Rivers Quiz

What type of erosion dominates in the upper course of a river?

• Vertical erosion

• Hydraulic action

• Corrosion

• Lateral erosion

How do waterfalls form?

• Through lateral erosion

• When the river flows over hard and soft rock

• By sediment deposition

• By the river flowing over hard rock only

What is the channel width like in the lower course of a river?

• Very wide

• Very narrow

• Moderate

• Narrow

What type of valley is formed in the upper course of a river?

• Flat valley

• V-shaped valley

• U-shaped valley

• Wider valley

What happens to the velocity of water as it moves from the upper course to the lower course?

• It fluctuates

• It slows down

• It speeds up

• It remains the same

What type of landform is created by the deposition of sediment at the river's mouth?

• Oxbow lake

• Delta

• Waterfall

• Meander

How do meanders form?

• By sediment deposition only

• By hydraulic action

• Through alternating erosion and deposition

• By uniform erosion on both sides

What is the bedload like in the middle course of a river?

• Large boulders

• Smaller and smoother pebbles

• Very fine silt

• Jagged rocks

What is the primary process of erosion that occurs when water pushes into cracks in the riverbank?

• Abrasion

• Hydraulic action

• Attrition

• Corrosion

What type of erosion is dominant in the middle course of a river?

• Lateral erosion

• Vertical erosion

• Corrosion

• Hydraulic action