7.5 Glaciers

Front

What is a glacier?

Back

A glacier is a large mass of ice that moves slowly over land, formed from compacted snow.

Tags

NGSS.MS-ESS2-4

Front

What are U-shaped valleys?

Back

U-shaped valleys are valleys that have been eroded by glaciers, characterized by a wide, flat bottom and steep sides.

Tags

NGSS.MS-ESS2-2

Front

What are striations?

Back

Striations are scratches or grooves on bedrock caused by the movement of a glacier.

Tags

NGSS.MS-ESS2-2

Front

What is the difference between glacial deposits and river deposits?

Back

Glacial deposits are unsorted, while river deposits are sorted by size.

Front

What are drumlins?

Back

Drumlins are elongated hills formed by the movement of glaciers, indicating the direction of ice flow.

Front

What are kettles?

Back

Kettles are depressions or holes left in the ground after a glacier melts, often filled with water to form kettle lakes.

Tags

NGSS.MS-ESS2-2

Front

How do glaciers move?

Back

Glaciers move through a combination of internal deformation and sliding at their base.

Front

What evidence suggests that an area has been glaciated?

Back

Evidence includes U-shaped valleys, striations on rocks, and the presence of drumlins.

Front

What are finger lakes?

Back

Finger lakes are long, narrow lakes formed in areas previously covered by glaciers.

Tags

NGSS.MS-ESS2-2

Front

What is the significance of grooves and striations?

Back

Grooves and striations indicate the direction of glacier movement and the extent of erosion.

Tags

NGSS.MS-ESS2-2