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Geography 2nd Year > Rivers > Flashcards

Rivers Flashcards

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1
Q

Source

A

The place where river begins

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2
Q

Course

A

The route the river takes to the sea

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3
Q

Tributary

A

A small river that joins a larger river

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4
Q

Confluence

A

The point where the tributary joins the river

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5
Q

Mouth

A

The point where the river enters the sea

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6
Q

Estuary

A

The part of the mouth that is tidal

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7
Q

Basin

A

The area of land drained by a river

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8
Q

Watershed

A

The high ground separating one river basin from another

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9
Q

Youthful stage

A

Valley has a narrow floor and steep sides

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10
Q

Mature stage

A

Valley has a wider floor and the sides are more gently sloped

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11
Q

Old stage

A

Valley has a wide flat floor and gentle sides

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12
Q

Hydraulic action

A

The force of moving water wears away the banks and beds

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13
Q

Abrasion

A

Caused by rivers load striking the bed and banks of river

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14
Q

Solution

A

Rocks and soil are dissolved by acids in waters

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15
Q

Attrition

A

Rock and stone carried by the river strike off each other

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16
Q

Rolling

A

The large stones are rolled along the bed of river

17
Q

Bouncing

A

The smaller pebbles are bounced along the river bed

18
Q

Suspension

A

Light materials such as sand and silt are carried along (floating)) in water

19
Q

Solution

A

Dissolved materials are carried along by river

20
Q

What is deposition?

A

Occurs when a river drops its bed load

21
Q

Why does deposition occur?

A

Decrease in speed and volume
Increase in volume

22
Q

What is a shaped valley?

A

Feature of erosion

Process of abrasion and hydraulic action deepen river channel

23
Q

What are interlocking spurs?

A

Areas of highland that jut out on either side of river

Feature of erosion

24
Q

What are the features of the upper course?

A

Waterfall
V shaped valley
Interlocking spurs

25
Q

What is a meander?

A

Large bends in the middle course of a river

Feature of erosion

26
Q

What is a floodplain?

A

Wide area of flat land on either side of a river

Feature or deposition

27
Q

What are the features of the middle course

A

Flood plains
Meanders

28
Q

What is am oxbow lake?

A

Is a lake in the shape of a horseshoe on the floodplain of a river.

29
Q

What is a levee?

A

Long narrow ridge es of alluvium along banks of a river

Deposition

30
Q

What is a delta?

A

Triangular piece of land at mouth of river

31
Q

What are the features of lower course?

A

Oxbow lake
Levee
Delta

Geography 2nd Year (1 decks)

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