erosion and deposition landforms

Question 1

what is erosion?

Answer 1

wearing away and removal of material by a moving force (e.g. river).

Question 2

what is deposition?

Answer 2

when material being transported by the river is dropped due to a loss of energy.

Question 3

what is a meander?

Answer 3

a meander is a bend in a river, they form in the middle and lower course of the river and are created by lateral erosion and deposition.

Question 4

how do meanders form?

Answer 4

meanders are bends in a river. water flows faster on the outside of the bend, so erosion occurs through processes like abrasion. this creates a river cliff. velocity is slower on the inside of the inside of the bend, so deposition occurs, creating a slip off slope. this continues overtime, making the meander more sinuous it migrated across the valley through lateral erosion.

Question 5

deposition creates a what?

Answer 5

slip off slope.

Question 6

oxbow lakes

Answer 6

1. water is fastest on the outside of meander bend so erosion occurs thorugh processes like abrasion. rhis creates a river cliff.
2. deposition occurs on the inside of the bend as water is slower creating a slip of slope.
3. overtime, the meander becomes more bendy and migrates across the valley through lateral erosion.
4. overtime, the bends grow close narrowing the neck.
5. during a flood the river cuts through the neck creating a straighter channel.
6. an oxbow lake is created.