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Daily Quiz: December 28, 2018
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- Question 1 of 7
1. Question
1 pointsCategory: Geography & EnvironmentWith reference to the layers of the atmosphere, Consider the following statements
- Troposphere is the hottest part of the atmosphere because the heat is generated in it.
- Ozone in the stratosphere absorbs most of the ultraviolet radiation found in the Sun’s rays.
- The tropopause is the boundary in the Earth’s atmosphere between the troposphere and the stratosphere.
Which of the above statement(s) is/are correct?
Correct
Statement 1 is incorrect. Troposphere is the hottest part of the atmosphere because it is heated by the Earth’s surface. It is the nearest atmospheric layer of earth’s surface.
Statement 2 is correct. The ozone layer or ozone shield is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet (UV) radiation. The ozone layer absorbs 97 to 99 percent of the Sun’s medium-frequency ultraviolet light.
Statement 3 is correct. The tropopause is the boundary in the Earth’s atmosphere between the troposphere and the stratosphere. It is a thermodynamic gradient stratification layer, marking the end of troposphere.
Incorrect
Statement 1 is incorrect. Troposphere is the hottest part of the atmosphere because it is heated by the Earth’s surface. It is the nearest atmospheric layer of earth’s surface.
Statement 2 is correct. The ozone layer or ozone shield is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet (UV) radiation. The ozone layer absorbs 97 to 99 percent of the Sun’s medium-frequency ultraviolet light.
Statement 3 is correct. The tropopause is the boundary in the Earth’s atmosphere between the troposphere and the stratosphere. It is a thermodynamic gradient stratification layer, marking the end of troposphere.
- Question 2 of 7
2. Question
1 pointsCategory: Geography & EnvironmentWhich of the following statement(s) about mangrove forests in the Sundarbans is/are incorrect?
- Erosion of mangroves in response to climate change can pose a serious threat to the carbon sequestration potential of the mangrove forests.
- Climate change and decrease in sea levels have contributed to the phenomenon of losing land, in the mangrove forests of the Sundarbans.
Correct
Statement 1 is correct – Erosion of mangroves in response to climate change and sea level rise poses a serious threat to the carbon sequestration potential and other ecosystem services of this mangrove forest in future.
Statement 2 is incorrect. Climate change and sea level rise (and not decrease) has contributed to the phenomenon of losing land, including mangrove forests in the Sundarbans.
More Details:
There is less fresh water flow and sediment supply in the Indian part of the delta, so we have starvation of sediment and the rate of sea level rise is higher than sediment supply. Hence we are losing land, including mangrove forest. Sundarban is recognized as an UNESCO World Heritage Site.
Incorrect
Statement 1 is correct – Erosion of mangroves in response to climate change and sea level rise poses a serious threat to the carbon sequestration potential and other ecosystem services of this mangrove forest in future.
Statement 2 is incorrect. Climate change and sea level rise (and not decrease) has contributed to the phenomenon of losing land, including mangrove forests in the Sundarbans.
More Details:
There is less fresh water flow and sediment supply in the Indian part of the delta, so we have starvation of sediment and the rate of sea level rise is higher than sediment supply. Hence we are losing land, including mangrove forest. Sundarban is recognized as an UNESCO World Heritage Site.
- Question 3 of 7
3. Question
1 pointsCategory: Geography & EnvironmentWhich of the following type of soil has surface accumulation of biosphere reserves?
Correct
Peaty Soil is the right answer.
More about Peaty Soil:
Peat is a type of soil made up of waterlogged partially-decomposed plant material including sphagnum moss and other acid-loving plants, which has built up over something like 10,000 years in poorly-drained wetland habitats.
Peaty soil is dark brown or black in color, soft, easily compressed due to its high water content, and rich in organic matter.
Although peat soil tends to be heavily saturated with water, once drained, it turns into a good growing medium.
Peat contains acidic water, but growers use it to regulate soil chemistry or pH levels as well as an agent of disease control for the soil.
Incorrect
Peaty Soil is the right answer.
More about Peaty Soil:
Peat is a type of soil made up of waterlogged partially-decomposed plant material including sphagnum moss and other acid-loving plants, which has built up over something like 10,000 years in poorly-drained wetland habitats.
Peaty soil is dark brown or black in color, soft, easily compressed due to its high water content, and rich in organic matter.
Although peat soil tends to be heavily saturated with water, once drained, it turns into a good growing medium.
Peat contains acidic water, but growers use it to regulate soil chemistry or pH levels as well as an agent of disease control for the soil.
- Question 4 of 7
4. Question
1 pointsCategory: Geography & EnvironmentFor which of the following crops, the Green Revolution in India had limited impact?
Correct
Green Revolution in India had least impact on the increase in Pulse production.
Impact of Green Revolution on Cereal Production:
The key achievement of the green revolution was boost in production of two major cereals viz. Wheat and rice. But it was also a major drawback.
The revolution was mainly confined to High Yielding Varieties (HYV) cereals, mainly rice, wheat, maize and jowar.
It did not cover other coarse cereals, millets and neither had it covered pulses.
Incorrect
Green Revolution in India had least impact on the increase in Pulse production.
Impact of Green Revolution on Cereal Production:
The key achievement of the green revolution was boost in production of two major cereals viz. Wheat and rice. But it was also a major drawback.
The revolution was mainly confined to High Yielding Varieties (HYV) cereals, mainly rice, wheat, maize and jowar.
It did not cover other coarse cereals, millets and neither had it covered pulses.
- Question 5 of 7
5. Question
1 pointsCategory: Geography & EnvironmentWhich of the following is found in Karst region?
Correct
Hums are found in the Karst regions.
About Karst regions:
Karst topography is a landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum.
It is characterized by underground drainage systems with sinkholes and caves.
It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions.
Karst is a terrain with a characteristic relief and drainage arising mainly due to higher solubility of rock in natural water than is found elsewhere.
What are Hums?
These are curved relicts of limestone rocks after erosion.
Incorrect
Hums are found in the Karst regions.
About Karst regions:
Karst topography is a landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum.
It is characterized by underground drainage systems with sinkholes and caves.
It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions.
Karst is a terrain with a characteristic relief and drainage arising mainly due to higher solubility of rock in natural water than is found elsewhere.
What are Hums?
These are curved relicts of limestone rocks after erosion.
- Question 6 of 7
6. Question
1 pointsCategory: Geography & EnvironmentConsider the following statement about layers of earth:
- Lithosphere consist of crust and upper part of upper mantle, whereas asthenosphere consists of upper mantle only.
- Crust is the thinnest layer and Core is the thickest layer.
- The thinner crust are the oceanic crust is of composed of granite and the thicker crust is the continental crust composed of basalt.
Correct
THE CRUST
DEPTH: from 5–70 KM and is the outermost layer.
The thin parts are the oceanic crust, which underlies the ocean basins (5–10 km) and is composed of basalt.
The thicker crust is the continental crust composed of granite.
Major constituent element: Silica (Si) and Aluminium (Al) and thus, it is often termed as SIAL
The mean density: 3g/cm3.
THE MANTLE
Depth :2,890 km (the thickest layer of earth)
The mantle is divided into upper and lower mantle. The upper and lower mantle are separated by the transition zone.
The major constituent elements: silicon and magnesium also termed as SiMa.
The density: varies from 3.3 – 5.4g/cm3.
The lithosphere is made up the crust plus the very upper part of the mantle, whereas the asthenosphere is only upper mantle material.
THE CORE
Earth has a core, but this is really two distinct parts: the inner core and the outer core.
Major constituent: iron and some nickel, called NiFe
The denser materials exist within earth’s core.
Mean average density: between 9.5-14.5g/cm3.( densest layer of the earth )
Incorrect
THE CRUST
DEPTH: from 5–70 KM and is the outermost layer.
The thin parts are the oceanic crust, which underlies the ocean basins (5–10 km) and is composed of basalt.
The thicker crust is the continental crust composed of granite.
Major constituent element: Silica (Si) and Aluminium (Al) and thus, it is often termed as SIAL
The mean density: 3g/cm3.
THE MANTLE
Depth :2,890 km (the thickest layer of earth)
The mantle is divided into upper and lower mantle. The upper and lower mantle are separated by the transition zone.
The major constituent elements: silicon and magnesium also termed as SiMa.
The density: varies from 3.3 – 5.4g/cm3.
The lithosphere is made up the crust plus the very upper part of the mantle, whereas the asthenosphere is only upper mantle material.
THE CORE
Earth has a core, but this is really two distinct parts: the inner core and the outer core.
Major constituent: iron and some nickel, called NiFe
The denser materials exist within earth’s core.
Mean average density: between 9.5-14.5g/cm3.( densest layer of the earth )
- Question 7 of 7
7. Question
1 pointsCategory: Geography & EnvironmentWhich of the following statement(s) is/are correct about Laterite soil?
- They are rich in iron oxide and potash.
- They are generally dark grey in colour.
- Found in the areas of high temperature and low rainfall.
- Cashew nuts, tea, coffee, rubber are generally grown on this soil.
Correct
Statement 2 and 3 is incorrect because
They are generally red in colour due to presence of iron oxide and found in region of high temperature and high rainfall.
About Laterite soil:
Laterite is a soil and rock type rich in iron and aluminium, and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and long-lasting weathering of the underlying parent rock.
Incorrect
Statement 2 and 3 is incorrect because
They are generally red in colour due to presence of iron oxide and found in region of high temperature and high rainfall.
About Laterite soil:
Laterite is a soil and rock type rich in iron and aluminium, and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and long-lasting weathering of the underlying parent rock.
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