Earth's Systems

2. Tectonic plates move away from each other, usually forms new crust and rift valleys.
3. Includes the crust and upper part of the mantle, and it is divided into tectonic plates
4. the semi-fluid layer of the mantle where convection currents happen
6. Hot material rises, cooler material sinks. It drives plate tectonics
8. An opening in the Earth's crust through which molten rock is pushed out and creates new rock.
11. New oceanic crust is formed as tectonic plates pull apart and magma rises
16. Located between the mantle and the outer core
17. Extinction events that occur over a longer time period
19. When tectonic plates SLIDE past each other. Causes earthquakes
21. Formed as a result of high temperature and pressure deep within earth changing a rock that already existed

1. Tectonic plates move toward each other, usually forms mountains and volcanoes.
5. Instruments used to measure and record seismic waves.
7. A group of the same species living in the same area
9. Formed at plate boundaries usually when plates collide.
10. Deep, elongated depressions in the ocean, often associated with subduction zones
12. Name of the ancient supercontinent when it was all one landmass
13. Forms after weathering and erosion when sediments compact and cement.
14. Large, rigid pieces of Earth's lithosphere that move and interact with each other along plate boundaries.
15. Fractures or zones of weakness in the Earth's crust
18. Rock formed when lava or magma cools and hardens
20. Sudden events that led to mass extinction