Terms : Hide Images
| 206321532 | diastrophism | the process of deformation that produces continents and ocean basins in the earth's crust | |
| 206321533 | orogenesis | the processes that collectively result in the formation of mountains. | |
| 206321534 | earthquake | shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity | |
| 206321535 | focus | the point along a fault at which the first motion of an earthquake occurs | |
| 206321536 | epicenter | the point on the Earth's surface directly above the focus of an earthquake | |
| 206321537 | Richter scale | a logarithmic scale of 1 to 10 used to express the energy released by an earthquake | |
| 206321538 | body wave | seismic waves that travel through Earth's interior | |
| 206321539 | surface wave | wave which causes rock particles to move in a backward rolling and side to side swaying motion, this is the most destructive earthquake wave | |
| 206321540 | P wave | a type of seismic wave that compresses and expands the ground. | |
| 206321541 | S wave | a type of seismic wave that moves the ground up and down or side to side | |
| 206321542 | primary effect | (geology) permanent features produced by earthquake, such as fault scarps, surface ruptures, and offsets of natural or human-constructed objects | |
| 206321543 | secondary effect | (geology) earthquake effects that result when ground movement causes other types of damage, such as landslides, flooding caused by subsidence of land, tsunamis, liquefaction and fire | |
| 206321544 | hot spot | an area where magma from deep within the mantle melts through the crust above it | |
| 206321545 | active volcano | a volcano that is erupting or has shown signs that it may erupt in the near future | |
| 206321546 | intermittent volcano | a volcano that erupt at fairly regular periods | |
| 206321547 | dormant volcano | a volcano that has not erupted for a long time, but may erupt again one day | |
| 206321548 | extinct volcano | a volcano that has not erupted for thousands of years and probably will not erupt again | |
| 206321549 | conduit | pipe through which magma exits a volcano | |
| 206321550 | vent | a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt | |
| 206321551 | ejecta | any substance emitted by an active volcano | |
| 206321552 | pyroclastic flow | a hot, high-velocity mixture of ash, gas and fragmented rock that flows like a liquid down slopes and over terrain | |
| 206321553 | shield volcano | a type of volcano that has a wide base and gently sloping sides; eruptions are quieter and tend to have gentle lava flows. | |
| 206321554 | strato volcano (composite volcano) | conical, steep-side, symmetrical volcano (ratio of height to breadth relatively large) composed of alternating layers of silicic lavas and pyroclastics. Typical of subduction zone volcanism. | |
| 206321555 | dome volcano | thick lava flows; dome shaped mountain | |
| 206321556 | cinder volcano | a steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening | |
| 206321557 | spatter cone | A low, steep-sided cone of spatter built up on a fissure or vent | |
| 206321558 | caldera | a large crater caused by the violent explosion of a volcano that collapses into a depression | |
| 206321559 | tide | the periodic rise and fall of the sea level under the gravitational pull of the moon |
