Formation of a V shaped valley (rivers)

Question 1

Point 1
(Vertical erosion in the form of…)

Answer 1

Vertical erosion, in the form of abrasion, hydraulic action, in the river channel results in the formation of a steep sided valley.

Question 2

Point 2
(This is greater at…)

Answer 2

This is greater at times of flood when the water has more erosive power.

Question 3

Point 3
(Hydraulic action erodes…)

Answer 3

Hydraulic action erodes the riverbed as air is compressed into the river bank causing materials to be dislodged.

Question 4

Point 4
(Abrasion is when…)

Answer 4

Abrasion is when the force of the water throws bedload against the banks causing erosion.

Question 5

Point 5
(Solution may erode…)

Answer 5

Solution may erode some rock types i.e limestone, when soluble rocks react with acids in the water.

Question 6

Point 6
(Gradually, mass movement of…)

Answer 6

Gradually. mass movement of materials occurs down the valley sides, creating the V shape - a narrow bottomed valley which is mainly filled by the river.

Question 7

Point 7
(This material is then gradually…)

Answer 7

This material is then gradually transported away by the river when there is enough energy to do so.