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Puucho STATIC QUIZ 2020 – 21
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Question 1 of 5
Consider the following statements regarding Red and Yellow Soil.
- Red soil develops on crystalline igneous rocks in areas of low rainfall.
- They are fertile when fine-grained and are poor in fertility when they are coarse-grained.
- They are rich in nitrogen, phosphorous and humus.
Which of the above statements is/are correct?
CorrectSolution: a)
Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern part of the Deccan Plateau. Along the piedmont zone of the Western Ghat, long stretch of area is occupied by red loamy soil. Yellow and red soils are also found in parts of Odisha and Chhattisgarh and in the southern parts of the middle Ganga plain. The soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks. It looks yellow when it occurs in a hydrated form. The fine-grained red and yellow soils are normally fertile, whereas coarse-grained soils found in dry upland areas are poor in fertility. They are generally poor in nitrogen, phosphorous and humus.
IncorrectSolution: a)
Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern part of the Deccan Plateau. Along the piedmont zone of the Western Ghat, long stretch of area is occupied by red loamy soil. Yellow and red soils are also found in parts of Odisha and Chhattisgarh and in the southern parts of the middle Ganga plain. The soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks. It looks yellow when it occurs in a hydrated form. The fine-grained red and yellow soils are normally fertile, whereas coarse-grained soils found in dry upland areas are poor in fertility. They are generally poor in nitrogen, phosphorous and humus.
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Question 2 of 5
Consider the following statements.
- Block and Granular Disintegration type of weathering is carried out in desert regions.
- Desert regions experience a large diurnal range of temperature.
- Rocks having vertical joints are more susceptible to block disintegration type of weathering.
Which of the above statements is/are correct?
CorrectSolution: d)
- Block and Granular Disintegration type of weathering is carried out in deserts by rapid changes of temperature, or in mountains through frost action.
- Desert regions experience a large diurnal range of temperature due to direct heating by the sun during the day and rapid radiation at night. The rocks successively expand and contract.
- The repeated expansion and contraction of the rocks tends to enlarge joints and large rock masses ultimately break into angular blocks.
- This process is called block disintegration. Rocks having vertical joints are more susceptible to this form of weathering. The rocks having curvilinear joints get weathered.
- If water seeps in the cracks of the rocks, it exerts a further pressure from inwards resulting in cracking of the rock.
IncorrectSolution: d)
- Block and Granular Disintegration type of weathering is carried out in deserts by rapid changes of temperature, or in mountains through frost action.
- Desert regions experience a large diurnal range of temperature due to direct heating by the sun during the day and rapid radiation at night. The rocks successively expand and contract.
- The repeated expansion and contraction of the rocks tends to enlarge joints and large rock masses ultimately break into angular blocks.
- This process is called block disintegration. Rocks having vertical joints are more susceptible to this form of weathering. The rocks having curvilinear joints get weathered.
- If water seeps in the cracks of the rocks, it exerts a further pressure from inwards resulting in cracking of the rock.
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Question 3 of 5
Which of the following processes does not contribute to the enrichment of minerals in rocks?
- Weathering of rocks
- Erosional and depositional action of rivers
Select the correct answer code:
CorrectSolution: d)
Enrichment of many low-grade ores occurs when the metal-bearing solutions of these valuable metals drain downward along the vein or other deposits and then are re-precipitated into concentrated, bonanza grade deposits at shallow depths.
Some of these enriched deposits are quite large, being the product of long, continued forces of weathering with the descending mineral salts acting to concentrate the metal values from a great thickness of vein matter and rocks that were once located above the current outcrop, but now have been removed by erosion.
This process of natural concentration is how this the action of weathering can produce such amazingly rich ore bodies.
IncorrectSolution: d)
Enrichment of many low-grade ores occurs when the metal-bearing solutions of these valuable metals drain downward along the vein or other deposits and then are re-precipitated into concentrated, bonanza grade deposits at shallow depths.
Some of these enriched deposits are quite large, being the product of long, continued forces of weathering with the descending mineral salts acting to concentrate the metal values from a great thickness of vein matter and rocks that were once located above the current outcrop, but now have been removed by erosion.
This process of natural concentration is how this the action of weathering can produce such amazingly rich ore bodies.
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Question 4 of 5
Delta formation will be greatly affected if
- There are frequent tides on the coast.
- The sea adjoining delta is shallow.
- There is strong current running at right angle to the river mouth
Select the correct answer code:
CorrectSolution: b)
The following conditions are favourable for the formation of delta:
- Active erosion of the river in its upper course to provide extensive gravel, sand and silt to be eventually deposited as deltas. Low erosion will hinder deltas.
- The coast should be sheltered preferably tideless, else delta will be washed away.
- The sea should be shallow adjoining the delta as the sediments will disappear in the deep waters of the sea.
Moreover, there should be no strong current running at right angle to the river mouth, as it can wash away the sediments. Any large lake in the way or river course can filter off the sediments, thus unfavourable for delta formation.
IncorrectSolution: b)
The following conditions are favourable for the formation of delta:
- Active erosion of the river in its upper course to provide extensive gravel, sand and silt to be eventually deposited as deltas. Low erosion will hinder deltas.
- The coast should be sheltered preferably tideless, else delta will be washed away.
- The sea should be shallow adjoining the delta as the sediments will disappear in the deep waters of the sea.
Moreover, there should be no strong current running at right angle to the river mouth, as it can wash away the sediments. Any large lake in the way or river course can filter off the sediments, thus unfavourable for delta formation.
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Question 5 of 5
Consider the following statements regarding Karst topography.
- Karst topography is commonly associated with carbonate rocks.
- It occurs in temperate, tropical, alpine and polar environments.
- karst systems are rarely vulnerable to ground water pollution as it acts as natural water filtration system.
Which of the above statements is/are correct?
CorrectSolution: c)
- The term karst describes a distinctive topography that indicates dissolution (also called chemical solution) of underlying soluble rocks by surface water or ground water. Although commonly associated with carbonate rocks(limestone and dolomite) other highly soluble rocks such as evaporates (gypsum and rock salt) can be sculpted into karst terrain.
- Understanding caves and karst is important because ten percent of the Earth’s surface is occupied by karst landscape and as much as a quarter of the world’s population depends upon water supplied from karst areas. Though most abundant in humid regions where carbonate rock is present, karst terrain occurs in temperate, tropical, alpine and polar environments. Karst features range in scale from microscopic (chemical precipitates) to entire drainage systems and ecosystems which cover hundreds of square miles, and broad karst plateaus.
- Although karst processes sculpt beautiful landscapes, karst systems are very vulnerable to ground water pollution due to the relatively rapid rate of water flow and the lack of a natural filtration system. This puts local drinking water supplies at risk of being contaminated.
IncorrectSolution: c)
- The term karst describes a distinctive topography that indicates dissolution (also called chemical solution) of underlying soluble rocks by surface water or ground water. Although commonly associated with carbonate rocks(limestone and dolomite) other highly soluble rocks such as evaporates (gypsum and rock salt) can be sculpted into karst terrain.
- Understanding caves and karst is important because ten percent of the Earth’s surface is occupied by karst landscape and as much as a quarter of the world’s population depends upon water supplied from karst areas. Though most abundant in humid regions where carbonate rock is present, karst terrain occurs in temperate, tropical, alpine and polar environments. Karst features range in scale from microscopic (chemical precipitates) to entire drainage systems and ecosystems which cover hundreds of square miles, and broad karst plateaus.
- Although karst processes sculpt beautiful landscapes, karst systems are very vulnerable to ground water pollution due to the relatively rapid rate of water flow and the lack of a natural filtration system. This puts local drinking water supplies at risk of being contaminated.
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