Mountain Puzzle

4. broken small pieces of rock
7. a layer of rocks in the ground
9. Metamorphic rocks are usually made fro magma that cooled on the surface or underground an example is granite
14. Igneous rocks are from magma that cooled on the surface and or underground
16. Was fireball earth, and nothing was solid
19. this is usually called subduction where some force deteriates the structure
20. for example a volcanic mountain happens when

1. Melting occurs when heat becomes too great for an object and the structure starts to fail under the heat
2. Start of photosynthetic bacteria and multicellular organisms appear in the fossil record
3. the surface of the Earth
5. a physical force that applies weight and usually causes physical strian
6. the center of the Earth filled with magma
8. This time period mainly marked the beginning of plate tectonics
10. Has the Cambrian explosion, basic vertebrates
11. molten material that forms all types of rocks
12. a crack in tectonic plates caused by pressure
13. for example techtonic mountains are made from techtonic plates that colided and one of the plates got pushed up creating a mountains
15. Sedimentary rocks are built of sediments that got layered
17. the second layer of the Earth
18. the remains of an organism preserved in petrified form