Erosion

Question 1

Hydraulic action

Answer 1

When water and air is forced into cracks and break the rock

Question 2

Corrasion

Answer 2

When rocks rub against the river bed

Question 3

Abrasion

Answer 3

Rocks being carried along by the river wear down the rocks by the bed

Question 4

Attrition

Answer 4

Rocks being carried by the river bash into each other and break into smaller pieces

Question 5

Corrosion/solution

Answer 5

Soluble partials in the rock are being dissolved by the river