Earthquakes
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| Tectonic plate | Massive slab of solid rock made up of Earth's lithosphere |
| Convection currents | Heat-driven cycles that occur in the air, ocean, and mantle caused by a difference in temperature |
| P wave | Primary waves, are the first waves to arrive at a seismograph. |
| Secondary waves | Are the second waves to arrive during an earthquake |
| Seismograph | Instruments used to record the motion of the ground during an earthquake. |
| Seismogram | The recording of the ground shaking at the specific location of the instrument |