The type of erosion when particles of load collide with each other, wearing each other down and getting smoother.

• Abrasion

• Corrosion

• Attrition

• Hydraulic action

The direction of most erosion in a river's upper course is...

• vertical

• lateral

The direction of most erosion in a river's middle and lower course is...

• vertical

• lateral

The type of erosion where the sheer force of the water breaks away parts of the bed and banks.

• Corrosion

• Abrasion

• Hydraulic action

• Attrition

The type of erosion where the river water dissolves certain salts and minerals in the rock.

• Hydraulic action

• Abrasion

• Corrosion

• Attrition

The type of erosion where particles of load knock and rub against the bed and banks.

• Abrasion

• Attrition

• Corrosion

• Hydraulic action

The type of transportation where larger rocks and stones roll along the river bed.

• Saltation

• Traction

• Suspension

• Solution

The type of transportation where smaller stones bounce and skip along the river bed.

• Traction

• Saltation

• Suspension

• Solution

The type of transportation where tiny particles are carried within the river flow, making it cloudy.

• Suspension

• Saltation

• Traction

• Solution

The type of transportation where dissolved salts and minerals are carried in the water.

• Solution

• Saltation

• Traction

• Suspension