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Question (1)

QN0031748

A school stores 500 litres of water in a tank. During the day, 185 litres are used for drinking and 165 litres for cleaning. How much water is left in the tank?

(A) 130 litres
(B) 140 litres
(C) 150 litres
(D) 160 litres

Correct Answer: C

Explanation:

Water used = 185 + 165 = 350 litres. Water left = 500 − 350 = 150 litres.

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Question (2)

QN0031749

Which sequence correctly shows the movement of water in the water cycle?

(A) Clouds → Oceans → Sun → Rain
(B) Evaporation → Clouds → Rain → Rivers/Oceans
(C) Rain → Clouds → Sun → Oceans
(D) Rivers → Clouds → Rain → Sun

Correct Answer: B

Explanation:

Water evaporates due to the Sun's heat, forms clouds, falls as rain and finally returns to rivers and oceans.

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Question (3)

QN0031750

A farmer has four fields. Which field will help maximum groundwater recharge during rainfall?

(A) Completely cemented field
(B) Field covered with plastic sheets
(C) Open grassy field with soak pits
(D) Asphalt-covered field

Correct Answer: C

Explanation:

Open soil and soak pits allow rainwater to seep underground and recharge groundwater.

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Question (4)

QN0031751

Rohan places three bowls under different conditions. Bowl P is kept in bright sunlight, Bowl Q in a cool room and Bowl R inside a refrigerator. In which bowl will the water level decrease the fastest?

(A) Bowl P
(B) Bowl Q
(C) Bowl R
(D) All equally

Correct Answer: A

Explanation:

Higher temperature increases evaporation. Therefore, water evaporates fastest in bright sunlight.

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Question (5)

QN0031752

If 200 mL of water represents all the water on Earth, approximately how much represents freshwater according to the chapter?

(A) 50 mL
(B) 20 mL
(C) 10 mL
(D) 5 mL

Correct Answer: D

Explanation:

The chapter compares all the Earth's water with 200 mL and freshwater with only about 5 mL (one teaspoon).

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Question (6)

QN0031753

Four students made the following statements. P. Ice changes into water on heating. Q. Steam changes into water on cooling. R. Groundwater is stored beneath the Earth's surface. S. Ocean water is suitable for drinking without treatment. Which statement is incorrect?

(A) P
(B) Q
(C) R
(D) S

Correct Answer: D

Explanation:

Ocean water contains a large amount of dissolved salts and is not fit for drinking without treatment.

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Question (7)

QN0031754

During a model activity, mustard seeds are poured on a crumpled newspaper. The seeds move in different directions and collect in lower places. This activity mainly explains that—

(A) Rivers always flow in straight lines.
(B) Water flows according to the shape of the land.
(C) Rivers flow only from south to north.
(D) Rivers never change direction.

Correct Answer: B

Explanation:

Landforms guide the flow of rivers, causing them to bend, spread or collect in low-lying areas.

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Question (8)

QN0031755

Which pair is correctly matched?

(A) Ice – Water vapour
(B) Steam – Liquid water
(C) Snow – Solid form of water
(D) Rain – Solid water

Correct Answer: C

Explanation:

Snow and ice are solid forms of water, whereas steam is water vapour.

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Question (9)

QN0031756

A pond has lotus plants, fish, frogs and pond herons. If all the fish disappear, which animal is most likely to face difficulty in getting food?

(A) Lotus
(B) Pond heron
(C) Water lily
(D) Reeds

Correct Answer: B

Explanation:

Pond herons feed mainly on fish. If fish disappear, they will have less food.

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Question (10)

QN0031757

A village receives heavy rainfall, but after a few months the wells become dry because most roads and open areas have been covered with concrete. What is the most likely reason?

(A) More clouds are formed.
(B) Rainwater cannot seep into the ground to recharge groundwater.
(C) Rivers stop flowing.
(D) Water changes directly into ice.

Correct Answer: B

Explanation:

Concrete surfaces prevent rainwater from entering the soil. As a result, groundwater is not recharged and wells may dry up.

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Question (1)

A school stores 500 litres of water in a tank. During the day, 185 litres are used for drinking and 165 litres for cleaning. How much water is left in the tank?

Explanation:

Link:

Question (2)

Which sequence correctly shows the movement of water in the water cycle?

Explanation:

Link:

Question (3)

A farmer has four fields. Which field will help maximum groundwater recharge during rainfall?

Explanation:

Link:

Question (4)

Rohan places three bowls under different conditions. Bowl P is kept in bright sunlight, Bowl Q in a cool room and Bowl R inside a refrigerator. In which bowl will the water level decrease the fastest?

Explanation:

Link:

Question (5)

If 200 mL of water represents all the water on Earth, approximately how much represents freshwater according to the chapter?

Explanation:

Link:

Question (6)

Four students made the following statements. P. Ice changes into water on heating. Q. Steam changes into water on cooling. R. Groundwater is stored beneath the Earth's surface. S. Ocean water is suitable for drinking without treatment. Which statement is incorrect?

Explanation:

Link:

Question (7)

During a model activity, mustard seeds are poured on a crumpled newspaper. The seeds move in different directions and collect in lower places. This activity mainly explains that—

Explanation:

Link:

Question (8)

Which pair is correctly matched?

Explanation:

Link:

Question (9)

A pond has lotus plants, fish, frogs and pond herons. If all the fish disappear, which animal is most likely to face difficulty in getting food?

Explanation:

Link:

Question (10)

A village receives heavy rainfall, but after a few months the wells become dry because most roads and open areas have been covered with concrete. What is the most likely reason?

Explanation:

Link:

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