8P Glaciation Quiz

When accumulation is less than (<) ablation, a glacier...

• Advances

• Retreats

• Does not move

When accumulation is greater than (>) ablation, the glacier...

• Advances

• Retreats

• Does not move

When accumulation and ablation are equal, the glacier...

• Advances

• Retreats

• Does not move

A mixture of rocks, clay, sand and other sediment dropped by a glacier is known as...

• Till

• Erosion

• Deposition

• Transportation

Select the key glacial process.

As the glacier moves downhill, rocks that have been frozen into the base and sides of the glacier scrape the rock beneath. The rocks scrape the bedrock like sandpaper, leaving scratches.

• Freeze Thaw Weathering

• Plucking

• Abrasion

Select the key glacial process.

Rocks become frozen into the bottom and sides of the glacier. As the glacier moves downhill it 'pulls' the rocks frozen into the glacier from the ground.

• Freeze Thaw Weathering

• Plucking

• Abrasion

Select the key glacial process.

During the day when temperatures are higher, the snow melts and water enters the cracks in the rock. When the temperature drops below 0°C the water in the crack freezes This makes the crack larger. As this process is repeated through continual thawing and freezing the crack gets larger over time. Eventually pieces of rock break off.

• Freeze Thaw Weathering

• Plucking

• Abrasion

Transportation is ...

• when the glacier carries away material it has eroded

• the wearing away of rocks and stones by a glacier

• when the glacier drops material as the front of it melts

Erosion is ...

• when the glacier carries away material it has eroded

• the wearing away of rocks and stones by a glacier

• when the glacier drops material as the front of it melts

Deposition is ...

• when the glacier carries away material it has eroded

• the wearing away of rocks and stones by a glacier

• when the glacier drops material as the front of it melts