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GEOGRAPHY > PLATE TECTONICS > Flashcards

PLATE TECTONICS Flashcards

0
Q

PLATE

A

rigid section of the earths crust

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1
Q

LITMOSPHERE

A

top of mantle and the crust

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2
Q

FOLD MOUNTAINS

A

destructive

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3
Q

VOLCANOES

A

destructive & constructve

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4
Q

EARTHQUAKES

A

constructive & conservative

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5
Q

OUTER CORE

A

iron & nickel, semi molten

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6
Q

INNER CORE

A

^6000 degrees, solid

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7
Q

MANTLE

A

semi molten, convection currents

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8
Q

OCEANIC

A

mainly basalt, subducts

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9
Q

CONTINENTAL

A

older than oceanic

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10
Q

DESTRUCTIVE

A

oceanic under continental
continental folds up & oceanic melts due to heat and pressure
magma rises and explodes as lava

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11
Q

CONSTRUCTIVE

A

plates diverge, magma rises & quakes
magma reaches surface = new land
creates undersea mnts & v.noes
these rise & break apart = islands

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12
Q

CONSERVATIVE

A

plates in opp directions/ same at diff speeds

friction builds up = earthquakes

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13
Q

FOCUS

A

point where energy is released

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14
Q

EPICENTRE

A

point on surface directly above focus

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15
Q

HAZARD

A

phenomenon which can cause loss of life, injury economic/ environmental damage

16
Q

ACTIVE VOLCANOE

A

erupted in last century

17
Q

DORMANT VOLCANOE

A

not erupted for ventures but may erupt again

18
Q

EXTINCT VOLCANOE

A

not expected to erupt again

19
Q

LAVA BOMBS

A

chunks over 65mm diameter

20
Q

ASH CLOUD

A

small pieces of pulverised glass and rock less than 2mm diameter

21
Q

TEPHRA

A

all fragments of volcanic rock blasted into air

22
Q

LAHARS

A

mud flow, rock and water ^50km/hr

+ ice and water = 10x original size

23
Q

NUEE ARDENTE

A

viscous magma erupts at certain conditions = glowing cloud

24
Q

PYROCLASTIC FLOW

A

ground hugging avalanche or hot ask, rock and gas

25
Q

AFTERSHOCKS

A

tremors that occur after large earthquakes

26
Q

SEISMIC WAVE

A

way in which energy travels through crust during earthquake

27
Q

RICHTER SCALE

A

logarithmic scale used to express earthquake magnitude

28
Q

TSUNAMI

A

large wave generated by tectonic movements in ocean floor

GEOGRAPHY (7 decks)

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