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