Across
- 7. When two objects circle around each other
- 8. The inner four planets in the solar system
- 10. When you are unable to see the moon
- 11. Fossils that are widespread, easily recognizable, and short lived
- 13. This is how we know that when a rock layer is on top, it's the youngest
- 14. The overall weight of an object
- 16. This is the main reason we have seasons
Down
- 1. Anything that is living
- 2. When an object spins on its axis
- 3. The part of Earth above the Equator
- 4. Layers of rock that build up over time
- 5. The outer four planets in the solar system
- 6. When the moon is fully illuminated
- 9. The Earth's shadow falls onto the moon
- 12. When the sun is covered by the moon
- 15. The length between two objects