volcanoes, plate tectonics, and earthquakes
Across
- 5. the shaking that results from the movement of rock beneath earth's surface
- 7. point under the surface of the Earth where an earthquake originate
- 8. wave which causes rock particles to move in a backward rolling and side to side swaying motion
- 10. measure of the energy released by an earthquake
- 11. harry hess's theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge
- 13. a wave produced by an earthquake
- 14. ocean wave produced by an earthquake on the ocean floor
- 15. breaking in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface
- 16. the largest intrusive igneous rock bodies are ____________
- 19. the worlds most active volcano, located in Hawaii
- 21. a theory stating that the earth's surface is broken into plates that move
- 24. break in rock caused by shear forces
- 26. when magma reaches earth's surface and flows out through an opening called a _________
- 27. breaking in earth's crust along which movement occurs
- 28. large, ancient landmass that was composed of all the continents joined together
- 29. when rocks break they move along surfaces called _____________
- 30. an opening in Earth that erupts gases, ash, and lava.
- 31. the point on the Earth's surface directly above the focus of an earthquake
Down
- 1. seismic wave that moves rock particles back and forth in the same direction that the wave travels
- 2. sections of the Earth's upper mantle and crust that move slowly
- 3. bits of rock or solidified lava dropped from the air are called___________
- 4. current a current in the asthenosphere caused by the rising of heated fluid and sinking of cooled fluid.
- 6. the process by which an earthquake's violent movement suddenly turns loose soil into liquid mud
- 9. Alfred wegener's theory that continents can drift apart from one another
- 11. an instrument that records earthquake waves
- 12. break in rock caused by compressive forces
- 17. Hot rock at these areas is forced toward the crust where it melts partically to form a __________
- 18. the solid, outer layer of the earth that consists of the crust and the upper part of the mantle
- 20. a broad volcano with gently slipping sides
- 22. the steep-walled depression around the vent is the _________
- 23. seismic wave that moves rock particles at right angles to the direction of the wave
- 24. when oceanic and continental plates collide
- 25. plastic-like layer of the lower mantle on which the lithosphere move