Across
- 4. plates slide pass each other it causes earthquakes
- 8. formed as a result of high temperature and pressed deep within earth changing a rock that already existed.
- 11. rock formed when lava or magma cools or hardens
- 13. sudden events that led to a mass extinction
- 15. large, rigid pieces of the earths lithosphere that move and interact with each other along plate boundaries
- 16. instruments used to measure and record seismic waves
- 17. located between the mantle and outer core
- 18. extinction events that occur over a long period of time
Down
- 1. the semi-fluid layer of the mantle where convection currents happen
- 2. name of the ancient supercontinent when it was all one landmass
- 3. forms after weathering and erosion when sediments compact and cement
- 4. deep, elingated depressins in the ocean, other associated with the subduction zone
- 5. fractured or zones of weakness in the earths crust
- 6. an opening in the earths crust through which molten rock is pushed out and creates new rock
- 7. a group of the same species living in the same area
- 9. cycles hot material rises, cool materials sink. drives plate tectonics.
- 10. formed at plate boundries usally when plates collide
- 12. includes the crust and upper part of the mantle and is divided into tectonic plates
- 14. new oceanic crust is formed as tectonic plates pull apart and magma rises