Across
- 3. located between the mantle and the outer core.
- 6. rock formed when lava or magma cools and hardens.
- 7. name of the acienct supercontinent when it was all one landmass.
- 10. includes crust n upper part of the mantle, and is divided into tectonic plates.
- 12. forms after weathering and erosion when sendments compact and cement.
- 14. instruments used to measure and record seismic waves.
- 16. sudden events that led to a mass extinction.
- 19. tectonic plates move toward another,usually forms mountains n volcanoes.
- 20. hot material rises, cooler materials sink, it drives plate tectonics.
- 21. new oceanic crust is formed as tectonic plates pull apart and magma rises.
Down
- 1. tectonic plates move away from one another, usually forms new crust n rift valleys.
- 2. formed as a result of high temp and pressure deep within Earth changing a rock that already existed.
- 4. extinction events that occur over longer time period.
- 5. the semi-fluid layer of the mantle where convection currents happen.
- 8. formed plate boundaries usually when plates collide.
- 9. where tectonic plates slide past each other
- 11. fractures or zones of weakness in the earths crust.
- 13. large, rigid peices of the Earth's lithosphere that move and interact with each other along plate boundries.
- 15. a group of the same species living in the same area.
- 17. deep, elongated depressions in the ocean, often associated with subduction zones.
- 18. an opening in the earths crust through which molten rock is pushed out and creates new rock.