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Earthquakes
Key words for the earthquakes topic
13
Geography
10th Grade
02/07/2010

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Term
Earthquake
Definition
The shaking of the earth's crust caused by sudden rock movement.
Term
Aftershocks
Definition
Smaller ground shakes that follow the main one.
Term
Crust
Definition
The outer layer of the earth.
Term
Epicentre
Definition
The point on the ground directly above the focus of an earthquake.
Term
Hypocentre
Definition
The American term for epicente.
Term
Fault
Definition
A crack in the earth's crust where rock has moved.
Term
Focus
Definition
The 'centre' of an earthquake - the place where the rock moved.
Term
Magnitude
Definition
How much energy and earthquake gives out.
Term
Plates
Definition
The large slabs that the earth's surface is broekn into.
Term
Richter Scale
Definition
A scale for measuring the energy given out in an earthquake.
Term
Seismic wave
Definition
A wave of energy given out in an earthquake.
Term
Seismometer
Definition
An instrument for recording the vibrations on an earthquake.
Term
Seismograph
Definition
A graph showing the shaking of the earth during an earthquake.
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