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