Plate tectonics
Across
- 2. waves. Vibrations caused by release of energy during an earthquake
- 6. plates parts of the crust and uppermost mangle that move on the earth's surface
- 8. plate boundary where two tectonic plates collide
- 10. push new material pushes older material aside, causing tectonic plates to move apart
- 11. deep valleys in the ocean
- 14. Location in earth where an earthquake starts
- 16. of plate tectonics the theory of the lithosphere being broken up into different pieces
- 17. pull. Pulling of a tectonic plate due to gravity and subduction
- 18. plate boundary where two tectonic plates slide past each other
- 19. For earthquakes, a number that represents strength
- 20. convection. Current in the Mantle where cooler, denser material sinks and warmer less dense material rises
Down
- 1. Point on earths surface above where an earthquake starts
- 3. Instrument that measure and record ground vibration
- 4. plate boundary where two tectonic plates move apart
- 5. Large break in rock
- 7. a destructive event that results from geological processes
- 9. ridges mountains along ocean
- 12. ground shaking energy when a break in the crust occurs
- 13. Opening in earth's surface where magma and other materials are released
- 15. floor spreading. Magma rising to create new oceanic plates