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Geology
| Question | Answer |
|---|---|
| Pangaea | "All Earth" super continent. Existed 250 million years ago. |
| Plate Tectonics | Theory that the Earth's crust is broken into parts. |
| Plate | Rigid block of Earth's crust. |
| Continental Drift | Continents plowing through the seafloor to their present day position. |
| Earthquake | A shaking or trembling of the Earth. |
| Convergent boundary | Two tectonic plates that push directly into one another. (form mountains) |
| Divergent boundary | The boundary between two tectonic plates that move away from each other. (form valleys) |
| Transform fault boundary | The boundary between two tectonic plates that slide past each other. (earthquakes) |
| Magnetometer | Instrument that detects magnetic changes in crustal rocks. |
| Fault | A break in the Earth's crust, in which blocks of the crust slide next to one another due to tectonic forces. |
| Mid Ocean Ridge | A long mountain chain that forms on the ocean floor where tectonic plates pull apart. The youngest rocks on earth are found here. |
| Seismograph | Instrument used to record the force and timing of an earthquake |
| Seismogram | Paper print out from the seismograph showing arrival times of earthquake waves. |
| Volcano | A mountain that forms when molten rock rises to the earth's surface |
| Magma | Hot liquid that forms when rocks melt under the earth's surface. |
| Lava | Magma that flows on the earth's surface. |
| Epicenter | Location on Earth's surface directly above the earthquake. |
| Focus | Location within the Earth where the earthquake occurred. |