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