Across
- 2. Rock formed when lava or magma cools or hardens
- 3. Instruments used to measure and record seismic waves
- 6. Forms after weathering and erosion when sediments compact and cement
- 8. formed at plate boundaries when plates collide
- 10. Large, rigid pieces of earths lithosphere that move and interact with eachother
- 11. Located between the mantle and the outer core.
- 12. Deep, elongated depressions in the ocean, often associated with subduction zones
- 16. sudden event that leads to mass extinction
- 19. an opening in the Earth's surface where molten rock is pushed out and makes new rock
- 21. Extinction events that occur over a longer time period
Down
- 1. Includes the crust and upper mantle
- 4. new oceanic crust is formed as tectonic plates pull apart and magma rises
- 5. Tectonic plates move away from eachother, usually forms new crust and rift vallys
- 7. Formed as a result of high temperature and pressure deep within earth changing a rock
- 9. The semi fluid layer of the mantle where convection currents happen
- 13. Tectonic plates move toward each other, usually forms mountains and volcanoes.
- 14. where tectonic plates slide past each other, causes earthquakes
- 15. A group of the same species living in an area
- 17. Hot material rises cooler materials sink
- 18. Fractures or zones of weakness in the Earth's crust
- 20. Name of the ancient super continent when it was one landmass