Across
- 7. sudden events that led to a mass extinction
- 8. located between the mantle and the outer core
- 10. includes he crust and upper park of the mantle,and divided into tectonic plates
Down
- 1. hot material rises, cooler materials sink. it drives plate tectonics
- 2. the semi-fluid layer of the mantle where convection currents happen
- 3. a group of the same species living in the same area
- 4. rock formed when lava or magma cools and hardens
- 5. instruments used to measure and record seismic waves
- 6. formed as a result of high temperature and pressure deep within the earth changing a rock that already existed
- 9. extinction events extinction events that occur over a longer time period