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