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