Across
- 1. There are this many planets in our solar system
- 5. Where Earth can be found.
- 6. Earth has the perfect conditions to support this.
- 9. Contains oxygen need for life.
Down
- 2. Move below Earth's crust creating mountains.
- 3. The only planet with life.
- 4. The biggest necessity for life.
- 7. Earth's big brother and blocks space debris.
- 8. Cooled to become Earth's crust
- 10. The center of the solar system.