Across
- 3. broken down
- 5. when tectonic plates move away
- 7. When tectonic plates collide
- 8. accumulation of decomposed animal and plant remains
- 9. study of space
- 11. study of the ocean
- 15. rock that dissolves in water
- 16. Natural opening in the earth big enough for human exploration
- 17. study of weather
- 18. Unevenly Broken
- 19. Created by heat or pressure
- 20. The sideways or downward movement of a tectonic plate
Down
- 1. worn down
- 2. a sheen or soft glow
- 4. Icicle shaped rock hanging from cave
- 5. Laying down sediment carried by wind
- 6. study of rocks
- 10. a deposit of calcium carbonate
- 12. rocks composed of older or broken down rocks
- 13. a large mass of ice that moves slowly over land
- 14. made from decomposing plants
- 16. heat is transferred by movement of heated liquid