Earthquakes - Topic 1 Flashcards

1
Q

What is an ‘Earthquake’?

A

A sudden violent movement of the ground, which is caused by pressure being released after two plates, oceanic and continental, collide.

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2
Q

How is the pressure caused in an Earthquake?

A

By plate movement

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3
Q

Explain why earthquakes occur at destructive plate margins

A

Point 1: Because the two plates, Oceanic and Continental, collide
Point 2: The Oceanic plate is denser than the continental plate, so it sinks below it
Point 3: The Oceanic plate sinking below the Continental plate is known as subduction
Point 4: Volcanoes cannot take place at a destructive plate margin

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4
Q

Explain why earthquakes do not always cause the most deaths

A

Population density may be low so not many people in the danger area
Some areas may just be poor so buildings just collapse killing only a few people

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