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Question (21)

QN00371

Which condition is most suitable for fast evaporation?

(A) High temperature and strong wind
(B) Low temperature and still air
(C) High humidity and low temperature
(D) Closed room and cool weather

Correct Answer: A

Explanation:

Heat and wind increase evaporation rate.

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Question (22)

QN00372

Water droplets seen on grass early in the morning are formed by —

(A) evaporation
(B) transpiration
(C) condensation
(D) boiling

Correct Answer: C

Explanation:

Dew forms due to condensation.

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Question (23)

QN00373

Which of the following mainly helps in cloud formation?

(A) Heating of soil only
(B) Condensation of water vapour
(C) Freezing of rivers
(D) Filtration of water

Correct Answer: B

Explanation:

Clouds form by condensation.

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Question (24)

QN00374

Which form of precipitation falls as ice crystals?

(A) Rain
(B) Dew
(C) Snow
(D) Mist

Correct Answer: C

Explanation:

Snow falls as ice crystals.

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Question (25)

QN00375

The water cycle helps in —

(A) increasing pollution only
(B) continuous supply of fresh water
(C) stopping evaporation
(D) reducing sunlight

Correct Answer: B

Explanation:

Water cycle maintains freshwater supply.

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Question (26)

QN00376

Which statement correctly describes evaporation?

(A) Water vapour changes to liquid
(B) Liquid water changes into vapour
(C) Ice changes directly into vapour
(D) Water changes into solid

Correct Answer: B

Explanation:

Evaporation converts liquid into vapour.

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Question (27)

QN00377

Which of the following surfaces would dry fastest after rain?

(A) Shaded ground
(B) Sunny open playground
(C) Closed room floor
(D) Underground tunnel

Correct Answer: B

Explanation:

Sunlight increases evaporation.

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Question (28)

QN00378

In the water cycle, oceans mainly contribute through —

(A) condensation
(B) transpiration
(C) evaporation
(D) freezing

Correct Answer: C

Explanation:

Ocean water evaporates continuously.

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Question (29)

QN00379

What happens to water vapour when it reaches cooler upper layers of atmosphere?

(A) It melts
(B) It condenses
(C) It evaporates faster
(D) It disappears completely

Correct Answer: B

Explanation:

Cooling causes condensation.

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Question (30)

QN00380

Which factor decreases the rate of evaporation?

(A) Strong wind
(B) High temperature
(C) High humidity
(D) Large surface area

Correct Answer: C

Explanation:

Moist air slows down evaporation.

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Question (21)

Which condition is most suitable for fast evaporation?

Explanation:

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Question (22)

Water droplets seen on grass early in the morning are formed by —

Explanation:

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Question (23)

Which of the following mainly helps in cloud formation?

Explanation:

Link:

Question (24)

Which form of precipitation falls as ice crystals?

Explanation:

Link:

Question (25)

The water cycle helps in —

Explanation:

Link:

Question (26)

Which statement correctly describes evaporation?

Explanation:

Link:

Question (27)

Which of the following surfaces would dry fastest after rain?

Explanation:

Link:

Question (28)

In the water cycle, oceans mainly contribute through —

Explanation:

Link:

Question (29)

What happens to water vapour when it reaches cooler upper layers of atmosphere?

Explanation:

Link:

Question (30)

Which factor decreases the rate of evaporation?

Explanation:

Link:

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