Earth's Systems

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