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