Natural Resources Test

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Natural Resources Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

If there is a fire in the forest, there will be less _________ in the environment.

A
Carbon dioxide

B
Nitrogen

C
Sunlight

D
Oxygen

Solution

Oxygen supports burning and hence, oxygen is needed for the fire, for the woods to burn. The organic plants, trees, etc. use up the oxygen present in the atmosphere, thus reducing its amount.
So, the correct answer is option D.
Question 2
1 / -0

Nitrogen cycle includes

(a) Nitrogen fixation (b) Ammonificiation (c) Nitrification (d) Denitrification

A
a, b, c, d

B
b, c, d

C
a, c, d

D
None of these
Question 3
1 / -0

The microorganisms that play an important role in maintaining the balance of nitrogen gas in the atmosphere are ________.

A
Bacteria

B
Fungi

C
Virus

D
Protozoa
Solution
- Bacteria like Rhizobium and Cyanobacteria are involved in nitrogen fixation.
- Nitrobacter, Nitrosomonas, and many other bacteria play a crucial role in maintaining the balance of nitrogen gas in the atmosphere.
Hence, bacteria is the correct answer.
Question 4
1 / -0

Choose the incorrect statement from the following.

A
Air is a good conductor of heat.

B
Air helps in transmitting sound.

C
Burning of fire takes place in presence of oxygen.

D
Ozone layer of the atmosphere protects the living organisms from harmful radiations of the sun.

Solution

Air is a bad conductor of heat and not a good conductor. Hence, the temperature on the earth is maintained for the life to exist unlike the other planets. Atmosphere prevents sudden increase in temperature during the day and slows down the escape of heat into outer space during the night.
Thus, the correct answer is option A.
Question 5
1 / -0

As we go on higher altitude, the oxygen level in the atmosphere:

A
Decreases

B
Increases

C
Remains same

D
Can't say

Solution

As we go to higher altitude, the oxygen level in the atmosphere decreases. Thus it becomes difficult for mountaineers to breathe on mountains.
Question 6
1 / -0

Identify the option which correctly explains the processes mentioned as A,B and C in the nitrogen cycle.

A
A = Nitrogen compounds are broken

B = Nitrogen is broken

C = Nitrogen compounds formed

B
A = Nitrogen converted into Nitrogenin containing compounds

B = Animals eats plants

C = Nitrogen compounds converted into Nitrogen gas

C
A = Nitrogen compounds formed

B = Animals excretes nitrogen compound

C = Nitrogen $$\rightarrow N_{2} $$ gas

D
None of the above

Solution

A = Nitrogen is converted into nitrogen compounds.
B = Animals eat plants.
C = Nitrogen compounds converted into nitrogen gas.

The atmospheric nitrogen is converted into nitrogen compounds using several methods i.e. nitrogen fixation. These nitrogen compounds all up took by plants. Animals eat plants and both the animal and plant biomass is decomposed and converted into ammonia by the process called ammonification. Nitrification is a process of the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. Denitrification is the process by which the nitrogen compounds are converted into nitrogen gas.
Question 7
1 / -0

Observe the nitrogen cycle given and answer the following question. What is the conversion of ammonia into nitrates called?

A
Nitrification

B
Ammonification

C
Dentrification

D
Nitrogen fixation
Solution
Ammonification: It is the primary process that converts reduced organic nitrogen (R–NH2) to reduced inorganic nitrogen (NH4+) through the action of microorganisms.
Nitrification: It is a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate.
Denitrification: Some bacteria convert nitrates and nitrates into elemental nitrogen.
Nitrogen fixation: The chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
So, the correct answer is option A- 'Nitrification'.
Question 8
1 / -0

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from

A
An increase in cellular respiration

B
Increased decomposition by bacteria

C
An increase in the burning of fossil fuels

D
An increase in photosynthesis

Solution

Cellular Respiration (a) and Decomposition (b) both add to carbon dioxide, but there is no evidence that these have increased over the last 50 years. Photosynthesis (d) decrease carbon dioxide. However, an increase in the burning of fossil fuels (C) has increased. For example, there are many more vehicles burning gasoline than in the past, coal is used in household and industries, diesel is used for in working of certain construction equipments etc
moreover, urbanisation and industrialization has lead to deforestation, leading to decrease in number of trees that fix carbon dioxide.
So, the correct answer is 'An increase in the burning of fossil fuels'
Question 9
1 / -0

Oxygen from the atmosphere is used up in processes, namely:

A
Combustion

B
Respiration

C
Forming oxides of nitrogen

D
All of the above
Solution
- Oxygen is one of the most important elements of the Earth's atmosphere. It is consumed by every living creature in every natural process.
- In respiration, living organisms take in oxygen to generate energy from the food that they eat.
- Any combustion reaction requires oxygen.
- Forming oxides of any element requires oxygen.
Therefore, the correct answer is option D.
Question 10
1 / -0

Oxygen is a gas produced by _____ and used by _____.

A
Plants, animals

B
Animals, plants

C
Photosynthesis, carbon dioxide

D
Carbon dioxide, photosynthesis

Solution

Photosynthesis produces oxygen as a byproduct. Plants and algae breathe out this oxygen into the atmosphere. Humans and animals then breathe in this oxygen ($$\displaystyle { O }_{ 2 }$$) for cellular respiration to release the energy from glucose. Oxygen is needed for cellular respiration, but it does not come from this process.
Thus, the correct answer is option A.

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Natural Resources Test - 29

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Natural Resources Test - 29

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SHARING IS CARING

Question 1

Carbon dioxide

Nitrogen

Sunlight

Oxygen

Solution

Question 2

a, b, c, d

b, c, d

a, c, d

None of these

Question 3

Bacteria

Fungi

Virus

Protozoa

Solution

Question 4

Air is a good conductor of heat.

Air helps in transmitting sound.

Burning of fire takes place in presence of oxygen.

Ozone layer of the atmosphere protects the living organisms from harmful radiations of the sun.

Solution

Question 5

Decreases

Increases

Remains same

Can't say

Solution

Question 6

A = Nitrogen compounds are brokenB = Nitrogen is brokenC = Nitrogen compounds formed

A = Nitrogen converted into Nitrogenin containing compoundsB = Animals eats plantsC = Nitrogen compounds converted into Nitrogen gas

A = Nitrogen compounds formedB = Animals excretes nitrogen compoundC = Nitrogen $$\rightarrow N_{2} $$ gas

None of the above

Solution

Question 7

Nitrification

Ammonification

Dentrification

Nitrogen fixation

Solution

Question 8

An increase in cellular respiration

Increased decomposition by bacteria

An increase in the burning of fossil fuels

An increase in photosynthesis

Solution

Question 9

Combustion

Respiration

Forming oxides of nitrogen

All of the above

Solution

Question 10

Plants, animals

Animals, plants

Photosynthesis, carbon dioxide

Carbon dioxide, photosynthesis

Solution

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A = Nitrogen compounds are broken

B = Nitrogen is broken

C = Nitrogen compounds formed

A = Nitrogen converted into Nitrogenin containing compounds

B = Animals eats plants

C = Nitrogen compounds converted into Nitrogen gas

A = Nitrogen compounds formed

B = Animals excretes nitrogen compound

C = Nitrogen $$\rightarrow N_{2} $$ gas