Across
- 3. hot materials rise, cooler materials sink it drives plate tectonics
- 5. extinction events that occur over a longer time period
- 8. The semi-fluid layer of the mantle where convection currents happen
- 10. formed as a result of high temperature and pressure deep within earth changing a rock that already exists
- 11. sudden event that led to mass extinction
Down
- 1. includes the crust and upper part of the mantle, and is divided into tectonic plates
- 2. a group of the same species living in the same area
- 4. name of the ancient supercontinent when it was all one landmass
- 6. rock formed when lava or magma cools and hardens
- 7. instruments used to measure and record seismic waves
- 9. forms after weathering and erosion when sediments compact and cement