restless earth vocab

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Across
  1. 4. a group of the same species living in the same area
  2. 5. includes the crust and upper part of the mantle, and is divided into tectonic plates
  3. 7. extinction events that occur over a longer time period
  4. 8. Spreading new oceanic crust is formed as tectonic plates pull apart and magma rises
  5. 10. formed as a result of high tempature and a pressure deep within earth changing a rock that already existed
  6. 12. located between the mantle and the outer core
  7. 14. rock formed when lava or magma cools and hardens
  8. 16. forms after weathering and erosion when sediments compact and cement
  9. 17. tectonic plates move toward each other, usually forms new mountains and volcanoes
  10. 18. Large, rigid pieces of the earth´s lithosphere that move and interact with each other along plate boundaries
Down
  1. 1. formed at plate boundaries usually when plates collide
  2. 2. the semi-fluid layer of the mantle where convection currents happen
  3. 3. tectonic move away from each other, usually forms new crust and rift valleys
  4. 6. instruments used to measure and record seismic waves
  5. 9. sudden events that led to a mass extinction
  6. 11. hot materials rises, cooler materials sink. it drives plate tectonics
  7. 13. where tectonic slide past each other. Causes earthquakes
  8. 15. Name of the ancient supercontinent when it was all one landmass