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