Glacial Erosion and Landforms Concepts

The video explains glaciers as moving ice masses that cause glacial erosion, shaping landscapes through processes like plucking and abrasion. It describes landforms such as cirques, tarns, glacial horns, arêtes, and roche moutonnée, highlighting their formation and characteristics.

What is the primary reason glaciers rarely pose a direct threat to humans?

• They move very slowly.

• They are found only in remote areas.

• They are always stationary.

• They are too small to cause harm.

What is the process called when glaciers pick up large chunks of rock?

• Sedimentation

• Erosion

• Plucking

• Abrasion

How does plucking contribute to the landscape changes caused by glaciers?

• By melting the ice

• By transporting rocks

• By increasing glacier speed

• By creating new glaciers

What is abrasion in the context of glacial erosion?

• The formation of new ice layers

• The melting of ice

• The scraping of particles against each other

• The freezing of water

What are glacial striations?

• Circular patterns in ice

• Smooth surfaces on glaciers

• Long scratches on rocks

• Deep holes in the ice

What is a cirque?

• A large ice sheet

• A narrow mountain ridge

• A round hollow with steep sides

• A sharp mountain peak

What is a tarn?

• A small mountain lake

• A type of glacier

• A steep mountain slope

• A glacial valley

What is a glacial horn?

• A sharp angular peak

• A deep valley

• A flat plateau

• A rounded hill

What is an arête?

• A smooth rock surface

• A rounded hilltop

• A deep glacial lake

• A sharp narrow mountain ridge

What is distinctive about a roche moutonnée?

• It has a smooth rounded side and a steep ragged side.

• It is a flat ice sheet.

• It is a deep glacial valley.

• It is a sharp mountain peak.