6 Why are rivers important? Flashcards

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1
Q

source

A

the point at which a river starts to flow

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2
Q

mouth

A

the end of the river, where it flows into a lake or the sea

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3
Q

evaporation

A

conversion of a liquid into a vapour or gas

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4
Q

condensation

A

conversion of vapour or gas into a liquid

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5
Q

precipitation

A

water falling from the sky in the form of rain, hail, snow, etc.

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6
Q

interception

A

precipitation being caught by leaves etc.

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7
Q

infiltrating

A

water soaking into soil

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8
Q

surface run off / overland flow

A

water running over the surface of the land

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9
Q

throughflow

A

water that has soaked into soil and is flowing towards the river

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10
Q

groundwater flow

A

water which has soaked into the rock layer and is flowing towards the river

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11
Q

watershed

A

area from which water drains into one river

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12
Q

abrasion

A

materials carried by the river hit rocks and wear them away

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13
Q

attrition

A

materials carried by the river hit each other and wear each other away, becoming smaller rounder

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14
Q

hydraulic action

A

water flows against a rock surface, wearing it away

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15
Q

corrosion

A

rock breaking down due to a chemical reaction

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16
Q

suspension

A

the water carries along fine, light particles of material

17
Q

traction

A

boulders and large rocks are slowly rolled along the bed of the river

18
Q

solution

A

the dissolved material is transported

19
Q

saltation

A

small pebbles and stones are bounced along the river bed

20
Q

deposition

A

takes place when a river slows down and no longer has the energy to carry the material it is transporting, so drops some of the material

21
Q

erosion

A

the wearing away of the banks and bed of the river by the power of flowing water in the channel

22
Q

transportation

A

the river carry material along the river