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