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Question (1)

QN004350

Which of the following is the main reason that only a few stars are visible in many large cities at night?

(A) Earth’s rotation
(B) Light pollution, smoke and dust
(C) The stars become dimmer
(D) The Moon blocks the stars

Correct Answer: B

Explanation:

Light pollution, smoke and dust reduce visibility of stars.

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Question (2)

QN004351

Excessive artificial light present during night time is referred to as

(A) Air pollution
(B) Thermal pollution
(C) Light pollution
(D) Noise pollution

Correct Answer: C

Explanation:

Excessive artificial light at night is called light pollution.

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Question (3)

QN004352

In areas with less light pollution, a person is likely to see

(A) Fewer stars
(B) More stars
(C) Only planets
(D) Only bright stars

Correct Answer: B

Explanation:

Less light pollution makes more stars visible.

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Question (4)

QN004353

The night sky is best viewed from

(A) A brightly lit market
(B) A room with windows closed
(C) An open dark area
(D) A crowded street

Correct Answer: C

Explanation:

Open dark areas provide the best viewing conditions.

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Question (5)

QN004354

A student observes the sky from a village and sees many more stars than from a city. What is the most likely reason?

(A) Villages are closer to stars
(B) Villages have less light pollution
(C) Stars shine brighter in villages
(D) Earth rotates slower in villages

Correct Answer: B

Explanation:

Villages usually have lower light pollution.

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Question (6)

QN004355

Dark sky reserves are established mainly to

(A) Increase tourism only
(B) Preserve dark skies for research
(C) Grow forests
(D) Predict earthquakes

Correct Answer: B

Explanation:

They help preserve dark skies for astronomical research.

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Question (7)

QN004356

Which factor is controlled in dark sky reserves to preserve the night sky?

(A) Rainfall
(B) Temperature
(C) Light pollution
(D) Wind speed

Correct Answer: C

Explanation:

Light pollution is controlled in such reserves.

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Question (8)

QN004357

Not all constellations are visible from all places on Earth because

(A) Some stars disappear permanently
(B) Visibility depends on location and time of year
(C) Stars change colour regularly
(D) Constellations move to other galaxies

Correct Answer: B

Explanation:

Visibility depends on location and season.

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Question (9)

QN004358

Which star mentioned in the chapter is not visible from the Southern Hemisphere?

(A) Sirius
(B) Betelgeuse
(C) Pole Star
(D) Aldebaran

Correct Answer: C

Explanation:

The Pole Star is not visible from the Southern Hemisphere.

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Question (10)

QN004359

To identify a constellation correctly, a student must know

(A) Its colour only
(B) Its pattern and where to look in the sky
(C) Its temperature
(D) Its distance from Earth

Correct Answer: B

Explanation:

Knowledge of pattern and location is necessary.

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Question (1)

Which of the following is the main reason that only a few stars are visible in many large cities at night?

Explanation:

Link:

Question (2)

Excessive artificial light present during night time is referred to as

Explanation:

Link:

Question (3)

In areas with less light pollution, a person is likely to see

Explanation:

Link:

Question (4)

The night sky is best viewed from

Explanation:

Link:

Question (5)

A student observes the sky from a village and sees many more stars than from a city. What is the most likely reason?

Explanation:

Link:

Question (6)

Dark sky reserves are established mainly to

Explanation:

Link:

Question (7)

Which factor is controlled in dark sky reserves to preserve the night sky?

Explanation:

Link:

Question (8)

Not all constellations are visible from all places on Earth because

Explanation:

Link:

Question (9)

Which star mentioned in the chapter is not visible from the Southern Hemisphere?

Explanation:

Link:

Question (10)

To identify a constellation correctly, a student must know

Explanation:

Link:

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