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Science > Earthquake and Volcano test > Flashcards

Earthquake and Volcano test Flashcards

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1
Q

A break in a body of rock

A

Fault

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2
Q

Point inside the Earth where an earthquake begins

A

Focus

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3
Q

Point on the Earth’s surface directly above an earthquake’s focus

A

Epicenter

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4
Q

Sudden return of elastically deformed rock to its original shape

A

Elastic Rebound

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5
Q

How big an earthquake is

A

Magnitude

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6
Q

How severe the shaking is

A

Intensity

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7
Q

Body waves

A

Seismic waves that move through the earth

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8
Q

Surface waves

A

Seismic waves that travel on the surface of the earth

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9
Q

Earthquakes can only occur along faults

A

True

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10
Q

Earthquakes can only occur along the tectonic plate boundaries

A

False, because of the tectonic plates constantly moving and sliding

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11
Q

seismic wave that causes particles of rock to move in a back and forth direction

A

Primary wave

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12
Q

Seismic wave that causes particles to move in a side by side motion

A

Secondary wave

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13
Q

2 types of surface waves

A

love, Rayleigh

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14
Q

2 types of body waves

A

primary, secondary

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15
Q

3 types of volcanos

A

shield, cinder cone, composite

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16
Q

what are the 4 types of pyroclastic material?

A

volcanic bombs (large blob of volcano)
ash ( glasslike silvers)
blocks (largest piece)
lapilli (largest stone)

17
Q

what are the 4 types of lava?

A

AA (pours quickly)
pahouhoe (flows slowly)
pillow (rounded lumps)
blocky (oozes)

18
Q

define viscosity

A

how lava flows

19
Q

what are the 3 types of volcanic landforms?

A

craters, calderas, lava plateaus

20
Q

what is the difference between magma and lava ?

A

magma- molten rock

lava- magma that flows onto the earth’s surface

21
Q

what is the difference between explosive and nonexplosive eruptions

A

non: common, calm lava flow
explosive: rare, cause molten rock to be blown into tiny particles that harden in the air

22
Q

Parts of a volcano

A

Magma chamber

Vent

23
Q

Richter scale

A

Magnitude

24
Q

Mecalli scale

A

Intensity

25
Q

2 types of waves

A

Body and surface waves

Science (10 decks)

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