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Earth Science > Chapter 6 - Earthquakes > Flashcards

Chapter 6 - Earthquakes Flashcards

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0
Q

Accelerometer

A

Measures changes in speed

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1
Q

Seismometer

A

An instrument that measures earth waves

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2
Q

A series of low-frequency shock waves, somewhat like sound waves, traveling through the earth

A

Earthquake

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3
Q

T/F. Most earthquakes are too slight for a person to feel.

A

True

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4
Q

What is an example of tension stress?

A

The pulling on a rope

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5
Q

What is the most important stress in producing earthquakes?

A

Shear stress

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6
Q

Which plate sections are moving apart?

A

Divergent boundaries

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7
Q

Which zones of collision are moving toward each other?

A

Convergent boundaries

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8
Q

Places where plates slide past each other in opposite directions along long cracks in the crust

A

Transform boundaries

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9
Q

T/F. Al, materials respond to shear stress the same way.

A

False

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10
Q

What’s the difference between a joint and a fault?

A

Movement

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11
Q

Cracks formed when rocks under stress begin to fail

A

Joints

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12
Q

A crack in a rock where movement has occurred

A

Fault

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13
Q

What kind of fault is the San Andreas?

A

Strike-slip fault

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14
Q

T/F. Not all transform boundaries are strike-slip faults.

A

False

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15
Q

Strike-slip faults are also called…

A

Transform faults

16
Q

T/f. Certain kinds of minerals and even water lubricate faults

A

True

17
Q

Secondary earthquakes

A

Aftershocks

18
Q

Include both a seismometer and a way to record or graph the changing earth waves

A

Seismograph

19
Q

Fastest body waves; travel through both solid and liquid rock

A

P waves

20
Q

Can’t travel through liquids

A

S waves

21
Q

Kinds of waves

A

S, p, Rayleigh, love, and surface

22
Q

The center of an earthquake’s activity

A

Focus

23
Q

How many stations does it take to pinpoint an earthquake’s epicenter to one location?

A

Three

24
Q

Indicates the energy released by the earth movement

A

Richter scale

25
Q

What units is the Richter scale given in?

A

Units of magnitude

26
Q

How much more energy does a 3 earthquake have than a 2?

A

31.6 times

27
Q

Could the whole world feel it if there was an earthquake of a 10 on the Richter scale?

A

Yes

28
Q

T/F. The Richter scale goes only up to 10

A

False. The Richter scale has no limit

29
Q

A measure of how much damage actually results from the earthquake

A

An earthquake’s intensity

30
Q

T/F. Architects know how to design buildings that can resist collapsing in earthquakes up to magnitude 6.0

A

False

31
Q

Large tidal waves that earthquakes trigger

A

Tsunamis

32
Q

T/F. An early warning system is not the same thing as predicting when an earthquake will happen

A

True

Earth Science (13 decks)

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