Rivers

Question 1

Source

Answer 1

What a river rises in high ground

Question 2

Course

Answer 2

When the river flows down a slope

Question 3

Mouth

Answer 3

When the river reaches the sea

Question 4

What are the drainage basin features

Answer 4

Tributary
Confluence
Mouth

Question 5

Tributary

Answer 5

A stream of river which joins a larger river

Question 6

Confluence

Answer 6

A place where 2 or more rivers meet

Question 7

Mouth

Answer 7

The place where the river enters the sea/lake

Question 8

How does a river transport its load

Answer 8

Traction
Saltation
Suspension
Solution

Question 9

Traction

Answer 9

Pushing heavy materials

Question 10

Saltation

Answer 10

Materials hop along rivers bed (pebbles)

Question 11

Suspension

Answer 11

Carry lightmaterials such as clay, silt and sand

Question 12

Solution

Answer 12

Carry dissolved materials such as calcium

Question 13

Name one feature of a rivers youthful stage

Answer 13

V shaped valley

Question 14

Describe a v shaped valley

Answer 14

Has steep sides and narrow floors

Question 15

How are v shaped valleys formed?

Answer 15

• The river erodes downwards which steepens the valley
• mass movement causes the sides of the valley to move down-slope into the river
• this gives valleys their v-shape
• the materials that fall into the river are then transported off in the rivers load.

Question 16

Landforms of the mature stage of the river

Answer 16

Meander

Question 17

What is an oxbow lake

Answer 17

A horseshoe shaped lake found beside a river

Question 18

How is an oxbow lake formed

Answer 18

• By continuous erosion and deposition
• Eventually the river cuts through the neck of the meander
• deposition then occurs which leaves the oxbow lake separated from the river

Question 19

Name a landform of the old stage of a river

Answer 19

On bow lake

Question 20

What are levees

Answer 20

Raised banks of deposited materials found along the banks of rivers

Question 21

How is a levee formed?

Answer 21

• When the river floods, it spreads out over the flood plain. The heaviest material is deposited close to the river
• overtime and after many periods of flooding this deposition material forms levees along the banks of rivers.

Question 22

What is a dam

Answer 22

A dam is a barrier constructed across a river to control the flow or the rise of water

Question 23

Dams in Ireland

Answer 23

Dams have been built on a number of Irish rivers
3 dams have been built in the river Liffey
The largest dam traps water behind it which is transported to a reservoir called blessington lake

Question 24

Advantages of a dam

Answer 24

• The ESB station built into the dam generates hydroelectricity (hydro electric power = hep). This is a clean source of renewable energy.
• Supplies water

Question 25

Disadvantages of dams

Answer 25

• Takes up a lot of land

- Floods are common

Question 26

Which part of the river erodes the banks

Answer 26

Youthful stage

Question 27

What does the v shape valley do

Answer 27

Erodes banks

Question 28

What are meanders

Answer 28

Curves or bends along a river

Question 29

How are meanders formed

Answer 29

They are formed by erosion and deposition. Erosion and deposition occur on opposite sides of the river. The continues making the bends sharper.