Static Quiz 12 April 2022
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Static Quiz 12 April 2022 for UPSC Prelims
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- Question 1 of 5
1. Question
Which of the following are the Glacial Erosional Landforms?
1. Hanging Valley
2. Cirques
3. EskersCorrectAns;- a) Only 1 and 2
Explanation;-
• The 3rd is the depositional landforms of Glacier not erosional.
• A hanging valley is a tributary valley that is higher than the main valley.
• They are most commonly associated with U-shaped valleys when a tributary glacier flows into a glacier of larger volume.
• A cirque glacier is formed in a cirque, a bowl-shaped depression on the side of or near mountains. Snow and ice accumulation in corries often occurs as the result of avalanching from higher surrounding slopes. If a cirque glacier advances far enough, it may become a valley glacier.
• Eskers are ridges made of sands and gravels, deposited by glacial meltwater flowing through tunnels within and underneath glaciers, or through meltwater channels on top of glaciers. Over time, the channel or tunnel gets filled up with sediments.
IncorrectAns;- a) Only 1 and 2
Explanation;-
• The 3rd is the depositional landforms of Glacier not erosional.
• A hanging valley is a tributary valley that is higher than the main valley.
• They are most commonly associated with U-shaped valleys when a tributary glacier flows into a glacier of larger volume.• A cirque glacier is formed in a cirque, a bowl-shaped depression on the side of or near mountains. Snow and ice accumulation in corries often occurs as the result of avalanching from higher surrounding slopes. If a cirque glacier advances far enough, it may become a valley glacier.
• Eskers are ridges made of sands and gravels, deposited by glacial meltwater flowing through tunnels within and underneath glaciers, or through meltwater channels on top of glaciers. Over time, the channel or tunnel gets filled up with sediments.
- Question 2 of 5
2. Question
Which of the following are the Glacial Depositional Landforms?
1. Drumlin Filed
2. Cirques
3. AreteCorrectAns;- a) Only 1
Explanation;-
• The 2nd and 3rd are Erosional Features of Glacier.• Drumlins are elongated, teardrop-shaped hills of rock, sand, and gravel that formed under moving glacier ice. They can be up to 2 kilometers (1.25 miles) long.
• Erosion under a glacier in the immediate vicinity of a drumlin can be on the order of a meter’s depth of sediment per year, depending heavily on the shear stress acting on the ground below the glacier from the weight of the glacier itself, with the eroded sediment forming a drumlin as it is repositioned and deposited.
• An arête is a thin, crest of rock left after two adjacent glaciers have worn a steep ridge into the rock. A horn results when glaciers erode three or more arêtes, usually forming a sharp-edged peak. Cirques are concave, circular basins carved by the base of a glacier as it erodes the landscape.
IncorrectAns;- a) Only 1
Explanation;-
• The 2nd and 3rd are Erosional Features of Glacier.• Drumlins are elongated, teardrop-shaped hills of rock, sand, and gravel that formed under moving glacier ice. They can be up to 2 kilometers (1.25 miles) long.
• Erosion under a glacier in the immediate vicinity of a drumlin can be on the order of a meter’s depth of sediment per year, depending heavily on the shear stress acting on the ground below the glacier from the weight of the glacier itself, with the eroded sediment forming a drumlin as it is repositioned and deposited.• An arête is a thin, crest of rock left after two adjacent glaciers have worn a steep ridge into the rock. A horn results when glaciers erode three or more arêtes, usually forming a sharp-edged peak. Cirques are concave, circular basins carved by the base of a glacier as it erodes the landscape.
- Question 3 of 5
3. Question
On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion
Correct
Incorrect - Question 4 of 5
4. Question
Which of the following statements are correct regarding Glacial Cycle of Erosion?
1. In Youth stage is marked by the inward cutting activity of ice in a cirque.
2. In Maturity Hanging valleys start emerging.
3. Emergence of a ‘U’-shaped valley marks the beginning of old age.CorrectAns;- d) All of the above
Explanation;-
• All the statements are correct.About Glacial Cycle of Erosion
• Youth
• The stage is marked by the inward cutting activity of ice in a cirque.
• Aretes and horns are emerging. The hanging valleys are not prominent at this stage.
• Maturity
• Hanging valleys start emerging. The opposite cirques come closer and the glacial trough acquires a stepped profile which is regular and graded.
• Old Age
• Emergence of a ‘U’-shaped valley marks the beginning of old age.
• An outwash plain with features such as eskers, kame terraces, drumlins, kettle holes etc. is a prominent development.IncorrectAns;- d) All of the above
Explanation;-
• All the statements are correct.About Glacial Cycle of Erosion
• Youth
• The stage is marked by the inward cutting activity of ice in a cirque.
• Aretes and horns are emerging. The hanging valleys are not prominent at this stage.
• Maturity
• Hanging valleys start emerging. The opposite cirques come closer and the glacial trough acquires a stepped profile which is regular and graded.
• Old Age
• Emergence of a ‘U’-shaped valley marks the beginning of old age.
• An outwash plain with features such as eskers, kame terraces, drumlins, kettle holes etc. is a prominent development. - Question 5 of 5
5. Question
Which of the following regarding D-Fjord are correct?
1. Steep-sided narrow entrance-like feature at the coast where the stream meets the coast.
2. Fjords are common in Norway, Greenland and New Zealand.CorrectAns;- c) Both 1 and 2
Explanation;-
• Both the statements are correct.• A fjord is a long, deep, narrow body of water that reaches far inland. Fjords are often set in a U-shaped valley with steep walls of rock on either side. Fjords are found mainly in Norway, Chile, New Zealand, Canada, Greenland, and the U.S. state of Alaska.
• A true fjord is formed when a glacier cuts a U-shaped valley by ice segregation and abrasion of the surrounding bedrock.
• Glacial melting is accompanied by the rebounding of Earth’s crust as the ice load and eroded sediment is removed (also called isostasy or glacial rebound).
• Glacial erosion produces U-shaped valleys, and fjords are characteristically so shaped.
• This rise can cause some fjords to have very strong currents or even saltwater rapids. Another dangerous feature found near some fjords is the presence of thousands of small, rocky island blocks. These areas are called skerries and they can be treacherous for ships to navigate.
IncorrectAns;- c) Both 1 and 2
Explanation;-
• Both the statements are correct.• A fjord is a long, deep, narrow body of water that reaches far inland. Fjords are often set in a U-shaped valley with steep walls of rock on either side. Fjords are found mainly in Norway, Chile, New Zealand, Canada, Greenland, and the U.S. state of Alaska.
• A true fjord is formed when a glacier cuts a U-shaped valley by ice segregation and abrasion of the surrounding bedrock.
• Glacial melting is accompanied by the rebounding of Earth’s crust as the ice load and eroded sediment is removed (also called isostasy or glacial rebound).
• Glacial erosion produces U-shaped valleys, and fjords are characteristically so shaped.
• This rise can cause some fjords to have very strong currents or even saltwater rapids. Another dangerous feature found near some fjords is the presence of thousands of small, rocky island blocks. These areas are called skerries and they can be treacherous for ships to navigate.
