Glacial Erosion and Landscape Transformation

The video explains the erosive power of glaciers, highlighting processes like plucking and abrasion. Plucking involves glaciers pulling rocks from the ground, creating jagged landscapes. Abrasion smooths surfaces as glaciers drag embedded rocks across the land. Glaciers flow downhill, widening V-shaped valleys into U-shaped ones, demonstrating glacial erosion.

What role do cracks in the land surface play in glacial erosion?

• They cause glaciers to melt faster.

• They make it easier for glaciers to erode the land.

• They prevent glaciers from forming.

• They have no effect on glacial erosion.

What is the process called when rocks are pulled from the ground and transported by a glacier?

• Plucking

• Abrasion

• Thawing

• Freezing

How does a glacier smooth and polish the landscape?

• By dragging embedded rocks and debris across it

• By depositing new soil

• By creating new cracks

• By melting and refreezing

What are striations?

• Deep valleys formed by glaciers

• Scratches left on the landscape by glaciers

• Ice formations on the glacier surface

• Large rocks deposited by glaciers

How do glaciers transform V-shaped valleys?

• By creating new cracks in the valley walls

• By filling them with water

• By widening and deepening them into U-shaped valleys

• By making them narrower

In what way do glaciers flow similarly to water?

• They flow uphill

• They flow by the easiest routes downhill

• They flow in a straight line

• They flow in circular patterns