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Question (11)

QN0031318

If Proxima Centauri is about 269000 au away from Earth and 1 au is the Earth-Sun distance, then Proxima Centauri is approximately how many times farther from Earth than the Sun is?

(A) 269 times
(B) 2690 times
(C) 26900 times
(D) 269000 times

Correct Answer: D

Explanation:

Since Proxima Centauri is 269000 au away, it is 269000 times farther than the Sun.

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Question (12)

QN0031319

A student notices that one bright object in the sky hardly twinkles, whereas nearby stars twinkle noticeably. The object is most likely a

(A) comet
(B) planet
(C) galaxy
(D) constellation

Correct Answer: B

Explanation:

Planets generally do not twinkle as much as stars.

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Question (13)

QN0031320

Which of the following correctly arranges the objects from smallest to largest scale?

(A) Galaxy → Solar System → Universe
(B) Solar System → Galaxy → Universe
(C) Universe → Galaxy → Solar System
(D) Galaxy → Universe → Solar System

Correct Answer: B

Explanation:

The Solar System is part of a galaxy, and galaxies together form the Universe.

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Question (14)

QN0031321

A student observes the Big Dipper at 9 p.m., midnight, and 3 a.m. and finds its position has changed. This apparent movement is mainly due to

(A) movement of the Pole Star
(B) Earth's rotation
(C) change in seasons
(D) movement of the Sun

Correct Answer: B

Explanation:

Earth's rotation causes stars and constellations to appear to move across the sky.

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Question (15)

QN0031322

The Moon is about one-fourth the diameter of Earth. If Earth's diameter is assumed to be 12,000 km, the Moon's approximate diameter would be

(A) 1,500 km
(B) 3,000 km
(C) 6,000 km
(D) 9,000 km

Correct Answer: B

Explanation:

Moon's diameter = 12000 ÷ 4 = 3000 km.

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Question (16)

QN0031323

Which of the following is NOT a natural satellite?

(A) Moon
(B) One of Jupiter's moons
(C) Earth revolving around the Sun
(D) Mars' moon Phobos

Correct Answer: C

Explanation:

Natural satellites are moons that revolve around planets. Earth revolving around the Sun is a planet's revolution.

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Question (17)

QN0031324

An astronomer wants to study very faint celestial objects not visible to the naked eye. Which instrument would be most useful?

(A) Magnetic compass
(B) Binoculars only
(C) Telescope
(D) Torch

Correct Answer: C

Explanation:

A telescope gathers more light and helps observe faint celestial objects.

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Question (18)

QN0031325

A rocky object of irregular shape is found orbiting the Sun between Mars and Jupiter. It is most likely a

(A) comet
(B) asteroid
(C) moon
(D) planet

Correct Answer: B

Explanation:

Most asteroids are found in the asteroid belt located between Mars and Jupiter.

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Question (19)

QN0031326

If Halley's Comet appears every 76 years and was last seen in 1986, approximately when will it next appear?

(A) 2026
(B) 2042
(C) 2062
(D) 2076

Correct Answer: C

Explanation:

Next appearance = 1986 + 76 = 2062.

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Question (20)

QN0031327

Scientists searching for life beyond Earth mainly study exoplanets because exoplanets are

(A) planets orbiting other stars
(B) stars outside the Milky Way
(C) moons of Jupiter
(D) comets with long tails

Correct Answer: A

Explanation:

Exoplanets are planets revolving around stars other than the Sun and are important in the search for extraterrestrial life.

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Question (11)

If Proxima Centauri is about 269000 au away from Earth and 1 au is the Earth-Sun distance, then Proxima Centauri is approximately how many times farther from Earth than the Sun is?

Explanation:

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Question (12)

A student notices that one bright object in the sky hardly twinkles, whereas nearby stars twinkle noticeably. The object is most likely a

Explanation:

Link:

Question (13)

Which of the following correctly arranges the objects from smallest to largest scale?

Explanation:

Link:

Question (14)

A student observes the Big Dipper at 9 p.m., midnight, and 3 a.m. and finds its position has changed. This apparent movement is mainly due to

Explanation:

Link:

Question (15)

The Moon is about one-fourth the diameter of Earth. If Earth's diameter is assumed to be 12,000 km, the Moon's approximate diameter would be

Explanation:

Link:

Question (16)

Which of the following is NOT a natural satellite?

Explanation:

Link:

Question (17)

An astronomer wants to study very faint celestial objects not visible to the naked eye. Which instrument would be most useful?

Explanation:

Link:

Question (18)

A rocky object of irregular shape is found orbiting the Sun between Mars and Jupiter. It is most likely a

Explanation:

Link:

Question (19)

If Halley's Comet appears every 76 years and was last seen in 1986, approximately when will it next appear?

Explanation:

Link:

Question (20)

Scientists searching for life beyond Earth mainly study exoplanets because exoplanets are

Explanation:

Link:

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