Earthquake Flashcards

1
Q

What is an earthquake

A

A shock or series of shocks caused by a sudden earth movement

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2
Q

What is the focus

A

The point in the earths crust where the earthquake occurs

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3
Q

Epicentre

A

The point on the earths surface directly above the focus, where its effects are felt first

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4
Q

The main belts or lines of earthquakes are

A

Around the Pacific Ocean
Down the middle of the Atlantic
In a line linking Southern Europe with Eastern Asia

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5
Q

Earthquakes occur

A

At plate margins because this is where friction occurs and stresses build up as sections of crust move past

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6
Q

Liquefaction

A

Rock or soil contains water is shaken by an earthquake. The water rises to the surface and turns the soil to liquid mud.

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7
Q

Tsunami

A

Large wave of sea water, caused by an earthquake under the sea. The shock waves create small on the ocean surface as they move towards shore they become much larger

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