Across
- 3. boundary/plates collide.
- 6. planes when exposed to stress, when being hit with a hammer.
- 7. with a predictable chemical composition.
- 11. from 250 million years ago.
- 13. zone/biggest smash-up on earth.
- 14. property of a mineral that measures resistance to scratching
- 15. rock material found inside earth.
- 16. property of a mineral that causes it to break into uneven pieces.
- 17. geologist.
Down
- 1. ridge/continuous system of twin mountain ranges with a Rift Valley between them that extends around earth on the seafloor.
- 2. while molten into cracks between layers of rocks.
- 4. to a wider gully or ditch.
- 5. the size and arrangement of rock components and can help indicate how a rock formed.
- 6. rock-forming process in which minerals precipitate out of water and fill the spaces between coasts.
- 8. boundary/plates moving apart
- 9. scientist.
- 10. fossilized seed ferm.
- 12. seafloor spreading.