Glaciation

What is a glacier?

• A glacier is any piece of ice that moves.

• A glacier is a mass of ice that thaws and re-freezes repeatedly.

• To be considered a glacier, a mass of ice must be at least 1 mile thick

• Glaciers are masses of ice made made up of snow that has accumulated and compacted over time .

Glaciers are found:

• in locations where snowfall exceeds snowmelt

• everywhere on earth

• only near the north and south poles

• in locations where snowmelt is greater than snowfall

What are the two MAIN types of glaciers?

• tidewater & continental

• valley & alpine

• continental & alpine

• hanging & cirque

Where is earth's largest glacier?

• Alaska

• Iceland

• Greenland

• Antarctica

Why do glaciers move?

• due to their immense weight

• gravity

• their weight AND gravity

• They DON'T move!

The bottom portion of a glacier is usually...

• solid

• liquid

Which statement about glaciers is NOT true?

• Glaciers move so slowly that their movement cannot be noticed by humans.

• Glaciers change the surface of the land

• Glaciers transport sediment.

• Glaciers are found on every continent.

A continental glacier is also known as...

• an ice sheet

• an ice cap

• valley glacier

• alpine glacier

Which letter represents the shape of valleys created by glaciers?

• Y

• O

• U

• V

Which types of locations have conditions that are NOT likely to form glaciers?

• places near the north and south poles

• places with high elevation and low temperature

• places with low elevation high temperature

• places where the temperature remains cold all year round