Question Bank for 4th Class General Knowledge Our Environment Environment and its Conservation

1)

Rohan is suffering from jaundice. What could be the possible reason for this?

A)

He played in polluted soil.

B)

He drank polluted water.

C)

He breathed polluted air.

D)

All of these

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2)

Runoff water from nearby crop fields enters a small lake. How will it affect the lake?

A)

It will cause the lake to dry up.

B)

It will cause algae to grow in the lake.

C)

It will cause the lake to become deeper.

D)

It will cause water in the lake to become solid.

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3)

By which of the following ways can we reuse water?

A)

Use water that is drained out from the washing machine to wash the vegetables.

B)

Use water collected from rain to cook.

C)

Collect water from leaking taps to water plants.

D)

Both (a) and (b)

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4)

Suhani set up the experiment as shown in the given figure. She heated 800 mL of water in flask P until it is completely evaporated. The amount of water collected in flask Q will be about ___.

A)

400 mL

B)

750 mL

C)

800 mL

D)

700 mL

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5)

Which of the things listed below are non-biodegradable?

(i) Paper	(ii) Plastic toys
(iii) Gold necklace	(iv) Roasted apple
(v) Credit card	(vi) Ceramic bowls

A)

(i) and (ii)

B)

(iii), (iv) and (v)

C)

(ii), (iii), (v) and (vi)

D)

(i), (iv) and (vi)

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6)

Select the INCORRECT match from the following.

A)

Causes of soil erosion	Methods of soil conservation
Running water Carries the topsoil with it	Embankments

B)

Causes of soil erosion	Methods of soil conservation
Strong winds blow away humus-rich topsoil	Wind breaks

C)

Causes of soil erosion	Methods of soil conservation
Indiscriminate felling of trees	Afforestation

D)

None of these

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7)

Which of the following will cause water pollution?

A)

Using excessive fertilizers in the field.

B)

Using recycled waste water for cleaning.

C)

Putting unwanted waste in abandoned field.

D)

Both (a) and (c)

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8)

Read the following statements.

1. I am present in air.

2. Plants need me from the air for making food.

3. I am released in the air when you breathe out.

These statements are regarding ___.

A)

Carbon dioxide

B)

Nitrogen

C)

Hydrogen

D)

Oxygen

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9)

In a village, farmers use chemical fertilizers in their fields. A considerable increase in soil pollution was noticed as the farming activity intensified. What could be the most likely reason for this ?

A)

Chemicals used to destroy weed and pest are polluting the field.

B)

Living organisms used in fertilizers are polluting the land.

C)

Smoke particles from the industry got settled in moist surroundings of the field.

D)

Both (a) and (c)

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10)

Which of the following is a cause of acid rain?

A)

Volcanic eruption

B)

Burning of fossil fuels

C)

Releasing of smoke from factories

D)

All of these

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11)

Select the INCORRECT statement about global warming.

(i) The average temperature of the Earth's surface is gradually decreasing.

(ii) Carbon dioxide, methane and nitrous oxide are responsible for global warming,

(iii) The average temperature of the sun's surface is gradually increasing.

A)

(i) only

B)

(i) and (iii) only

C)

(ii) only

D)

(ii) and (iii) only

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12)

Ramit classified few things under two different categories as follows:

X	Y
Plants	Soil
Microbes	Water
Animals	Air

Identify X and Y in the above classification.

A)

X	Y
Biodegradable	Non-biodegradable

B)

X	Y
Biotic	Abiotic

C)

X	Y
Non-biodegradable	Biodegradable

D)

X	Y
Abiotic	Biotic

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13)

The diagram below shows steps of the water cycle.

If O is the first step in the cycle, arrange the rest of the steps in the correct order of a water cycle.

A)

O, N, P, M

B)

O, M, N, P

C)

O, N, M, P

D)

O, P, N, M

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14)

The Earth's atmosphere is made up of various gases. Which of the following best describes this composition of gases?

A)

Oxygen - 78%, Nitrogen - 21%, Others - 1%

B)

Oxygen - 60%, Nitrogen - 30%, Others - 10%

C)

Nitrogen - 78%, Oxygen - 21%, Others - 1%

D)

Nitrogen - 78%, Oxygen - 21%, Carbon dioxide - 1%

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15)

Study the given table showing the bacterial count, oxygen level, and the number of green plants and animals in the river near each of four towns P, Q, R and S. Which town is situated near an unpolluted river?

A)

P

B)

Q

C)

R

D)

S

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16)

Which of the following is the best method of obtaining salt from salted water?

A)

B)

C)

D)

None of these

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17)

Mohit continued to heat 100 mL of pure water for 20 minutes after it reached boiling point. Which of the following figures shows the result at the end of the experiment?

A)

B)

C)

D)

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18)

Which of the following statements is INCORRECT?

A)

Non-biodegradable household wastes can decrease soil fertility.

B)

Planting of trees can help in preventing soil erosion.

C)

Terrace farming helps in preventing landslides.

D)

Cutting down of trees in large numbers is called afforestation.

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19)

Match column I with column II and select the correct option from the given codes.

Column I	Column II
(A) Air pollution (B) Water pollution (C) Soil pollution	1. Asthma 2. Dysentery 3. Barren land 4. Acid rain

A)

(a)-1, (b)-2, 4; (c)-3

B)

(a)-1, 2; (b)-4; (c)-3

C)

(a)-1, 4; (b)-2; (c)-3

D)

(a)-4, (b)-1, 2; (c)-3

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20)

The given picture shows terrace farming. It helps in ___.

A)

Preventing landslides

B)

Reducing soil erosion by water

C)

Reducing soil erosion by deforestation

D)

Both (a) and (b)

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21)

Which one of the following is a useful biological indicator of sulphur dioxide pollution?

A)

Algal blooms

B)

Lichens

C)

Bryophytes

D)

None of these

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22)

How can toxic chemicals in the soil harm you?

A)

They change the weather.

B)

They are absorbed by food grown in the soil.

C)

They purify ground water in the soil.

D)

They cause more air pollution.

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23)

Which country has the highest air pollution level among all European Union countries?

A)

Germany

B)

France

C)

Greece

D)

Poland

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24)

Study the given diagram. What can the bus-driver do to reduce the pollution caused by his bus?

A)

Send the bus for servicing more regularly

B)

Tie a plastic bag around the exhaust pipe

C)

Use a bigger exhaust pipe

D)

Put a silencer at the exhaust pipe

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25)

Who said the below given statement? "Earth provides enough to satisfy every man's need, but not every man's greed".

A)

Jawaharlal Nehru

B)

Subash Chandra Bose

C)

Mahatma Gandhi

D)

None of these

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4th Class General Knowledge Our Environment Question Bank

done Environment and its Conservation Total Questions - 25

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Environment and its Conservation Total Questions - 25