Across
- 4. fish live in this sphere
- 5. the layer of rock that forms Earth's outer surface or skin.
- 6. forces that erode mountains
- 7. a layer of molten metal and is liquid
- 8. the main source of energy that drives the Earth system
- 12. indirect evidence that geologists use to study the Earth.
- 13. a dense sphere of solid iron and nickel
Down
- 1. an erupting volcano
- 2. the crust that lies beneath the ocean
- 3. the layer of hot, solid material between the Earth's crust and core.
- 9. the sphere that contains humans
- 10. a coarse, light colored rock found in the continental crust.
- 11. the ability to do work