Natural Resources Test

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Natural Resources Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

CO$$_2$$ absorbs some of the ......... that radiates from the surface of Earth to space

A
Ozone

B
Heat

C
Ultraviolet light

D
Smog

Solution

Carbon dioxide is one of the green house gases that trap the heat reflected from the earth back to space. An increase in the percentage of such gases in the atmosphere would cause the average temperatures to increase world-wide and this is called the greenhouse effect. An increase in the carbon dioxide content in the atmosphere would cause more heat to be retained by the atmosphere and lead to global warming.
The correct option is B - 'Heat'.
Question 2
1 / -0

The part of earth comprising water is called an

A
Atmosphere

B
Hydrosphere

C
Lithosphere

D
None of the above

Solution

Water covers 75% of the Earth’s surface. It is also found underground. These comprise the hydrosphere.
The land forms the lithosphere while the blanket of air around the earth fprms the atmosphere.
The correct option is B.
Question 3
1 / -0

Which gas has the highest percentage in air?

A
Nitrogen

B
Oxygen

C
Carbon dioxide

D
Carbon monoxide
Question 4
1 / -0

The ozone layer in our atmosphere protects us from the bad effects of:

A
Carbon dioxide

B
CFC's

C
The sun's ultraviolet rays

D
All of the above

Solution

The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects. When the sky is clear, there is an inverse relationship between stratospheric ozone and solar UVR measured at the Earth’s surface. That is,the lower the ozone levels, the higher the solar UVR.

Hence, the correct option is $$\text{C}$$
Question 5
1 / -0

Conserving the environment means _______________.

A
not destroying natural resources

B
not lowering the quality of the environment

C
exploiting natural resources

D
preserving the condition of the nature that has been destroyed

Solution

Conservation is the act of protecting and preserving the natural resources or biodiversity from being depleted by taking proper resource management measures. This helps in minimizing the destruction of our natural resources like cutting of trees or deforestation.
Question 6
1 / -0

More soil erosion occurs where there is

A
No rainfall

B
Low rainfall

C
High rainfail

D
None of the above

Solution

Soil erosion is defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient-rich materials. Therefore, this is the layer that farmers want to protect for growing their crops and ranchers want to protect for growing grasses for their cattle to graze on.
Precipitation is the most forceful factor causing erosion.
Erosion is dependent on the amount, duration, intensity and frequency of rainfall. By the action of dashing rain drops on soil, soil granules are loosened, detached and separated into fine particles. Erosion is greater where the rainfall is not only heavy, but concentrated over short periods.
Question 7
1 / -0

Which of the following is not true about biogas?

A
It contains methane

B
Burns without smoke

C
Leaves ash behind

D
Produced by anaerobic decomposition of animal and plant waste

Solution

Biogas is produced from raw materials such as agricultural waste, manure, plant material, or food waste. It contains methane and is a clean and renewable gas that burns without any smoke. It also does not produce any ash.
Thus, the correct option is C.
Question 8
1 / -0

Soil erosion can be prevented by

A
Deforestation

B
Raising forests

C
Adding fertilizers

D
Irrigation

Solution

Soil erosion occurs due to wind, rain and run off water. It can be prevented by raising forests or afforestation, the roots of the plants holds the soil while the canopy reduces the impact of rainfall on the soil and thus prevents it from getting eroded. It also helps more rain water to seep inside the soil.
So, the correct answer is 'Raising forests'
Question 9
1 / -0

Denitrification is the _______________.

A
Reduction of NO$$_2$$ to ammonia by bacteria in the soil

B
Conversion of ammonia to amino acids

C
Conversion of ammonia and nitrates to gaseous nitrogen

D
Oxidation of ammonia to nitrate

Solution

Denitrification is the process of conversion of nitrates and ammonia into nitrogen gas, which is returned back to the atmosphere. This is caused by bacteria and they obtain their energy by this process. A small amount is converted to usable forms by lightning in a process called atmospheric nitrogen fixation.
Therefore, the correct answer is option C.
Question 10
1 / -0

Which of the following factor does not help in the formation of soil?

A
Wind and water

B
Decomposed plants and animals

C
Rocks and temperature

D
Water accumulation

Solution

The surface layer of the earth's crust is called soil. It forms by the process of weathering and erosion. It takes a long time to form the soil. There are several factors that affect the process of soil formation. These are climate, topography, parent material, organic material and time span. Rainfall influence the rate of weathering and humus formation. Parent rocks determine the texture, colour, chemical properties, mineral content and quality. Topography i.e. slope and altitude decide the accumulation of soil. Flora, fauna and microbes affect the rate of humus formation. Time span determines the thickness of soil layer. Water accumulation does not help in the formation of soil.
So, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Natural Resources Test - 24

Result

Natural Resources Test - 24

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SHARING IS CARING

Question 1

Ozone

Heat

Ultraviolet light

Smog

Solution

Question 2

Atmosphere

Hydrosphere

Lithosphere

None of the above

Solution

Question 3

Nitrogen

Oxygen

Carbon dioxide

Carbon monoxide

Question 4

Carbon dioxide

CFC's

The sun's ultraviolet rays

All of the above

Solution

Question 5

not destroying natural resources

not lowering the quality of the environment

exploiting natural resources

preserving the condition of the nature that has been destroyed

Solution

Question 6

No rainfall

Low rainfall

High rainfail

None of the above

Solution

Question 7

It contains methane

Burns without smoke

Leaves ash behind

Produced by anaerobic decomposition of animal and plant waste

Solution

Question 8

Deforestation

Raising forests

Adding fertilizers

Irrigation

Solution

Question 9

Reduction of NO$$_2$$ to ammonia by bacteria in the soil

Conversion of ammonia to amino acids

Conversion of ammonia and nitrates to gaseous nitrogen

Oxidation of ammonia to nitrate

Solution

Question 10

Wind and water

Decomposed plants and animals

Rocks and temperature

Water accumulation

Solution

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