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