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Flashcards in earthquakes Deck (23):
1

crust

earth's outer most layer

2

earthquake

movement of the ground caused by the waves of energy releases as move along the faults.

3

elastic limit

the limit of how far it will stretch or bend.

4

epicenter

point on earth's surface directly above the focus.

5

Fault

Surface along which rocks break and move.

6

focus

Point in earth's interior where the energy releases and occurrs

7

Inner core

center of the earth -iron and nickle

8

Magnitude

measure of the energy reaches in an earthquake.

9

Mantle

largest layer, above outer core. -silicon, magnesium, oxygen and iron.

10

Moho discontinuity

boundary between earth's crust an the mantle -seismic waves travel faster below the Moho.

11

Normal fault

rock above the fault surface moves downward in relation to the rock below the earths surface.

12

Outer core

liquid layer -silicon, magnesium, oxygen and iron.

13

Primary wave

earthquake waves that move back and forth same direction are called seismic waves, too.

14

Reverse fault

rocks above the fault are forced up[ and over the rocks below the fault.

15

Secondary wave

In an earthquake waves that causes particles in the rock to move at right angles to the direction of the wave.

16

Seismic wave

in an earthquake the energy waves that moves outward from the earth.

17

Seismograph

used to record, primary, seismic, secondary, & surface waves from earthquakes.

18

Shadow zone

area on the other side of the earth where waves are not detected.

19

Strike-slip fault

rock on either side of the surface move past each other w/ or down.

20

Surface wave

earthquake waves that travel outward from the epicenter. these wave a particular fashion back and forth movement.

21

Tsunami

Ocean waves generated by earthquakes

22

Compression

force of squeezing or pressing together.

23

tension

is stress that causes stretching.