Water on the land

Question 1

Explain the 4 main erosion processes in rivers

Answer 1

Abrasion (corrasion) - sandpaper
Attrition - collisions make rounder rocks
Solution (corrosion) - acidic water dissolve channel
Hydraulic action - water forced into cracks

Question 2

Explain the 4 main methods of river transportation

Answer 2

Traction - boulders rolled
Saltation - small rocks bounce along riverbed
Suspension - fine material suspended in water
Solution - dissolved load (soluble in water)

Question 3

What are the factors that affect river discharge?

Answer 3

Weather
Relief 
Rock type
Soil type
Deforestation
Urbanisation