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Earthquake-Volcano
Term | Definition |
---|---|
earthquake | shaking that results from the movement of rock beneath Earth's surface |
faults | a break or crack in Earth's lithosphere along which the rocks move |
syncline | downward fold in the rock formed by compression in Earth's surface |
tsunami | giant wave caused by an earthquake on the ocean floor |
extinct | a volcano that is unlikely to erupt again |
stress | a force that acts on rock to change its shape |
strike-slip fault | type of fault where rock on either side move past each other sideways with little or no up and down movement |
seismic wave | vibration that travels through Earth carrying the energy released through an earthquake |
shearing | stress that pushes a mass of rock in opposite directions |
Ring of Fire | a major belt of volcanoes that rims the Pacific Ocean |
seismograph | a device that records movements caused by seismic waves as they move through Earth |
hot spot | area where magma from deep within the mantle melts through the crust above it |
compression | stress that squeezes rock until it folds or breaks |
aftershock | earthquake that occurs after a larger earthquake in the same area |
active | volcano that is erupting or has shown signs of erupting in the near future |
tension | stress that stretches rock so that it becomes thinner in the middle |
anticline | an upward fold in rock formed by compression of Earth's crust |
dormant | a volcano that does not show signs of erupting in the near future |
normal fault | type of fault where the hanging wall slides downward; caused by tension in the crust. |
reverse fault | type of fault where the hanging wall slides upward; caused by compression in the crust |