Plate tectonics key terms

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Hot spot
A point on the surface of the earth located above a plume of rising magma. EG: Hawaii
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Plate
The lithosphere is divided into a number of segments known as plates. These rigid slabs float on the underlying semi-molten mantle and are moved by convection currents
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Plate tectonics
a theory that attempts to explain the formation and distribution of the earths major structural features in terms of a series of plates that makeup its surface
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Seismic waves
shock waves released by the rupture of rock strata at the focus of an earthquake. they travel through the rocks and are measured and recorded on a seismograph
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Tsunami
Sea waves, which can be very large, generated by shallow-focus underwater earthquakes, volcanic eruptions, underwater debris slides and large landslides into the sea
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volcano
an opening or vent through which magma, moten rock, ash or volatiles erupt on the surface of the earth
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tephra
solid material of varying grain size, from volcanic bombs to ash particles, ejected into the atmosphere
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pyroclastic flow
very hot (800 degrees celsius), gas charged, high-velocity flows made up of a mix of gases and tephra
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volcanic gases
including cardon dioxide, carbon monoxide, hydrogen sulphide, sulpher dioxide and chlorine.
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Iahars
volcanic mud slows
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flooding
melting of glaciers and ice caps
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climate change
ejection of vast amounts of volcanic debris into the atmosphere can reduce global temperatures and is believed to have an agent in past climate change
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Card 2

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The lithosphere is divided into a number of segments known as plates. These rigid slabs float on the underlying semi-molten mantle and are moved by convection currents

Back

Plate

Card 3

Front

a theory that attempts to explain the formation and distribution of the earths major structural features in terms of a series of plates that makeup its surface

Back

Preview of the back of card 3

Card 4

Front

shock waves released by the rupture of rock strata at the focus of an earthquake. they travel through the rocks and are measured and recorded on a seismograph

Back

Preview of the back of card 4

Card 5

Front

Sea waves, which can be very large, generated by shallow-focus underwater earthquakes, volcanic eruptions, underwater debris slides and large landslides into the sea

Back

Preview of the back of card 5
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