vocab list
Across
- 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
Down
- 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