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