Across
- 3. this where some force deteriorates the structure
- 4. a crack in tectonic plates caused by pressure
- 6. broken small pieces of rock
- 8. the surface of the Earth
- 10. molten material that forms all types of rocks
- 11. Was fireball earth, and nothing was solid
- 15. this process occurs when the heat becomes too great for an object and the structure starts to fail under the heat
- 16. Start of photosynthetic bacteria and multicellular organisms appear in the fossil record
- 18. the second layer of the Earth
- 19. Has the Cambrian explosion, basic vertebrates
Down
- 1. a physical force that applies weight and usually causes physical strian
- 2. for example a volcanic mountain happens when
- 4. the remains of an organism preserved in petrified form
- 5. these rocks are built of sediments that got layered
- 7. these rocks are usually made from magma that cooled on the surface or underground an example is granite
- 9. a layer of rocks in the ground
- 12. This time period mainly marked the beginning of plate tectonics
- 13. for example tectonic mountains are made from tectonic plates that colided and one of the plates got pushed up creating a mountains
- 14. the center of the Earth filled with magma
- 17. these rocks are from magma that cooled on the surface and or underground