rivers

Question 1

what is abrasion

Answer 1

it is when a material carried in the river rubs and hits the side and banks of the river eroding it

Question 2

what is attrition

Answer 2

it is when particles carried down the river collide into each other making each other smooth.

Question 3

what is solution

Answer 3

river water is slightly acidic so it can dissolve some rocks and minerals

Question 4

hydraulic action what is it

Answer 4

the sheer force of the water hitting the bed forces the water into cracks breaking them apart

Question 5

what is traction and when does it occur

Answer 5

it occurs during flood and it is when big rocks and boulders roll along the bed

Question 6

what is saltation

Answer 6

it is when small pebbles, sand and gravel bounce along the river bed

Question 7

what is suspension

Answer 7

fine particles of silt and clay sized substances are carried in the river

Question 8

upper course of the river Tees features

Answer 8

narrow steep sided valley , river occupies the whole valley floor(interlocking spurs)
vertical erosion downwards
slow velosity?
large and angular

Question 9

middle course of the middle tees

Answer 9

wider valley with distinct sides and flat flood plain(meanders, oxbow lakes)
flatter erosion, transport processes and deposition
fast velocity
rounded pebbles

Question 10

lower course river Tee

Answer 10

very wide flat flood plain, valley sides9meanders levees)
transport processes and deposition
slows as it meets the sea
muds and silts