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Question (31)

QN00381

Why are clouds usually formed high in the atmosphere?

(A) Temperature is lower there
(B) Air pressure is absent
(C) Sunlight is stronger there
(D) Gravity is weaker there

Correct Answer: A

Explanation:

Cooler temperatures help condensation.

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Question (32)

QN00382

Which process returns atmospheric water back to Earth?

(A) Transpiration
(B) Evaporation
(C) Precipitation
(D) Condensation

Correct Answer: C

Explanation:

Rainfall and snowfall return water to Earth.

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Question (33)

QN00383

Fog is formed when water vapour —

(A) freezes immediately
(B) condenses near Earth’s surface
(C) evaporates rapidly
(D) mixes with smoke only

Correct Answer: B

Explanation:

Fog forms by condensation near ground level.

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Question (34)

QN00384

Which activity demonstrates evaporation clearly?

(A) Formation of ice cubes
(B) Steam changing to water
(C) Drying of spilled water on the floor
(D) Snowfall on mountains

Correct Answer: C

Explanation:

Spilled water disappears by evaporation.

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Question (35)

QN00385

Which of the following is a direct result of condensation?

(A) Drying of clothes
(B) Formation of clouds
(C) Heating of water
(D) Melting of ice

Correct Answer: B

Explanation:

Condensation forms clouds.

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Question (36)

QN00386

Water falling from clouds in liquid form is called —

(A) snow
(B) frost
(C) rain
(D) hail

Correct Answer: C

Explanation:

Rain is liquid precipitation.

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Question (37)

QN00387

Which process helps maintain the balance of water on Earth?

(A) Water cycle
(B) Combustion
(C) Photosynthesis
(D) Digestion

Correct Answer: A

Explanation:

Water cycle continuously circulates water.

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Question (38)

QN00388

Why is the water cycle important for living organisms?

(A) It increases salt in oceans
(B) It provides continuous freshwater supply
(C) It reduces sunlight
(D) It prevents evaporation completely

Correct Answer: B

Explanation:

Living organisms depend on freshwater.

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Question (39)

QN00389

Which process occurs when ice directly changes into water vapour?

(A) Condensation
(B) Melting
(C) Sublimation
(D) Freezing

Correct Answer: C

Explanation:

Sublimation changes solid directly into vapour.

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Question (40)

QN00390

Which sequence correctly represents the water cycle?

(A) Condensation → Evaporation → Rainfall
(B) Rainfall → Condensation → Evaporation
(C) Evaporation → Condensation → Precipitation
(D) Freezing → Melting → Condensation

Correct Answer: C

Explanation:

Water evaporates, condenses and falls as precipitation.

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Question (31)

Why are clouds usually formed high in the atmosphere?

Explanation:

Link:

Question (32)

Which process returns atmospheric water back to Earth?

Explanation:

Link:

Question (33)

Fog is formed when water vapour —

Explanation:

Link:

Question (34)

Which activity demonstrates evaporation clearly?

Explanation:

Link:

Question (35)

Which of the following is a direct result of condensation?

Explanation:

Link:

Question (36)

Water falling from clouds in liquid form is called —

Explanation:

Link:

Question (37)

Which process helps maintain the balance of water on Earth?

Explanation:

Link:

Question (38)

Why is the water cycle important for living organisms?

Explanation:

Link:

Question (39)

Which process occurs when ice directly changes into water vapour?

Explanation:

Link:

Question (40)

Which sequence correctly represents the water cycle?

Explanation:

Link:

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