| Term | Definition |
|---|
| Convergent Boundary | subduction zone |
| Divergent Boundary | mid-ocean ridge & rift valley |
| Strike-Slip Boundary | lateral fault |
| Magnetic Anomaly | evidence that the ocean floor is spreading apart. It shows that the earth's magnetic field has reversed several times throughout the earth's history |
| Pangea | the super continent where all the continents were once joined |
| Harry Hess | Proposed the theory of sea floor spreading. |
| Mountains and Volcano's and ocean basins | When two plates colide |
| Ridges | Are youngest rocks that are located on the ocen floor at mid-ocean. |
| Rift valleys and plate bounderies | Are results of where plate movement can be seen. |
| Earthquakes | where plates slide past one another, these occur |
| Secondary Waves | (s-waves) Cause particles in rock to move at right angles to the direction of wave travel |
| Surface Waves | move rock particles in a backward, rolling motion and a sideways swaying motion (slowest waves) |
| Primary Waves | (P-waves) cause particles in rocks to move back and forth in the same direction that the wave is traveling |
| Seismograph | a paper record that measures seismic waves that consists of a rotating drum of paper and a pendulum with an attached pen |
| Crust | the Earth's outer layer and is about 5 to 60 km thick |
| Seismic Waves | waves generated by an earthquake, can move the ground forward and backward, up and down, and side to side |
| Focus | an earthquake's point of energy release |
| Reverse Fault | compression forces squeeze rock above the fault up and over the rock below the fault |
| Normal Fault | (tension forces) caused by rock above the fault moving downward in relation to the rock below the fault |
| Elastic deformation | When elastic limits are passed, rocks break |
Combine with other sets
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