Across
- 1. _____ rock form when rocks are subjected to high heat
- 4. The outermost shell of Earth
- 5. The study of the origin and evolution of topographic features
- 7. _____ rock form from deposits of pre-existing rocks
- 11. Minerals containing silicon and oxygen
- 13. _____ processes are the forces that act on the surface of the earth
- 14. The very center of the Earth
- 15. Features on the Earth's surface
Down
- 2. The study of the physical features of an area
- 3. _____ rock form when hot, molten rock solidifies
- 6. The third layer of the Earth
- 8. Composed of mostly quartz and feldspar
- 9. An extrusive igneous rock
- 10. The layer between the crust and the core
- 12. _____ processes are the continuous movements of the Earth