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geography grade 8. > geography key terms chp 1 and 5 > Flashcards

geography key terms chp 1 and 5 Flashcards

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1
Q

rock

A

the hard material that makes up earths surface

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2
Q

minerals

A

Natural compounds that have a chemical name and formula

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3
Q

sedimentary rock

A

rock formed through sedimentation

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4
Q

igneous rock

A

rock formed through solidification of molten magma

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5
Q

Metamorphic rock

A

forms when a rocks basic structure is changed

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6
Q

weathering

A

the process of brealing down a rock through pressure, temperature, or chemical reactions

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7
Q

physical weathering

A

Weathering that breaks rocks down into bits

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8
Q

Chemical weathering

A

Rock that is brocken down by chemical reactions

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9
Q

Deposit

A

To drop material

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10
Q

Plates

A

Earths hard outer parts which are broken down into big slabs

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11
Q

Biodiversity

A

The variety of living things in a place

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12
Q

fertilisers

A

Substances added to soil to make it more fertile

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13
Q

Bedrock

A

The solid rock underlying the soil

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14
Q

continental crust

A

the crust that forms land

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15
Q

oceanic crust

A

The crust under the ocean

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16
Q

Lithosphere

A

a hard rigid layer of rock

17
Q

boundary/margin

A

the region where 2 plates meet

18
Q

slab pull

A

a plate that is moved along by its sinking edge

19
Q

Diverging

A

Moving apart

20
Q

Converging

A

Moving into eachother

21
Q

Conservative plate

A

a margin where plates slide past eachother

22
Q

Focus

A

The point where the earhtquake waves have started

23
Q

Seismic waves

A

Waves released when an earthwuake occurs

24
Q

Epicentre

A

The point directly above the focus on the earths surface

25
Q

Aftershocks

A

Little earthquakes as the rock settles into its new position

26
Q

Magnitude

A

How much energy an earthquake gives out

27
Q

Seismometers

A

Machines used to measure earthquakes

28
Q

Richter scale

A

Used to measure magnitude

29
Q

Tsunami

A

Waves generated by an earthquake on the ocean floor

geography grade 8. (2 decks)

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