Restless Earth

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