Across
- 2. the force that keeps things from floating away into space
- 5. the amount of mass in an object per unit volume
- 7. the thickest layer of earth
- 8. the center of earth
- 10. the ridged shell of earth
- 11. all living things
Down
- 1. created billions of years ago, and the hardest substance on earth
- 3. frozen water on earth
- 4. all water on earth
- 6. layer of gasses surrounding Earth
- 8. the thinnest layer of earth
- 9. earth's solid body