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Question 1 of 5
1. Question
2 points
With reference to Karst topography, consider the following statements:
It is mainly produced by the action of groundwater.
Karst topography has erosional landforms only.
Which of the Statements given above is/are correct?
Correct
Ans: A
Exp:
Statement 1 is correct: Karst topography, often referred to simply as “karst,” is a distinctive landscape that results from the dissolution of soluble rocks, primarily limestone, gypsum, and dolomite. It is characterised by various unique surface features, including sinkholes, caves, disappearing streams, underground drainage systems, and limestone pavements. Any limestone or dolomitic region showing typical landforms produced by the action of groundwater through the processes of solution and deposition is called Karst topography.
Statement 2 is incorrect: In karst topography, both erosional and depositional landforms are active in the formation of landforms like Pools, Sinkholes, lapies, limestone pavements; and stalactites, stalagmites, and pillars, respectively.
Statement 1 is correct: Karst topography, often referred to simply as “karst,” is a distinctive landscape that results from the dissolution of soluble rocks, primarily limestone, gypsum, and dolomite. It is characterised by various unique surface features, including sinkholes, caves, disappearing streams, underground drainage systems, and limestone pavements. Any limestone or dolomitic region showing typical landforms produced by the action of groundwater through the processes of solution and deposition is called Karst topography.
Statement 2 is incorrect: In karst topography, both erosional and depositional landforms are active in the formation of landforms like Pools, Sinkholes, lapies, limestone pavements; and stalactites, stalagmites, and pillars, respectively.
In the context of physical geography, ‘Cirque, Arete, Truncated Spurs, and Moraine’ are the landforms associated with :
Correct
Ans: D
Exp: “Cirque, Arete, Spurs, and Moraine” are landforms associated with glacial landscapes. The movement of glaciers is slow, unlike water flow. Glaciers move basically because of the force of gravity.
Cirques are the most common landforms in glaciated mountains and are found at the heads of glacial valleys. A lake of water can be seen quite often within the cirques after the glacier disappears. Such lakes are called cirque or tarn lakes
Arete is a narrow, sharp ridge that separates two cirques, or glacial valleys. It forms when two glaciers erode parallel valleys on opposite sides of a mountain or ridge. As the glaciers erode the rock, they leave behind a sharp crest that can be quite dramatic and steep.
Truncated Spurs are elongated ridges that extend outward from the sides of a glacial valley. They are formed when the glacier erodes the sides of the valley, leaving behind triangular-shaped landforms that jut out into the valley. The faces of divides or spurs of such hanging valleys opening into main glacial valleys are quite often truncated to give them an appearance like triangular facets
Moraines are long ridges of glacial till. Terminal moraines are long ridges of debris deposited at the end (toe) of the glaciers. Lateral moraines form along the sides, parallel to the glacial valleys.
Exp: “Cirque, Arete, Spurs, and Moraine” are landforms associated with glacial landscapes. The movement of glaciers is slow, unlike water flow. Glaciers move basically because of the force of gravity.
Cirques are the most common landforms in glaciated mountains and are found at the heads of glacial valleys. A lake of water can be seen quite often within the cirques after the glacier disappears. Such lakes are called cirque or tarn lakes
Arete is a narrow, sharp ridge that separates two cirques, or glacial valleys. It forms when two glaciers erode parallel valleys on opposite sides of a mountain or ridge. As the glaciers erode the rock, they leave behind a sharp crest that can be quite dramatic and steep.
Truncated Spurs are elongated ridges that extend outward from the sides of a glacial valley. They are formed when the glacier erodes the sides of the valley, leaving behind triangular-shaped landforms that jut out into the valley. The faces of divides or spurs of such hanging valleys opening into main glacial valleys are quite often truncated to give them an appearance like triangular facets
Moraines are long ridges of glacial till. Terminal moraines are long ridges of debris deposited at the end (toe) of the glaciers. Lateral moraines form along the sides, parallel to the glacial valleys.
With reference to coastal landforms, consider the following statement?
High rocky coasts are smooth with lagoons and tidal creeks, where depositional features dominate.
Low sedimentary coasts have highly irregular coastlines with extensions of water into land where erosional features dominate.
The west coast of India is a high, rocky, retreating coast, and the east coast of India is a low, sedimentary coast.
How many of the statements given above are correct?
Correct
Ans: A
Exp:
Statement 1 is incorrect: Along the high, rocky coasts, the rivers appear to have been drowned by a highly irregular coastline. The coastline appears highly indented, with an extension of water into the land where glacial valleys (fjords) are present. The hillsides drop off sharply into the water. Shores do not show any depositional landforms initially. Erosional features dominate
Statement 2 is incorrect: Along low sedimentary coasts, the rivers appear to extend their length by building coastal plains and deltas. The coastline appears smooth, with occasional incursions of water in the form of lagoons and tidal creeks. The land slopes gently into the water. Marshes and swamps may abound along the coast. Depositional features dominate
Statement 3 is correct:The west coast of our country is a high, rocky, retreating coast, and Erosional forms dominate the west coast. The east coast of India is a low sedimentary coast, and Depositional forms dominate on the east coast.
Statement 1 is incorrect: Along the high, rocky coasts, the rivers appear to have been drowned by a highly irregular coastline. The coastline appears highly indented, with an extension of water into the land where glacial valleys (fjords) are present. The hillsides drop off sharply into the water. Shores do not show any depositional landforms initially. Erosional features dominate
Statement 2 is incorrect: Along low sedimentary coasts, the rivers appear to extend their length by building coastal plains and deltas. The coastline appears smooth, with occasional incursions of water in the form of lagoons and tidal creeks. The land slopes gently into the water. Marshes and swamps may abound along the coast. Depositional features dominate
Statement 3 is correct:The west coast of our country is a high, rocky, retreating coast, and Erosional forms dominate the west coast. The east coast of India is a low sedimentary coast, and Depositional forms dominate on the east coast.
Which of the following is/are characteristic of the young stage of river development ?
Well-integrated flow with numerous tributaries and well-developed floodplains.
Waterfalls and rapids may exist in the region where hard rocks were found.
Rivers flowing in the Himalayan region play a significant role in shaping the landscape in that region.
Select the correct answer using the code given below.
Correct
Ans: B
Exp:
Statement 1 is incorrect: Well-integrated flow with numerous tributaries and well developed floodplains are the features of the OLD stage of the river.
Statement 2 is correct: Waterfalls and rapids are the main features of rivers in their youthful stage where local hard rock bodies are exposed.
Statement 3 is correct: The Himalayan region’s young rivers are often dynamic and play a significant role in shaping the landscape. They erode and transport vast amounts of sediment, creating impressive gorges, canyons, and valleys as they flow through the rugged terrain.
Statement 1 is incorrect: Well-integrated flow with numerous tributaries and well developed floodplains are the features of the OLD stage of the river.
Statement 2 is correct: Waterfalls and rapids are the main features of rivers in their youthful stage where local hard rock bodies are exposed.
Statement 3 is correct: The Himalayan region’s young rivers are often dynamic and play a significant role in shaping the landscape. They erode and transport vast amounts of sediment, creating impressive gorges, canyons, and valleys as they flow through the rugged terrain.
‘Drumlins, outwash plains, and eskers’ are the landforms associated with which of the following?
Correct
Ans : D
Exp: Glaciers or moving ice rivers have various depositional landforms. Esker, outwash plains and drumlins are a few of them.
Outwash Plains: The plains at the foot of the glacial mountains or beyond the limits of continental ice sheets are covered with glacio-fluvial deposits in the form of broad flat alluvial fans, which may join to form outwash plains of gravel, silt, sand and clay.
Drumlins: They are smooth oval-shaped ridge-like features composed mainly of glacial till with some masses of gravel and sand. The long axes of drumlins are parallel to the direction of ice movement. The drumlins form due to the dumping of rock debris beneath heavily loaded ice through fissures in the glacier. The stoss end gets blunted due to pushing by moving ice. Drumlins give an indication of the direction of glacier movement.
Eskers : They 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.
Reference: NCERT class 11 , Chapter 6
Incorrect
Ans : D
Exp: Glaciers or moving ice rivers have various depositional landforms. Esker, outwash plains and drumlins are a few of them.
Outwash Plains: The plains at the foot of the glacial mountains or beyond the limits of continental ice sheets are covered with glacio-fluvial deposits in the form of broad flat alluvial fans, which may join to form outwash plains of gravel, silt, sand and clay.
Drumlins: They are smooth oval-shaped ridge-like features composed mainly of glacial till with some masses of gravel and sand. The long axes of drumlins are parallel to the direction of ice movement. The drumlins form due to the dumping of rock debris beneath heavily loaded ice through fissures in the glacier. The stoss end gets blunted due to pushing by moving ice. Drumlins give an indication of the direction of glacier movement.
Eskers : They 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.
Comprehensive coverage with a concise format Integration of PYQ within the booklet Designed as per recent trends of Prelims questions हिंदी में भी उपलब्ध
Quick Revise Now ! UDAAN PRELIMS WALLAH
Comprehensive coverage with a concise format Integration of PYQ within the booklet Designed as per recent trends of Prelims questions हिंदी में भी उपलब्ध
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