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Volcanoes and Earthquakes
words for volcanoes and earthquakes
13
Science
6th Grade
02/15/2006

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Cards

Term
sonar
Definition
echo-sounding measurements
Term
Hot-spot
Definition
located in the interior of a plate, are weak spots that allow magma to flow or create a volcano
Term
Lava
Definition
magma that has reached the earth's surface.
Term
Silica
Definition
material formed from the elements oxygen and silicon, is one of the most abundant materials in the Earth’s crust and mantle.
Term
Active (living) volcano
Definition
is one that is erupting or has shown signs that it may erupt in the near future.
Term
Dormant (sleeping) volcano
Definition
is like a sleeping bear. Scientist expect it to awaken in the future.
Term
Extinct (dead) volcano
Definition
is unlikely to erupt again.
Term
Focus
Definition
the point beneath the surface where the rock is under stress.
Term
Epicenter
Definition
the point on the surface directly above the focus.
Term
Epicenter
Definition
the point on the surface directly above the focus.

10. Seismograph: records the ground movement (vibrations) caused by seismic waves as they move through the Earth.

11. Moment Magnitude Scale: it rates the total energy released by an earthquake.

12. Viscosity: the resistance of a liquid to flowing. High viscosity = flows fast. Low viscosity = flows slowly.
Term
Seismograph
Definition
records the ground movement (vibrations) caused by seismic waves as they move through the Earth.
Term
Moment Magnitude Scale
Definition
it rates the total energy released by an earthquake.

slowly.
Term
Viscosity
Definition
the resistance of a liquid to flowing. High viscosity = flows fast. Low viscosity = flows
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