TOPIC 1: RIVERS

Question 1

Source

Answer 1

Where a river begins

Question 2

Drainage basin

Answer 2

The area from which water drains into the river

Question 3

Watershed

Answer 3

An imaginary line that separates two drainage basins

Question 4

Confluence

Answer 4

The point where 2 rivers join together

Question 5

Tributaries

Answer 5

Smaller rivers which join the main river

Question 6

Flood plain

Answer 6

Land that floods when a river overflows

Question 7

Mouth

Answer 7

Where the river flows into the sea or lake

Question 8

River bed

Answer 8

The bottom of a river channel

Question 9

River bank

Answer 9

The side of a river channel

Question 10

Channel

Answer 10

Rivers flow in this

Question 11

The upper course

Answer 11

The steepest part of land in a river.
Usually small but flows fast
Creates a V shaped valley

Question 12

The middle course

Answer 12

The river flows slowly
Starts to transport sediment
Flood plains begin to develop

Question 13

The lower course

Answer 13

V shape is so wide the valley has disappeared
River approaches its mouth
River moves slowly across a large floodplain
Deposition is the main process occurring

Question 14

Abrasion

Answer 14

Bed and banks are worn down by the rivers load. The river throws these particles against the bed and banks, sometimes at high velocity.

Question 15

Attrition

Answer 15

Material carried by the river bump into each other and so are smoothed and broken down into small pieces

Question 16

Corrosion

Answer 16

The chemical action of river water, the acids in the water slowly dissolve the bed and banks.

Question 17

Hydraulic action

Answer 17

This process involves the force of the water directly on to the rivers bed and banks

Question 18

Suspension

Answer 18

Fine light material is carried along in the water

Question 19

Solution

Answer 19

Minerals are dissolved in the water and carried along in solution

Question 20

Traction

Answer 20

Large boulders and rocks are rolled along the river bed

Question 21

Saltation

Answer 21

Small pebbles and stones are bounced along the river bed