Across
- 5. These planets are also known as gas giants
- 6. When the moon is fully lit from Earth's view
- 7. The law of superposition helps scientists find the ____ age of rocks
- 8. The season in the Northern hemisphere when it is pointed toward the sun
- 10. The type of eclipse when the Earth blocks the sun's light from reaching the moon
- 15. To spin on an axis
- 16. To move around another object
Down
- 1. Only _____ planets have a true surface
- 2. Gravity makes matter clump together to form ____, rocks, and planets
- 3. The _____ layers of rock are at the bottom in undisturbed layers of rock
- 4. The remains or impressions of ancient organisms preserved in rock
- 9. Why seasons occur
- 11. The force that keeps the planets in orbit around the sun
- 12. When the moon is fully darkened from Earth's view
- 13. The type of eclipse when the moon blocks the sun's light from reaching Earth light from reaching a part of Earth
- 14. ____ fossils are used to define and identify geologic periods.
