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BJU Space/Earth 6

BJU - Space and Earth Science - Chapter 6 (4th edition)

QuestionAnswer
A series of inaudible shock waves traveling through the earth. earthquake
The point on the surface of the earth directly above the focus of an earthquake. epicenter
It is the point generally some distance below the earth's surface at which earthquake waves are generated. focus
The amount of energy that is produced by a phenomenon; in seismology, the measure of the destructiveness of an earthquake as indicated by the Modified Mercalli Intensity (MMI) scale. intensity
The measure of the brightness of a star; a measure of the amount of energy released by an earthquake. magnitude
The first waves that reach a seismic station after an earthquake. Such earthquake waves are capable of passing through the earth's core. P wave
An open-ended scale of earthquake magnitude. A magnitude of 3 can be barely felt. A magnitude of 9 or more is completely devastating. Richter scale
The second type of earthquake wave to reach a seismic station after the P waves from the earthquake. This type of wave cannot pass through the core of the earth. S wave
An instrument that detects earthquake waves seismometer
A long-wavelength sea wave produced by volcanic or seismic action near or under the ocean; can cause great and sudden devastation when it comes ashore in a populated area. tsunami
One of several kinds of earthquake waves that travel along the surface of the earth surface wave
Any force exerted on the matter in an object stress
Forces or stresses that act to squeeze or crush an object or substance compression
Forces or stresses that act to pull an object or substance apart tension
Forces or stresses acting in opposite directions on different parts of the same object or substance shear
The margin between two tectonic plates that are moving away from each other or diverging divergent boundary
The margin between two tectonic plates that are moving toward each other or converging convergent boundary
The margin between two tectonic plates that are sliding in opposite directions parallel to the margins transform boundary
Any change in the shape of a solid due to stresses exerted on the material strain
A stress crack in a rock that shows no indications of motion of the rock on either side of the crack joint
A crack or joint in rock where the rock on both sides of the joint have moved relative to each other fault
The compass direction of an imaginary line drawn horizontally on the surface of a fault face or rock stratum. Helps indicate the orientation of the fault or stratum at a given location strike
The angle of slope of a fault face or stratum, measured from the horizontal plane to the fault or stratum surface dip
A fault whose main motion is parallel to its dip direction dip-slip fault
A dip-slip fault in which the body of rock above the fault surface drops relative to the body of rock underneath the fault surface normal fault
A dip-slip fault in which the upper body of rock slides upward relative to the lower body of rock reverse fault
A fault along which the main movement is horizontal or parallel to the faults strike; also called a transform fault strike-slip fault
Created by: marchscience
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