Earthquake lesson 1 Flashcards

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1
Q

the vibration of earth caused by the rapid release of energy

A

Earthquake

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2
Q

A broken segment of a litosphere

A

Plate

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3
Q

Two plates collides with each other

A

Convergent

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4
Q

two plates moving away

A

Divergent

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5
Q

Two plates slide past with each other

A

Transform

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6
Q

The origin of the earthquake

A

Focus

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7
Q

Force acting on some area

A

Stress

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8
Q

Type of stress that pulls the rock apart

A

Tensional stress

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9
Q

Type of stress that squeezes the rock

A

Compressional stress

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10
Q

Type of stress that moves horizontally

A

Shear stress

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11
Q

A break or fracture on a rock

A

Fault

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12
Q

A fault that has a possibility to move again in the future

A

Active fault

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13
Q

No fault movement after past million years

A

Inactiver fault

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14
Q

0-70km focus earthquake

A

Shallow focus earthquake

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15
Q

70 - 700km earthquake

A

Deep focus earthquake

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16
Q

A block of crust below the fault

A

Footwall

17
Q

A block of crust above the fault

A

Hanging wall

18
Q

Normal fault causes what?

A

Valley

19
Q

Reverse fault causes what?

A

Mountains

20
Q

A strike-slip fault causes what?

A

Ridge

21
Q

Trace of fault on the surface of the earth

A

Fault line

22
Q

It is the energy released

A

Magnitude

23
Q

The effects on people or surroundings

A

Intensity

24
Q

Change in shape or size

A

Strain

25
Q

Depression on the sea floor

A

Trench

26
Q

giant wave/tsunami

A

Seiches

27
Q

sudden movement along faults and plate boundaries

A

Tectonic earthquake

28
Q

caused by the movement of magma beneath the surface of the earth

A

Volcanic earthquake