natural hazards Flashcards

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1
Q

geological hazards

A

occur due to tectonic plates. they include volcanoes and earthquakes.

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2
Q

meteorological hazards

A

occur due to weather and climate. include extreme weather and tropical storms.

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3
Q

the earths crust is separated into … that float on the …

A

tectonic plates
mantle

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4
Q

what are the two types of crust ?

A

continental and oceanic

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5
Q

continental crust

A

thicker and less dense

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6
Q

oceanic crust

A

thinner and more dense

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7
Q

what are the three types of plate margins ?

A

destructive , constructive , conservative

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8
Q

destructive margins

A

where two plates move towards eachother. when oceanic and continental meet, the oceanic is destroyed. volcanoes are formed here.

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9
Q

constructive margins

A

where two plates move away from eachother. this causes the mantle to release magma to fill gap , creating new crust.

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10
Q

conservative margins

A

where two plates slide past eachother but at different speed. no crust is formed or destroyed.

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