Across
- 3. forms after weathering and erosion when sediments compact and cement
- 4. large rigid pieces of the earths lithosphere that move and interact with each other along plate boundaries
- 7. tectonic plates move toward each other usually forms mountains and volcanoes
- 8. formed as a result of high temperature and pressure deep within the earth changing rock that already exists
- 11. name of ancient super continent when it was all one land mass
- 12. an opening in the earths crust through which molten rock is pushed out and creates new rock
- 17. sudden event that led to mass extinction
- 19. hot material rises cooler materials sink it drives plate tectonics
- 21. instruments used to measure and record seismic waves
Down
- 1. the semi fluid layer of the mantle where convection currents happen
- 2. tectonic plates move away from each other usually forms new crust and rift valleys
- 5. formed at plate boundaries usually when plates collide
- 6. where tectonic plates slide past each other causes earth quakes
- 9. a group of the same species living in the same area
- 10. extinction events that occur over a longer time period
- 13. located between the mantle and the outer core
- 14. deep elongated depressions in the ocean often associated with subduction zones
- 15. new oceanic crust is formedas techtonic plates pull apart and magma rises
- 16. fractures or zones of weakness in the earths crust
- 18. includes the crust and upper part of the mantle and is divided into tectonic plates
- 20. rock formed when lava or magma cools and hardens