End of topic rivers revision

Question 1

Define source

Answer 1

Where a river begins

Question 2

Define drainage basin

Answer 2

The area from which water drains into the river

Question 3

Define watershed

Answer 3

An imaginary line that separates two drainage basins

Question 4

Confluence

Answer 4

The point where two rivers join together

Question 5

Tributaries

Answer 5

Small rivers which join the main river

Question 6

Flood plain

Answer 6

Land that floods when a rapier overflows

Question 7

Mouth

Answer 7

Where the river flows into the sea or lake

Question 8

River bed

Answer 8

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

upper course

Answer 11

It’s the steepest part of the river it’s usually small but river flows quickly.

Question 12

Middle course

Answer 12

Flows slowly as it starts to transport sediment
Open v shape erosion and deposition start to occur

Question 13

Lower course

Answer 13

V shape valley is so wide that the sides have disappeared, river approaches it’s mouth

Question 14

Define river long profile

Answer 14

Long profile shows how a rivers gradient changes as it flows from its source to its mouth

Question 15

Define erosion

Answer 15

The gradual removal of rock from a rivers bank and bed

Question 16

Abrasion/corrosion

Answer 16

Rocks carried along by the river wear down the river bed and banks

Question 17

Hydraulic action

Answer 17

The force of the river against the banks can cause air to be trapped in cracks and crevices

Question 18

Solution/corrosion

Answer 18

Soluble particles and minerals are dissolved into the river

Question 19

Attrition

Answer 19

Rocks being transported by the river smash together and break into smaller rounded smoother pieces

Question 20

V-shaped valleys formed

Answer 20

Eroding down
Weathering on the sides
Looses material creeps down the slope cause of gravity = v-shaped valley