river processes and landforms

Question 1

what are the 3 fluvial processes in a river

Answer 1

erosion, transportation and deposition

Question 2

3 types of weathering

Answer 2

physical, chemical and environmental

Question 3

physical weathering

Answer 3

rock is broken down into smaller pieces. This occurs due to changes in temperature - such as freeze thaw and exfoliation

Question 4

chemical weathering

Answer 4

rocks disintegrate and dissolve in slightly acidic rainwater

Question 5

biological weathering

Answer 5

rocks are broken apart by the roots of plants

Question 6

what are the 2 types of mass movement

Answer 6

slumping and soil creep

Question 7

slumping

Answer 7

where the slope is eroded by the river. This undercuts the slope causing large scale movement of material down the slope

Question 8

soil creep

Answer 8

the influence of gravity causes weathered material to slowly move down the slope towards the river

Question 9

4 types of erosion

Answer 9

hydraulic action, abrasion, attrition and solution

Question 10

4 types of deposition and transportation

Answer 10

traction, saltation, suspension and solution

Question 11

where is vertical erosion more dominant

Answer 11

in the upper course

Question 12

where is lateral erosion more dominant

Answer 12

in the lower course

Question 13

deposition

Answer 13

when rivers dont havee enough energy to transport materials it drops them.

Question 14

bedload

Answer 14

largest materials that are deposited first

Question 15

alluvium

Answer 15

lighter materials that are carried further downstream eg.sand

Question 16

long profile

Answer 16

shows the changes in the rivers gradient from source to mouth

Question 17

upland areas of a river

Answer 17

waterfall, gorges, V-shaped valleys and interlocking spurs