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Earth Science > Chapter 7 science > Flashcards

Chapter 7 science Flashcards

1
Q

what causes EQ’s?

A

earthquakes are a consequence of moving plates

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2
Q

earthquake

A

vibration from the sudden release of energy from an area along a fault

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3
Q

fault

A

fracture in the crust along which there has been movement. two blocks of rock move past each other

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4
Q

normal fault

A

divergent plate

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5
Q

reverse fault

A

convergent plate

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6
Q

strike -slip fault

A

transformate plate

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7
Q

what causes the sudden release of energy

A

plate movement, blocks are locked, elastic energy over comes friction,

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8
Q

seismic waves

A

vibration of EQ’s

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9
Q

two types of seismic waves

A

body waves, surface ways

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10
Q

body waves

A

goes through the earth

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11
Q

body waves types

A

P waves, s waves

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12
Q

p-waves (primary)

A

first waves, compression, high velocity

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13
Q

s-waves (secondary)

A

sher, slower, only travels through solids

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14
Q

surface waves

A

most distructive; on the surface

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15
Q

two types of surface waves

A

love, rayleigh

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16
Q

love waves

A

move side to side

17
Q

rayleigh waves

A

forward rolling motion

18
Q

measuring seismic waves

A

waves recieved by a seismograph and the waves are recorded on a seismograph

19
Q

How are earthquakes epicenters located?

A

using differences in arrival times between p and s waves

20
Q

semisgraphs

A

locates distances not direction

21
Q

intersection of earthquakes

A

epicenter

22
Q

earthquake strength is measured by

A

intensity and magnitude

23
Q

intensity scale is based on

A

damage

24
Q

Richter scale

A

logarithmic based 10 scale

25
Q

amount of damage caused by an EQ is a function of

A

duration and magnitude

26
Q

houses should be.. when in an earthquake area

A

able to move and to be flexible

27
Q

Seismic gaps

A

potential sites for future earthquakes

Earth Science (20 decks)

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