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