Natural Resources Test

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Natural Resources Test - 41

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Weekly Quiz Competition

Question 1
1 / -0

Refer the given biogeochemical cycle and select the correct option regarding it.

A
Z is carbon dioxide, X is photosynthesis and W is acid rain.

B
Z is nitrogen, Y is combustion and W is acid rain.

C
Z is carbon dioxide by respiration, X is photosynthesis and W is global warming.

D
Z is nitrogen, X is oxygen.

Solution

The given biogeochemical cycle is carbon cycle which maintains the percentage of oxygen and carbon dioxide. Z is the carbon dioxide which is released by the respiration. X is photosynthesis which helps in fixation of the released carbon dioxide due to respiration. W is referred as global warming which involves increase in temperature of earth due to excessive increase in carbon dioxide, methane, CFC level as a result of human activities like deforestation.
Question 2
1 / -0

In carbon cycle, the process responsible for bringing carbon into its living part is

A
Photosynthesis

B
Cellular respiration

C
Combustion

D
Decomposition

E
Fixation

Solution

Photosynthesis is the process of synthesis of organic compounds in the presence of sunlight using carbon dioxide and water thereby bringing the atmospheric carbon into living organisms. Cellular respiration includes oxidation of these organic compounds to release the stored energy. Combustion is burning of fossil fuel in the presence of oxygen while decomposition is degradation of complex compounds into simpler ones. Conversion of nonusable form of any element (carbon , nitrogen etc) into biologically useful form is called as fixation. Since photosynthesis incorporate carbon into living organisms.
Therefore, the correct answer is option A.
Question 3
1 / -0

Soil erosion by wind brings about a serious damage in soil by changing the__________.

A
Soil permeability

B
Soil structure

C
Soil texture

D
Soil plasticity
Solution
- Surface texture is the best key to wind erosion protection. Very fine soil particles are carried high into the air by the wind and transported to great distances (suspension).
- Fine-to-medium-sized soil particles are lifted to a short distance by the air and are dropped back to the soil surface, damaging crops and dislodging more soil (saltation).
- Large-sized soil particles that are too large to be lifted off the ground are dislodged by the wind and roll along the soil surface (surface creep). The abrasion that results from wind-blown particles breaks down stable surface aggregates and further increases the soil erodibility.
So, the correct answer is option C.
Question 4
1 / -0

State which of the following statements is correct and incorrect?
(A) Decomposition of the organic nitrogen of dead plants and animals to ammonia is called ammonification.
(B) Some of this ammonia is converted into nitrate by soil bacteria and the rest all volatilises and returns to the atmosphere.

A
Both A and B are correct.

B
A is correct and B is incorrect.

C
A is incorrect and B is correct.

D
Both A and B are incorrect.

Solution

Once an animal or plant dies, other bacteria in the soil convert the various compounds of nitrogen back into ammonia by the process of ammonification, which is further converted into nitrates ($$NO_3$$) and nitrites ($$NO_2$$). The special type of (nitrogen-fixing) bacteria converts nitrates and nitrites into elemental nitrogen ($$N_2$$) and not nitrate.
Therefore, A is correct and B is incorrect.
Question 5
1 / -0

Aerosols having carbon and fluorine compounds are chiefly released by _______.

A
Refineries

B
Automobiles

C
Industries

D
Jets
Solution
- The propellants used for jet engine release the halogenated paraffin compounds called fluorocarbons and chlorofluorocarbons.
- Both of these compounds are the potent ozone-depleting substances. Refineries, automobiles and industries release the oxides of carbon, sulphur and nitrogen.
Hence, the correct answer is 'Jets'.
Question 6
1 / -0

A simplified model of the carbon cycle is depicted.
X, Y and Z in the figure could represent.

A
X: rice plants, Y: locusts and Z: bacteria

B
X: goats, Y: grass and Z: fungi

C
X: saprophytic bacteria, Y: horses and Z: shrubs

D
X: cows, Y: saprophytic fungi and Z: bacteria

Solution

In the given diagram, Y represents the primary producer, X represents the primary consumers and Z represents fungi. X (goats) obtain energy in the form of carbon from the Y (grass). Z (Fungi) mineralize organic carbon present in in litter of plants and goats and obtain energy. Fossil fuel is then formed from decomposition of dead organisms. Combustion of fossil fuel will release CO$$_2$$ in the atmosphere. This atmospheric CO$$_2$$ is released also from goats and grass during respiration.
Thus, the correct answer is option B.
Question 7
1 / -0

Arrange the following in the descending order of their role in soil erosion
(I) Wind erosion
(ii) Chemical degradation
(iii) Physical degradation
(iv) Water erosion

A
iv $$\rightarrow$$ i $$\to$$ ii $$\to$$ iii

B
iv $$\to$$ ii $$\to$$ iii $$\to$$ i

C
i $$\to$$ ii $$\to$$ iii $$\to$$ iv

D
iv $$\to$$ iii $$\to$$ ii $$\to$$ i

Solution

Water erosion is when the flowing water carries away the soil with it.This amounts for the largest amount of soil erosion. Wind erosion is when the blowing wind carries the soil with it. physical degradation is a gradual process of many steps beginning from structural deterioration and ending in the differential loss of finer particles through erosion. Physical degradation is a gradual process in which the soil is broken down into finer particles. Chemical degradation mainly consists of soil pollution and acidification. Thus the correct answer is option A.
Question 8
1 / -0

Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.
(i) North-East India receives very little rain throughout the year, so we can say that climate in North-East India is hot and dry.
(ii) Thick layer of subcutaneous fat, thick skin and a dense feather cover in polar birds like penguins protect them from severe cold weather.
(iii) Polar animals need to conserve water due to water scarcity.
(iv) As we move higher up from sea level, temperature decreases.

A
(i)F (ii)F (iii)T (iv)T

B
(i)F (ii)T (iii)F (iv)T

C
(i)F (ii)F (iii)T (iv)F

D
(i)T (ii)T (iii)F (iv)T
Solution
North-East India receives rain for the major part of the year. Therefore, the climate of the North-East is wet.
Polar animals do not need to conserve water in their bodies as they are living in a cold environment.
Yes, a thick layer of subcutaneous fat, thick skin, and a dense feather cover in polar birds like penguins protect them from severe cold weather.
As we move higher from sea level, the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands), and the temperature decreases.
So the correct answer is option B.
Question 9
1 / -0

In some big cities of India pollution by sulphurdioxide($${SO}_{2}$$) and carbonmonoxide ($$CO$$) was increased by $$60$$%. From following what could be one of the reason

A
Decreasing the number of vehicles moving on the road

B
Cutting trees to make wider roads

C
Change of fuels in vehicles

D
Increase in number of the people who started using cars

Solution

Sulfur dioxide and Carbon monoxide (CO) are gaseous air pollutant released by the incomplete combustion of carbon-containing fuels such as diesel. Increase in the number of vehicles will, therefore, lead to an increase in the level of such pollutants. So, the correct option is 'Increase in the number of people who started using cars'.
Question 10
1 / -0

Ingredients of atmosphere present in minute quantities but essential for maintaining life on earth are

A
Ozone and oxygen

B
Ozone and CO$$_2$$

C
Carbon dioxide and water

D
Carbon dioxide, ozone and water vapours

Solution

Life is not possible without a stable atmosphere containing the right chemical ingredients for living organisms: hydrogen, oxygen, nitrogen, and carbon. These ingredients must be balanced. Therefore we need carbon dioxide, ozone as well as water vapours. These are present in minute quantities but are essential for life. So the correct answer is ' Carbon dioxide, ozone and water vapours'.

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Re-Attempt Weekly Quiz Competition

Natural Resources Test - 41

Result

Natural Resources Test - 41

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SHARING IS CARING

Question 1

Z is carbon dioxide, X is photosynthesis and W is acid rain.

Z is nitrogen, Y is combustion and W is acid rain.

Z is carbon dioxide by respiration, X is photosynthesis and W is global warming.

Z is nitrogen, X is oxygen.

Solution

Question 2

Photosynthesis

Cellular respiration

Combustion

Decomposition

Fixation

Solution

Question 3

Soil permeability

Soil structure

Soil texture

Soil plasticity

Solution

Question 4

Both A and B are correct.

A is correct and B is incorrect.

A is incorrect and B is correct.

Both A and B are incorrect.

Solution

Question 5

Refineries

Automobiles

Industries

Jets

Solution

Question 6

X: rice plants, Y: locusts and Z: bacteria

X: goats, Y: grass and Z: fungi

X: saprophytic bacteria, Y: horses and Z: shrubs

X: cows, Y: saprophytic fungi and Z: bacteria

Solution

Question 7

iv $$\rightarrow$$ i $$\to$$ ii $$\to$$ iii

iv $$\to$$ ii $$\to$$ iii $$\to$$ i

i $$\to$$ ii $$\to$$ iii $$\to$$ iv

iv $$\to$$ iii $$\to$$ ii $$\to$$ i

Solution

Question 8

(i)F (ii)F (iii)T (iv)T

(i)F (ii)T (iii)F (iv)T

(i)F (ii)F (iii)T (iv)F

(i)T (ii)T (iii)F (iv)T

Solution

Question 9

Decreasing the number of vehicles moving on the road

Cutting trees to make wider roads

Change of fuels in vehicles

Increase in number of the people who started using cars

Solution

Question 10

Ozone and oxygen

Ozone and CO$$_2$$

Carbon dioxide and water

Carbon dioxide, ozone and water vapours

Solution

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