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