earths vocabulary

2. sudden events that led to mass extinction.
3. hot material rises, cooler materials sink. it dives plate tectonics.
5. extinction events that occur over a larger time period.
7. fractures or zones of weakness in earths crust.
9. formed at plate boundaries usually when plates collide.
13. forms after weathering and erosion when sediments compact and cement.
15. where tectonic plates slide past each other causes earthquakes.
16. the semi-fluids layer of the mantle where convection currents happen.
18. formed as a result of high temperature and pressure deep within earth charging a rock that already existed.
20. boundary tectonic plates move toward each other, usually form mountains and volcanoes.
21. tectonic plates move away from each other, usually forms new crust and rift valleys

1. located between the mantle and the outer core.
4. rock formed when lava of magma cools and hardens.
6. large, riged pieces of the earths lithosphere that moves and interact with each other along plate boundaries.
8. deep elongated deprssions in the ocean often associated with subduction zones
10. new oceanic crust is formed as tectonic plates pull apart and magma rises.
11. instrument used to measure and record seismic waves.
12. a group of the same species living in the same area.
14. an opening in earths crest through which molten rock is pushed out and creates new rock.
17. includes the crust and upper part of the mantle, and divided into tectonic plates.
19. name of the ancient supercontinent when it was all one landmass.