Across
- 4. Instruments used to measure and record seismic waves
- 6. formed at plate boundaries usually when plates collide
- 7. Included the crust and the upper part of the mantel, and is divided into tectonic plates
- 9. Located between the mantle and the outer core
- 10. form after weathering and erosion when sediments compact and cement
- 15. A group of the same species living in the same area
- 17. events that lead to mass extinction
- 18. cycles Hot material rises, cooler materials sink. IT drives plate tectonics
- 19. The semi-fluid layer of the mantle where convection currents happen
- 20. Tectonic plates move toward each other usually forms mountains and volcanoes
- 21. Fracture zones of weakness in the Earths crust
Down
- 1. Tectonic plates slide past each other. Causes earthquakes
- 2. Tectonic plates move away from each other, usually forms new crust and rift valleys
- 3. Rock formed when lava or magma cools and hardens; crystals
- 5. new oceanic crust is formed as tectonic plates pull apart and magma rises
- 8. Extinction events that occur over a longer time period
- 11. Formed as a result of high temperature and pressure deep within earth changing a rock that already existed
- 12. Plates Large,rigid pieces of the Earths lithosphere that move and interact with each other along plate boundaries
- 13. Deep, elongated depressions in the ocean, often associated with subduction zones
- 14. An opening in the Earths crust through which molten rock is pushed out and creates new rocks
- 16. Name of the ancient super continent when it was all one landmass