Waterfalls and Gorges

The video explains various erosional landforms, focusing on processes like attrition, abrasion, hydraulic action, and corrosion. It describes how these processes shape river landscapes, forming features such as V-shaped valleys, rapids, interlocking spurs, waterfalls, and gorges. The video highlights the role of rock types and water flow in these formations.

What is the process called when rocks carried by river water collide and break into smaller pieces?

• Corrosion

• Attrition

• Hydraulic action

• Abrasion

How does hydraulic action contribute to riverbank erosion?

• By chemically reacting with the rock

• By carrying rocks downstream

• By trapping and pressurizing air in cracks

• By dissolving minerals in the rock

What type of erosion is caused by slightly acidic rainwater flowing over limestone?

• Hydraulic action

• Attrition

• Abrasion

• Corrosion

What landform is created by vertical erosion in the upper course of a river?

• Interlocking spur

• Plunge pool

• Gorge

• V-shaped valley

What happens when the overhang of a waterfall becomes too large?

• It forms a new river

• It creates a capstone

• It becomes a rapid

• It collapses, causing the waterfall to retreat