hyd: rivers formations

Question 1

what is hydraulic action

Answer 1

it is when water compresses air into riverbanks causing materials to dislodge

Question 2

what is abrasion?

Answer 2

it is when water force causes bedload to be thrown against the riverbank causing a scouring action

Question 3

what is attrition?

Answer 3

this is when load in the water collide with eachother in the water becoming smaller and rounder

Question 4

define solution

Answer 4

this is when the acids in the water dissolves soluble bedrock

Question 5

where abouts do rivers begin ?

Answer 5

high up in the mountains so they flow downhill fast

Question 6

what type of erosion do rivers initiate?

Answer 6

vertically eroded landscape

Question 7

by using erosional processes what does the river cut out of the landscape?

Answer 7

a deep notch

Question 8

as the river continues to erode downward what does this leave the sides exposed to?

Answer 8

freeze thaw weathering

Question 9

what does freeze thaw weathering cause?

Answer 9

it causes the rocks to be loosened and steepens the valley sides

Question 10

where does the river transport these rocks?

Answer 10

downstream

Question 11

as the rocks are transported downstream what happens to the channel?

Answer 11

it becomes wider and deeper until a v-shaped valley is created with interlocking spurs