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