Choice Board

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

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.