Natural Hazards Flashcards

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0
Q

What is the name of the boundary where two plates are going alongside each other

A

Conservative plate boundary

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1
Q

What is the name of the boundary where two plates are going towards each other

A

Destructive plate boundary

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2
Q

What is the name of the boundary where two plates are going away from each other

A

Constructive plate boundary

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3
Q

Give an example of a destructive plate boundary

A

Nazca plate dives underneath the South American plate.

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4
Q

Give an example of a conservative plate boundary

A

Pacific plate NA plate

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5
Q

Give an example of a constructive plate boundary

A

Eurasian plate NA plate

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6
Q

What are the earths layer and in what order

A

Crust
Mantle
Outer core
Inner core

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7
Q

What are the state of matters of the layer of the earth

A

Crust: Solid
Mantle: Liquid
Outer core: semi molten
Inner core: solid

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8
Q

What is a hazard

A

An event that has the potential to harm people

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9
Q

What is a disaster

A

An event that has harmed people

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10
Q

What is a subduction zone

A

The subduction zone is the place where two plates come together, one riding over the other.

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11
Q

What is a fold mountain

A

Mountains formed by folding layers of the earth one upon the other, when tectonic plates clash

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12
Q

Give an example of a fold mountain range

A

Himalayas

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13
Q

What is an oceanic trench

A

A long narrow depression or hole on the sea floor

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14
Q

What is oceanic crust

A

Top layer of crust, about 4-7 miles thick, made of heavy rock like basalt

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15
Q

What is continental crust

A

Top layer of crust, 19 miles thick, made of light rock like granite

16
Q

If oceanic and continental crust were to clash, who would go under

A

Oceanic, as it is heavier

17
Q

What is the focus of an earthquake

A

The exact point where the earthquake originates from

18
Q

What is the epicentre of an earthquake

A

The point above the focus of an earthquake

19
Q

What is a seismograph

A

Seismographs are instruments that measure motions of the ground, in the Richter scale.

20
Q

What is the Richter scale

A

a numerical scale, from about 1 to about 9, for expressing the magnitude of an earthquake