Ch 5: Rivers

Question 1

Hydraulic action

Answer 1

The weight and speed of river loosen rocks from the riverbed

Question 2

Abrasion

Answer 2

Wearing away of the bed and its sides by the load

Question 3

Attrition

Answer 3

The material is worn down, smoothed and rounded by rocks hitting against each other

Question 4

Solution

Answer 4

Rocks are dissolved by minerals

Question 5

Source

Answer 5

The point where a river begins

Question 6

Course

Answer 6

The route taken by a river

Question 7

Tributary

Answer 7

A small river that joins a larger river

Question 8

Confluence

Answer 8

The point where the tributary joins a river

Question 9

Mouth

Answer 9

the part where the river enters the sea

Question 10

Estuary

Answer 10

The part of a river mouth that is tidal

Question 11

Life cycle of a river

Answer 11

Youthful stage
Mature stage
Old stage

Question 12

Features of a youthful river

Answer 12

V-shaped valley
Interlocking spurs
Waterfalls

Question 13

V-shaped Valleys

Answer 13

when a river erodes downwards

Question 14

Interlocking Spurs

Answer 14

The river doesn’t have the power to go through obstacles so it goes around them

Question 15

Waterfalls

Answer 15

Where the river flows or falls over a vertical slope

Question 16

Features of the mature stage

Answer 16

Meanders

Oxbow Lake

Question 17

Meanders

Answer 17

Formed by erosion on the outer bank and deposition on the inner bank

Question 18

Oxbow lake

Answer 18

Horseshoe shaped lake that was a river meander but then cut off

Question 19

Features of the old stage

Answer 19

Leeves

Delta

Question 20

Leeves

Answer 20

Raised bank of alluvium

Question 21

Delta

Answer 21

A triangular area of land where a river flows into the sea

Question 22

HEP

Answer 22

Hydro-electric power