vocab list

2. where tectonic plates slide past each other. causes earthquakes
5. the semi-fluid layer of the mantle where convection currents happen
7. rock formed when magma or lava cools or hardens
10. sudden events that led to a mass extinction
13. includes the crust and upper part of the mantle, and is divided into tectonics plates
14. a group of the same species living in the same area
16. fractures or zones of weakness in the earths crust
17. instruments used to measure and record seismic waves
20. tectonic plates move away from each other, usually forms new crust and rift valleys
21. tectonic plates move toward each other, usually forms mountains and volcanoes

1. extinction events that occur over a longer time period
3. formed as a result of high tempature and pressuredeep within earth changing a rock that already existed
4. located between the mantle and the outer core
6. deep, elongated depressions in the ocean, often associated with subduction zones
8. forms after weathering and erosion when sediments compact and cement
9. hot material rises, cooler materials sink. it drivesplate tectonics
11. large, rigid pieces of the earths lithoshpere that move and interact with each other along plate boundaries
12. an opening int eh earths crust through which molten rock is puched out and creates new rock
15. new oceanic crust is formed as tectonic plates pull part and magma rises
18. formed at plate boundaries usually when plates collide
19. name of the ancient supercontinent when it was all one landmass