Across
- 3. specific type of metal
- 6. amount of mass, or substance, in a material
- 10. all living organisms on Earth
- 11. plastic, flowing layer within the mantle
- 12. outer part of Earth's magnetic field
- 14. liquid water on Earth
- 15. rocky, outermost layer of Earth
Down
- 1. Earth's dense, metallic center
- 2. thick middle layer in the solid part of Earth
- 4. frozen water on Earth
- 5. layer of gasses surrounding Earth
- 7. a shape like a ball
- 8. the solid part of Earth, including the soil and Earth's rocky center
- 9. rigid layer that includes the crust and uppermost mantle
- 13. force of attraction between every object and every other object that exists because of mass