Glaciers in Geography

How are glaciers formed?

• Glaciers are formed by volcanic eruptions.

• Glaciers are formed through the process of snow accumulation, compaction, and recrystallization into ice.

• Glaciers are formed by the melting of icebergs.

• Glaciers are formed by the condensation of water vapor.

What is the process of glacial erosion?

• Oxidation, reduction, and hydrolysis

• Plucking, abrasion, and freeze-thaw weathering

• Deposition, compaction, and cementation

• Melting, sublimation, and evaporation

Explain the concept of glacial deposition.

• Glacial deposition is the process where glaciers deposit sediments they have eroded and transported, forming landforms like moraines, drumlins, and eskers.

• Glacial deposition involves the formation of coral reefs by glaciers

• Glacial deposition refers to the movement of sand dunes by glaciers

• Glacial deposition is the process of volcanic ash accumulation

What factors contribute to glacial retreat?

• Global warming, increased temperatures, changes in precipitation patterns, and human activities.

• Volcanic eruptions

• Deforestation

• Decreased temperatures

Define plucking in the context of glaciers.

• The process where meltwater at the base of a glacier freezes onto rocks, and as the glacier moves, it plucks these rocks from the bedrock, carrying them along with the glacier.

• The process where glaciers melt due to high temperatures

• The process where glaciers expand rapidly

• The process where glaciers are artificially created by humans

Describe how abrasion occurs in glacial environments.

• Abrasion in glacial environments is caused by chemical weathering

• Abrasion in glacial environments is a result of volcanic activity

• Abrasion in glacial environments is the process where rocks and sediments carried by the glacier scrape against the underlying bedrock, causing erosion.

• Abrasion in glacial environments is due to wind erosion

What is meant by bulldozing in relation to glaciers?

• Glacier forming a new path through a forest

• Glacier pushing and moving debris, rocks, and sediment

• Glacier creating a new lake by blocking a river

• Glacier melting due to high temperatures

Explain the role of freeze-thaw in glacial processes.

• Freeze-thaw in glacial processes causes rocks to grow in size due to expansion.

• Freeze-thaw in glacial processes has no impact on the movement of glaciers.

• Freeze-thaw in glacial processes only occurs during the summer months.

• Freeze-thaw in glacial processes helps break down rocks into smaller sediments that can be transported by glaciers.

How do glaciers shape the landscape through erosion?

• Plucking, abrasion, and freeze-thaw weathering are the main processes through which glaciers shape the landscape.

• Melting, deposition, and sublimation

• Chemical weathering, sedimentation, and compaction

• Volcanic eruptions, earthquakes, and tsunamis

Discuss the impact of glaciers on the environment during their retreat.

• Glaciers have a positive impact on local ecosystems during their retreat

• Glaciers contribute to reducing sea levels during their retreat

• Glaciers impact the environment during their retreat by contributing to rising sea levels, altering freshwater availability, impacting local ecosystems, and releasing stored carbon and pollutants.

• Glaciers have no impact on the environment during their retreat