Rivers

Question 1

What are all the parts of. DRAINAGE BASIN

Answer 1

Source, Confluence, tributary, watershed, mouth, drainage basin, river basin.

Question 2

What is a drainage basin

Answer 2

The arae of land drained by a river. Any water tgat fills in the area of land is sent to the river where its drained. Its outlined by a boundary of high grounf.

Question 3

What is a valley

Answer 3

An area with high ground on either side

Question 4

What is a floodplain?

Answer 4

The land either side of the river which may flood

Question 5

What is the Miuth of a river?

Answer 5

Where the river ends and meets the sea

Question 6

What is the confluence

Answer 6

The meeting point of two rivera

Question 7

What is a tributary?

Answer 7

A tributary is where smaller rivers meet a main rivers

Question 8

What is a river basin?

Answer 8

The area inside the watershed where all rain will collect into a river.

Question 9

What is watershed?

Answer 9

Imaginary outline of a river basin. Area of higher ground.

Question 10

What is the source of a river..

Answer 10

Where the river starts.

Question 11

Describe what the banks of a river are?

Answer 11

The edges of a river.

Question 12

What is lateral erosion(makes river wider)

Answer 12

Erosion sideways

Question 13

What is vertical erosion(makes rover deeper)

Answer 13

Erosion downwards

Question 14

What is the river bed?

Answer 14

The bottom of a river.

Question 15

What is Hydraulic action?

Answer 15

The force of a river agains the banks which causes air to be trapped in cracks. The pressure weakens the banks and gradually wears the banks away.

Question 16

What is abrasion?

Answer 16

Rocks carried along by the river run and scrape along the river bed and banks, eroding it.

Question 17

What is attrition?

Answer 17

Rocks being carried by the river smash into each other and together, into smaller and smoother and rounder pwrticles.

Question 18

Why are rocks smoother, is evudence of rocms being in a river longer

Answer 18

This is because this is evidence of attrition. Rocks carried by the river have been smoothened due to being scraped by other rocks over tim, breaking and having rounder particles. Sharp rocks havent experienced attrition yet.

Question 19

What are the 4 ways that a river TRANSPORTS sediment downstream.?

Answer 19

Solution, suspension, saltation and traction.

Question 20

What is solution?

Answer 20

Dissolved material in a river which is carried downstream.

Question 21

What is suspension?

Answer 21

Visible sediment with the water floating along

Question 22

What is saltation?

Answer 22

Pebbles that are bouncing along the beds of the river?

Question 23

What is traction?

Answer 23

The force of the river which pushes and rolls big rocks like boulders.

Question 24

When and where will a river have the most transportation of sediment?

Answer 24

Rivers need energy to transport material . When energy levels are high, large rocks and boulders are transported(traction)? Energy levels are highes from the middle course to the upper course, since the river is fsr from the sea where it loses the most energy.

Question 25

What is deposition

Answer 25

The river losing energy and drops sediment being carried. This mainly happens in the lower course where it is abiut to meet the sea

Question 26

Explain why sediment is deposited

Answer 26

Sediment is deposited when the river loses energy. As the river moves furthur downstream, the size of the rocks is decreasing as each rocks are deposited until eventually the smallest of rocks are deposited at the sea,

Question 27

(Not on rivers) why are cold environements mainlt found at high altitiudew or high latitudew or the middle of continents.

Answer 27

Due to the angle of 23.5, sunlight that reaches the equator and is passed thriuh the atmosphere, energy is lost, mewning less thermal energy will be passed along to areas of high latitiude/altitude (as there is not much land)