River Processes Quiz

What type of river erosion occurs when rocks and pebbles grind along the river bed, wearing it away?

• Hydraulic action

• Abrasion

• Attrition

• Solution

Which of the following is NOT a method of river transportation?

• Saltation

• Traction

• Suspension

• Condensation

Deposition in a river occurs when:

• The water speed increases

• The river carries too much sediment

• The water is too cold

• The slope of the river increases

What is the process called when the river water dissolves and erodes certain types of rocks?

• Hydraulic action

• Abrasion

• Attrition

• Corrosion

What term describes the movement of fine, light material being carried along by the river?

• Traction

• Saltation

• Suspension

• Solution

Which process describes large boulders and rocks being rolled along the river bed?

• Traction

• Saltation

• Suspension

• Solution

Hydraulic action involves:

• The force of the water breaking rock particles away from the river channel

• The chemical action of river water

• Rocks and stones knocking together and breaking into smaller pieces

• The transportation of sediment in the flow of the river

Attrition refers to:

• The dissolving of soluble materials from the river bed and banks

• The scraping and wearing away of the river bed by the load

• The reduction in size of particles as they collide with each other

• The lifting of rocks and sediment by the force of the water

Which factor does NOT influence the rate of river erosion?

• The volume of water in the river

• The gradient of the river slope

• The amount of vegetation along the riverbanks

• The color of the river water

Which of the following best describes the process of 'saltation' in river transportation?

• Large boulders rolling along the riverbed

• Small pebbles and stones bouncing along the riverbed

• Minerals dissolving in the water

• Light material floating in the water