Restless Earth

7. The semi-fluid layer of the mantle where convection currents happen.
8. Instruments used to measure and record seismic waves
10. Deep elongated depressions in the ocean, often associated with subduction zones.
13. Tectonic plates move away from each other, usually forms new crust and rift valleys.
15. Sudden events that led to a mass extinction
17. A group of the same species living in the same area

1. New oceanic crust is formed as tectonic plates pull apart and magma rises.
2. Tectonic plates move toward each other. usually forms new crust and rift valleys.
3. Hot material rises, cooler materials sink. Drives plate tectonics.
4. Extinction events that occur over a longer time period.
5. Where tectonic plates slide past each other. Causes Earthquakes.
6. Located between the mantle and the outer core
8. Forms after weathering and erosion when sediments compact and cement.
9. Includes the crust and upper part of the mantle, and is divided into tectonic plates.
10. Large, rigid pieces of the Earths lithosphere that move and interact with each other along plate boundaries.
11. Formed at the plate boundaries usually when plates collide.
12. Fractures or zones of weakness in the Earth's crust
14. Formed as a result of high temperature and pressure deep within Earth changing a rock that already existed.
16. Name of the ancient supercontinent when it was all one landmass.
18. Rock formed when lava or magma cools and hardens