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