Default Title

Question (11)

QN004872

A student observes that warm moist air is moving upward. What is the most likely next step in rain formation?

(A) The vapour becomes warmer and disappears
(B) The vapour cools and condenses
(C) The vapour becomes soil
(D) The vapour changes into rocks

Correct Answer: B

Explanation:

Rising moist air cools and condenses.

Link:

Report Error

Question (12)

QN004873

Which sequence correctly represents rain formation?

(A) Rain → Cloud → Vapour
(B) Vapour → Droplets → Clouds → Rain
(C) Cloud → Vapour → Rain
(D) Droplets → Vapour → Rain

Correct Answer: B

Explanation:

Water vapour forms droplets, droplets form clouds, and clouds produce rain.

Link:

Report Error

Question (13)

QN004874

A cloud contains many tiny droplets. What causes rainfall?

(A) Droplets becoming smaller
(B) Droplets joining together to form bigger drops
(C) Clouds touching mountains only
(D) Wind stopping completely

Correct Answer: B

Explanation:

Tiny droplets combine to form larger drops that fall as rain.

Link:

Report Error

Question (14)

QN004875

If water vapour did not condense in the atmosphere, clouds would:

(A) Form more quickly
(B) Not form properly
(C) Become oceans
(D) Turn into soil

Correct Answer: B

Explanation:

Condensation is necessary for cloud formation.

Link:

Report Error

Question (15)

QN004876

Water vapour changes into droplets mainly because the air at higher altitudes is:

(A) Dusty
(B) Dry
(C) Cooler
(D) Windy

Correct Answer: C

Explanation:

Cooler air causes condensation.

Link:

Report Error

Question (16)

QN004877

A scientist observes air cooling from 30°C to 5°C while rising upward. Which process becomes more likely?

(A) Melting
(B) Condensation
(C) Boiling
(D) Freezing of soil

Correct Answer: B

Explanation:

Cooling promotes condensation.

Link:

Report Error

Question (17)

QN004878

Which component is specifically mentioned as helping cloud droplets form?

(A) Salt crystals only
(B) Dust particles
(C) Leaves
(D) Insects

Correct Answer: B

Explanation:

Dust particles provide surfaces for condensation.

Link:

Report Error

Question (18)

QN004879

If no dust particles were present in an activity demonstrating cloud formation, haziness would be:

(A) More visible
(B) Less likely to form
(C) Unaffected
(D) Converted into rain immediately

Correct Answer: B

Explanation:

Dust particles help cloud droplets form.

Link:

Report Error

Question (19)

QN004880

In Activity 8.10, what was added to provide tiny invisible dust particles?

(A) Chalk powder
(B) Sand
(C) Burnt newspaper
(D) Sugar

Correct Answer: C

Explanation:

Burnt newspaper provides tiny dust particles.

Link:

Report Error

Question (20)

QN004881

The hazy cloud-like appearance inside the bottle in Activity 8.10 is due to:

(A) Melting
(B) Condensation around dust particles
(C) Freezing of water
(D) Dissolving of paper

Correct Answer: B

Explanation:

Water vapour condenses around dust particles.

Link:

Report Error

Question (11)

A student observes that warm moist air is moving upward. What is the most likely next step in rain formation?

Explanation:

Link:

Question (12)

Which sequence correctly represents rain formation?

Explanation:

Link:

Question (13)

A cloud contains many tiny droplets. What causes rainfall?

Explanation:

Link:

Question (14)

If water vapour did not condense in the atmosphere, clouds would:

Explanation:

Link:

Question (15)

Water vapour changes into droplets mainly because the air at higher altitudes is:

Explanation:

Link:

Question (16)

A scientist observes air cooling from 30°C to 5°C while rising upward. Which process becomes more likely?

Explanation:

Link:

Question (17)

Which component is specifically mentioned as helping cloud droplets form?

Explanation:

Link:

Question (18)

If no dust particles were present in an activity demonstrating cloud formation, haziness would be:

Explanation:

Link:

Question (19)

In Activity 8.10, what was added to provide tiny invisible dust particles?

Explanation:

Link:

Question (20)

The hazy cloud-like appearance inside the bottle in Activity 8.10 is due to:

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY