earth

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Across
  1. 2. forms after weathering and erosion when sediments compact and cements.
  2. 4. instruments used to measure and record seismic waves.
  3. 6. includes the crust and upper part of the mantle, and is divided into tectonic plates.
  4. 7. hot material rises, cooler materials sink.it drives plate tectonics
  5. 8. rock formed when lava or magma cools or hardens.
  6. 9. sudden events that led to a mass extinction.
Down
  1. 1. extinction events that occur over a longer time period.
  2. 3. formed as a result of high temperature and pressure deep within earth changing a rock that already existed
  3. 5. a group of the same species living in the same place.