Across
- 1. the force that pulls an object downward toward the center of the Earth.
- 3. the unit for mass
- 5. short period comets are generated from this region.
- 6. a ball of ice and dust that orbits the sun
- 8. Earth's 24 hour spin on it axis causing night and day.
- 11. the pull of gravity on an object
- 13. is a small rocky object that orbits the Sun.
- 14. the amount of matter that makes up the object
- 15. center of the universe
Down
- 2. terrestrial plantes that are small and rocky and are located closer to the Sun
- 4. Earth's 365 day long journey around the sun.
- 7. a streak of light in the sky that appears when a meteoroid burns up upon entering Earth's atmosphere.
- 9. the unit for weight
- 10. long long-period comets are generated from this region.
- 12. are large planets and have deep massive gaseous atmospheres