weathering Flashcards

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1
Q

what is physical weathering

A

the mechanical breakdown of rocks with no chemical change

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2
Q

what is chemical weathering

A

the breakdown/decomposition of rock due to chemical change

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3
Q

the mechanical breakdown of rocks with no chemical change

A

physical weathering

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4
Q

the breakdown/decomposition of rock due to chemical change

A

chemical weathering

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5
Q

what is frost shattering

A

when water gets trapped in rocks it freezes overtime and expands by 9%, causing rock to expand and break

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6
Q

what is salt crystallisation

A

sea water is evaporated from the rocks surface, it leaves behind salt crystals which increase in volume and put pressure on the rock

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7
Q

what is pressure release

A

the expansion of rock when there is less pressure from material above it

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8
Q

what is exfoliation

A

during the day the sun heats up rock and at night it cools, this gradually disintegrates the outer layer of the rock like an onion

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9
Q

when water gets trapped in rocks it freezes overtime and expands by 9%, causing rock to expand and break

A

frost shattering

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10
Q

sea water is evaporated from the rocks surface, it leaves behind salt crystals which increase in volume and put pressure on the rock

A

salt crystalisation

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11
Q

the expansion of rock when there is less pressure from material above it

A

pressure release

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12
Q

during the day the sun heats up rock and at night it cools, this gradually disintegrates the outer layer of the rock like an onion

A

exfoliation

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13
Q

what is oxidation

A

oxygen reacts with minerals and forms iron oxide, this overtime cause the rock to rust and form a ferric state

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14
Q

what is hydration

A

water is absorbed by rocks and causes them to expand

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15
Q

what is hydrolysis

A

hydrogen in the sea water reacts with minerals, they then breakdown and form clays

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16
Q

what is solution

A

rocks dissolve in water

17
Q

what is chelation

A

acids released by plants breakdown rock

18
Q

oxygen reacts with minerals and forms iron oxide, this overtime cause the rock to rust and form a ferric state

A

oxidation

19
Q

water is absorbed by rocks and causes them to expand

A

hydration

20
Q

hydrogen in the sea water reacts with minerals, they then breakdown and form clays

A

hydrolysis

21
Q

rocks dissolve in water

A

solution/corrosion

22
Q

acids released by plants breakdown rock

A

chelation

23
Q

how does oxygen cause rocks to weather

A

it reacts with minerals and creates iron oxide which rusts the rock

24
Q

how does hydrogen lead to the breakdown of rock

A

it reacts with the minerals and forms clay