Class 11 Geography Important Chapter 12 Glaciers

Class 11 Geography Important Chapter 12 Glaciers Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Geography Important Solutions and select need one. AHSEC Class 11 Elective Geography Additional Notes English Medium Download PDF. HS 1st Year Finance Important Solutions in English.

Class 11 Geography Important Chapter 12 Glaciers

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Glaciers

Chapter: 12

THIRD UNIT : GEOMORPHIC FEATURES AND THEIR EVOLUTIONARY PROCESS

IMPORTANT QUESTION AND ANSWER

Answer The Following Questions:

1. What is a Cirque?

Ans: A bowl-shaped hollow formed on the mountain slope at the source of a glacier is called a Cirque or Cwm.

2. What is a Horn?

Ans: A Horn is a pyramid-shaped peak formed when several glaciers erode a mountain from different sides.

3. What is Glacial Till?

Ans: The mixture of rock fragments, sand, and soil carried and deposited by a glacier is called Glacial Till.

4. What are the depressions on the surface of a Kame called?

Ans: The depressions on the surface of a Kame are called Kettles.

5. What is a Kettle?

Ans: Small hollows or depressions found on a Kame surface are called Kettles.

6. What is the approximate length and height of a Drumlin?

Ans: A Drumlin may be up to 1 kilometre long and 30 metres high.

7. What is meant by Glacial Transportation?

Ans: The process by which glaciers carry materials such as rocks and debris is called Glacial Transportation.

8. How fast does a glacier move?

Ans: The movement of a glacier is very slow — usually a few centimetres to a few metres per day.

9. What are the three main erosional activities of glaciers?

Ans: The three main erosional activities of glaciers are plucking, abrasion, and deposition.

10. In which regions are glaciers more active?

Ans: Glaciers are more active in high-latitude and high-mountain regions.

Long Question & Answer:

1. What is a Glacier? Describe its formation and role in landform development.

Ans: A glacier is a mass of snow accumulated over years that turns into ice under pressure and moves slowly down a slope due to gravity.

It acts like a river of ice, flowing slowly down mountainous regions.For a glacier to form, snowfall must exceed melting and evaporation for several years. The accumulated snow compresses into solid ice layers that begin to move downward under gravity. Glaciers shape landforms through erosion, transportation, and deposition — creating valleys, horns, cirques, and moraines.

2. Describe the erosional landforms created by glaciers.

Ans: (i) Cirque (Cwm): A bowl-shaped hollow at a glacier’s origin. When filled with melted water, it forms a lake called a Tarn.

(ii) Arete: A sharp ridge formed between two cirques.

(iii) Horn: A pyramid-shaped peak formed when several glaciers erode from all sides.

(iv) U-Shaped Valley: A deep, smooth, and broad valley with a flat floor and steep sides formed by glacial erosion.

(v) Hanging Valley: Formed by tributary glaciers at a higher level than the main valley; often leads to waterfalls.

(vi) Fiord: A glacial valley submerged by the sea, found mostly in coastal mountain regions.

3. Compare a U-Shaped Valley and a Hanging Valley.

Ans: A U-Shaped Valley is formed by the main glacier through deep erosion, producing wide, smooth valleys with a U-like cross-section. A Hanging Valley is formed by smaller tributary glaciers that erode less deeply, remaining higher than the main valley. Waterfalls often occur where hanging valleys join the main U-shaped valley. Both are results of glacial erosion but differ in size, depth, and altitude.