Forests Our Lifeline Test

Result

Forests Our Lifeline Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Find the odd one out.
Neem, Tulsi, Amla and Teak.

A
Teak

B
Neem

C
Tulsi

D
Amla

Solution

Amla, tulsi and neem are medicinal plants whereas, teak produces wood which is used for various works like making furniture, construction, etc.
Thus, the correct answer is option A.
Question 2
1 / -0

Deforestation leads to the increased percentage of which of the following components of the environment?

A
Carbon dioxide

B
Nitrogen

C
Oxygen

D
None of the above

Solution

Deforestation leads to the increased percentage of carbon dioxide components of the environment because trees provide oxygen by taking up carbon dioxide when their number reduces the carbon dioxide was unable to be converted into oxygen. That's why its components increases.
Question 3
1 / -0

Find the odd one out.

A
Teak

B
Bamboo

C
Sheesham (Rosewood)

D
Neem
Solution
- Teak, bamboo and Sheesham are used to obtain different types of wood. they are commonly used in the furniture industry for making tables, chairs, beds etc.
- Neem is a medicinal plant, which is used as a herb most of the time.
So, the correct option is option D.
Question 4
1 / -0

Study the following statements regarding food chains and select the correct ones.
(i) Removal of $$80\%$$ tigers from an area resulted in greatly increased growth of vegetation.
(ii) Removal of most of the carnivores resulted in an increased population of deers.
(iii) The length of food chains is generally limited to $$3-4$$ trophic levels due to energy loss.
(iv) The length of food chains may vary from $$2$$ to $$8$$ trophic levels.

A
(i) and (ii)

B
(ii) and (iii)

C
(i) and (iii)

D
(iii) and (iv)

Solution

If carnivores, which feed on deer are removed, then the deer population will flourish. Removal of 80% of tigers from an area will cause an increase in the population of herbivores, which would further feed on more vegetation thus, decreasing its growth. The length of the food chain is limited to 3−4 trophic levels as only 10% of energy is transferred to the next trophic level. Hence after 3−4 trophic levels, there is very little or no energy left to sustain more trophic levels.
So, the correct answer is '(ii) and (iii)'.
Question 5
1 / -0

Forests take part in

A
Control of atmospheric pollution

B
Prevention of soil erosion

C
Maintenance of natural balance

D
All the above

Solution

Forests are useful in many ways such as, controlling atmospheric pollution, prevention of soil erosion, providing shelter to wild animals, maintenance of water cycle.
So, the correct answer is 'All the above'
Question 6
1 / -0

The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.

A
Desert

B
Forest

C
Open field

D
Cricket ground

Solution

In the forest, plenty of plants and trees are grown. Because of plants and trees, in the forest moisture and nutrients are sufficient. It helps to promote the expansion of micro-organisms.
The correct answer is option (b).
Question 7
1 / -0

Identify the incorrect statement.

A
Forest prevents soil erosion.

B
Forest influences climate and water cycle.

C
Soil helps forest to regenerate.

D
Plants and animals in the forest are not dependent on one another.
Solution
- Plants provide shelter for animals and they make oxygen for the animals to live. When animals die they decompose and become natural fertilizer plants. Plants depend on animals for nutrients, pollination and seed dispersal.
- Hence Plants and animals in the forest are dependent on one another.
- Hence the given statement Plants and animals in the forest are not dependent on one another is a wrong statement.
- So, the correct answer is 'Option D'.
Question 8
1 / -0

What happens if forest disappears?

A
Climate change

B
Flood

C
Soil erosion

D
All of the above
Solution
Deforestation(disappearance of the forest) is when humans remove or clear large areas of forest lands and related ecosystems for non-forest use. These include clearing for farming purposes, ranching, and urban use. In these cases, trees are never re-planted.
Plants absorb large amounts of carbon dioxide from the atmosphere. When deforestation takes place it results in an increase in carbon dioxide concentration in the atmosphere which results in global warming. Hence results in an increase in temperature. Thus deforestation leads to climate change.
Without trees, rain runs off soil into rivers and streams i.e soil erosion, raising the water level which leads to floods. Hence deforestation results in the flood.
Hence Climate change, Flood and Soil erosion happens if forest disappears.
So, the correct answer is 'All the above'.
Question 9
1 / -0

If forest disappear

A
The amount of $${ CO }_{ 2 }$$ in air decrease

B
The amount of $${ O }_{ 2 }$$ in air will increases

C
The amount of $${ CO }_{ 2 }$$ in air increases

D
The Amount of nitrogen in air will increase
Solution
- If forest disappears or deforestation continues to exist then the amount of carbon dioxide in the atmosphere will increase.
- This is because the green plants capable of fixing atmospheric carbon dioxide into organic material such as glucose by the action of photosynthesis are no longer available.
- Thus, increasing the carbon dioxide level in the air.
So, the correct option is 'The amount of carbon dioxide in the air increases'.
Question 10
1 / -0

Which of the following serve as green lungs?

A
Green pigment of the plants

B
Forests

C
Kitchen gardens

D
Green house gases

Solution

Plants and trees work as green lungs because they are giving out oxygen and take carbon dioxide from us. Forests serve as green lungs.
Thus, the correct answer is option (b).

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Re-Attempt Weekly Quiz Competition

Forests Our Lifeline Test - 8

Result

Forests Our Lifeline Test - 8

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SHARING IS CARING

Question 1

Teak

Neem

Tulsi

Amla

Solution

Question 2

Carbon dioxide

Nitrogen

Oxygen

None of the above

Solution

Question 3

Teak

Bamboo

Sheesham (Rosewood)

Neem

Solution

Question 4

(i) and (ii)

(ii) and (iii)

(i) and (iii)

(iii) and (iv)

Solution

Question 5

Control of atmospheric pollution

Prevention of soil erosion

Maintenance of natural balance

All the above

Solution

Question 6

Desert

Forest

Open field

Cricket ground

Solution

Question 7

Forest prevents soil erosion.

Forest influences climate and water cycle.

Soil helps forest to regenerate.

Plants and animals in the forest are not dependent on one another.

Solution

Question 8

Climate change

Flood

Soil erosion

All of the above

Solution

Question 9

The amount of $${ CO }_{ 2 }$$ in air decrease

The amount of $${ O }_{ 2 }$$ in air will increases

The amount of $${ CO }_{ 2 }$$ in air increases

The Amount of nitrogen in air will increase

Solution

Question 10

Green pigment of the plants

Forests

Kitchen gardens

Green house gases

Solution

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