Unit 4B: Glaciers and Deserts Slides

A massive, long-lasting moving accumulation of ice and snow that forms only on land

A large body of water that freezes in winter and melts in summer

A mountain covered with snow all year round

A river that flows through icy regions

Occur only in polar regions

Usually colder and wetter

Often constrained to valley channels

Growth depends on temperature and precipitation

They form in the lower plastic zone of the glacier.

They form due to melting at the glacier's surface.

They form at the glacier terminus.

Arête

Horn

Cirque

Valley glacier

A small glacier joins a much larger one, leaving a valley hanging above the main valley.

A river carves a deep channel through a mountain range.

A glacier deposits sediments at the base of a mountain.

A valley is flooded by incoming seas as glaciers melt.

Terminal moraine

Lateral moraine

Medial moraine

Ground moraine

Medial moraine

Terminal moraine

Lateral moraine

Ground moraine

Elongated, tear-shaped hills

Form near the terminus of a glacier

Composed of sorted and stratified sediments

Slope more gently on one side

Glaciers form only on land where the amount of snow that falls exceeds the amount that melts.

Glaciers form in the ocean where icebergs accumulate.

Glaciers form in deserts where sand turns into ice.

Glaciers form only during winter when temperatures drop below freezing.

Forest

Valley

Canyon

Desert

When the mountains block the passage of rain-producing weather systems and cast a "shadow" of dryness behind them.

When it does rain for many years

When it rains and is sunny at the same time

Sun

Wind

Rain