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Geography Key Terms > Y7 Tectonic Hazards > Flashcards

Y7 Tectonic Hazards Flashcards

1
Q

Crust

A

-50°C to +50°C, made from all kinds of rocks, 5 to 100km thick

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2
Q

Mantle

A

500°C to 900°C, made from magnesium and iron, 3000km thick

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3
Q

Inner core

A

5000°C to 6000°C, made from iron and nickel liquid lava, 1260km thick

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4
Q

Outer core

A

2500°C to 4500°C, made from iron and nickel liquid lava, 2200km thick

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5
Q

Continental crust

A

25 to 100km thick, made from granite, less dense than oceanic crust

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6
Q

Oceanic crust

A

5 to 100km thick, made from basalt, denser than continental crust

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7
Q

Convection currents (of hot rock)

A

rise very slowly, cool then sink again
the movement is so powerful that it moves the crust around

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8
Q

Continental drift

A

the study of the movement, collision, and division of continents

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9
Q

Fossil correlation

A

when ancient fossils are distributed in continents that are separated

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10
Q

Eurasian plate

A

Europe, and most of Asia

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11
Q

Iranian plate

A

Iran

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12
Q

Arabian plate

A

Arabia

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13
Q

African plate

A

Africa

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14
Q

Indo-Australian plate

A

Australia

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15
Q

North American plate

A

North America

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16
Q

Caribbean plate

A

Central America

17
Q

South American plate

A

South America

18
Q

Antarctic plate

A

Antarctica

19
Q

Sedimentary rock

A

rocks made from layers of sediment and dead creatures

20
Q

Igneous rock

A

rocks that are made from magma that has cooled and solidified

21
Q

Metamorphic rock

A

rocks formed from existing rocks under extreme pressure

22
Q

Margin

A

a boundary of a tectonic plate

23
Q

Constructive plate boundary

A

the plates move apart causing magma to release
aftereffects: volcano, volcanic island

24
Q

Destructive-oceanic/continental plate boundary

A

the oceanic crust moves, the oceanic crust subducts and causes magma to release
aftereffects: earthquake, highlands

25
Q

Destructive-collision plate boundary

A

when two continental plates collide
aftereffects: earthquake, volcano

26
Q

Conservative plate boundary

A

when two plates slide in the same direction, one moving faster than the other, causing them to snag and build up pressure
aftereffects: crack

Geography Key Terms (3 decks)

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