Across
- 2. beginning point of an earthquake
- 9. records of the movements of the earth
- 10. waves fastest moving; travel in a straight path by a push and pull motion; these waves move back and forth
- 12. the point on the surface of the earth directly above the focus
- 13. fault rocks push together until a section of rock moves upward
- 14. Boundary Two plates move apart, or diverge; usually occur at the mid-ocean ridge
- 18. softer part of mantle below the lithosphere which is hotter and under increased pressure
- 21. giant ocean waves triggered by earthquakes, volcanoes, or landslides
- 22. fault rocks moving apart
- 23. Boundary place where two plates slip past each other, moving in opposite directions (frequent Earthquakes)
- 24. waves vibrations that flow out from the beginning point of an earthquake
- 26. of Plate Tectonics explains the formation, movement and subduction of Earth’s plates.
Down
- 1. Boundaries The edges of the plates meet at lines called
- 3. scientists who study the movement of the earth
- 4. waves seismic waves that occur beneath the surface of the earth
- 5. uppermost part of mantle and the crust for a ridge layer about 100 kilometers thick
- 6. fault rocks moving horizontally past each other
- 7. Boundary Place where two plates come together, or converge, causing a collision
- 8. a large landmass that some scientists think may have existed at one time
- 11. Wegener hypothesized that at one time all the continents were once joined together in a single landmass
- 15. scale measures the magnitude of an earthquake’s seismic waves and assigns it a number
- 16. strength of the seismic waves of an earthquake, this is how much energy is released.
- 17. a machine that detects, times, and measures the movement of the earth
- 19. waves move more slowly; move in an up and down zigzag pattern
- 20. Waves the slowest moving and most destructive waves
- 25. Layer of solid rock that forms earth’s outer “skin”