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