Rivers

Question 1

Drainage Basin

Answer 1

An area of Land drained by a river and its Tributaries

Question 2

Tributary

Answer 2

A small stream that joins with a large river

Question 3

Source

Answer 3

Start of the river

Question 4

Watershed

Answer 4

Edge of river basin

Question 5

Mouth

Answer 5

End of the river USUALLY where it joins the SEA

Question 6

V-shaped valley

Answer 6

Upper course of the river
Steep sided and V- shaped Valley
Narrow shallow and turbulent River

Question 7

Floodplain

Answer 7

Middle Course
Wider flat floor valley
Wider and deeper River

Question 8

Levees

Answer 8

Lower Course
Very wide and flat valley
Wide and deep River with LARGE SEDIMENT LOAD

Question 9

Upper Course

Answer 9

V-shaped Valley 
Low velocity of water 
Some load
River shallow 
Waterfalls

Question 10

Middle Course

Answer 10

Wide valley
Oxbow lakes and meanders
River wider and deeper
More Big Rocks

Question 11

Lower course

Answer 11

Very wider and flat valley
River wide deep with LOTS Of small sediment load (particle rocks)
Velocity very high fast river.

Question 12

River erosions

Answer 12

Hydraulic action - force of water hitting the river bed and banks
Abrasion- The load(rock) carried by the river hits bed banks removing particles of rocks
Attrition- Rocks rubbing against each other smoothening the rocks
Solution- Rock(chalk or limestone) slowly dissolved by river that flows over it ( soluble in mildly acidic river)

Question 13

4 types if transportation

Answer 13

Solution-dissolved load
Suspension-small sediment held in the river
Traction-large particles rolled on river bed
Saltation- Particles to heavy to be suspended

Question 14

When does deposition take place

Answer 14

Larger ROCKS deposited in UPPER COURSE - transported for SHORT DISTANCES

Finer Sediment carried FURTHER DOWNSTREAM (Middle Course) Held in SUSPENSION

Large amount of deposition occurs at mouth of the river - Lower Course