Earthquakes Flashcards

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1
Q

What is an earthquake + where does it happen

A

An earthquake is the shaking of the earth caused by the movement of the earth’s crust. Occurs at converging or passive plates

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2
Q

Seismologists

A

Scientists that study earthquakes

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3
Q

Focus

A

The place where the earthquake begins underneath the earth’s surface

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4
Q

Shockwaves

A

Seismic waves that spread out in circles from the focus

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5
Q

Epicentre

A

The point on the earth’s surface directly above the focus, where the earthquake is strongest

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6
Q

Fault

A

large crack in the earth’s crust

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7
Q

Tsunami

A

Underground earthquake -2004 Indian ocean tsunami, 220,000 dead

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8
Q

Instrument used to measure earthquakes

A

Seismograph

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9
Q

Scale used to measure earthquakes

A

Moment magnitude scale

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10
Q

How to reduce earthquake damage

A

Steel cage so that the building can sway
Deep foundation
Rubber shock absorbers

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