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