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