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