 1. Takes Earth about 24 hours.
- 3. Takes Earth 1 year.
- 4. 1 of these is the distance from the Earth to the Sun.
- 5. Helps keep Earth warm enough for life to exist.
- 6. The inner and outer core of the planets.
- 8. We have eight of them in our solar system.