Stars and the Solar System Part 4: MCQs (Q76–Q100)
🌌 Stars and the Solar System – MCQs for Class 8 Science
Part 4: Q76–Q100
Q76. The planets that do not have moons are:
A) Mercury and Venus
B) Earth and Mars
C) Saturn and Uranus
D) Neptune and Jupiter
✅ Correct Answer: A) Mercury and Venus
Explanation:
- A) ✔ Mercury and Venus are the only planets with no natural satellites.
Q77. The star which never changes its position in the sky is:
A) Sirius
B) Polaris
C) Betelgeuse
D) Rigel
✅ Correct Answer: B) Polaris
Explanation:
- B) ✔ The Pole Star appears fixed in the northern sky.
Q78. Which planet is known as the “Ringed Planet”?
A) Saturn
B) Jupiter
C) Neptune
D) Uranus
✅ Correct Answer: A) Saturn
Explanation:
- A) ✔ Saturn has the most prominent ring system.
Q79. Which planet has the highest surface temperature?
A) Mercury
B) Venus
C) Mars
D) Jupiter
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Due to greenhouse effect, Venus is hotter than Mercury.
Q80. The main source of energy for life on Earth is:
A) Moon
B) Sun
C) Stars
D) Planets
✅ Correct Answer: B) Sun
Explanation:
- B) ✔ Sun provides light and heat energy necessary for life.
Q81. The number of planets in the solar system is:
A) 7
B) 8
C) 9
D) 10
✅ Correct Answer: B) 8
Explanation:
- B) ✔ After Pluto’s reclassification, 8 planets remain.
Q82. Which constellation is called the “Great Bear”?
A) Orion
B) Ursa Major
C) Cassiopeia
D) Leo
✅ Correct Answer: B) Ursa Major
Explanation:
- B) ✔ Ursa Major resembles a large bear or a big dipper.
Q83. The Earth’s axis is tilted at an angle of:
A) 30°
B) 23.5°
C) 15°
D) 45°
✅ Correct Answer: B) 23.5°
Explanation:
- B) ✔ Earth’s tilt is responsible for seasons.
Q84. The time taken by the Moon to complete one rotation on its axis is:
A) 365 days
B) 30 days
C) 27.3 days
D) 24 hours
✅ Correct Answer: C) 27.3 days
Explanation:
- C) ✔ Moon’s rotation period = revolution period → synchronous rotation.
Q85. The Moon always shows the same face to Earth because:
A) It does not rotate
B) Its rotation and revolution times are equal
C) It rotates too fast
D) It has no atmosphere
✅ Correct Answer: B) Its rotation and revolution times are equal
Explanation:
- B) ✔ Both take 27.3 days, so the same side faces Earth.
Q86. Which is the hottest planet in the solar system?
A) Mercury
B) Venus
C) Jupiter
D) Neptune
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Due to thick CO₂ atmosphere, Venus is hottest.
Q87. Which spacecraft carried humans to the Moon for the first time?
A) Sputnik-1
B) Apollo-11
C) Challenger
D) Voyager-1
✅ Correct Answer: B) Apollo-11
Explanation:
- B) ✔ Apollo-11 in 1969 carried Neil Armstrong and Buzz Aldrin.
Q88. The shape of the orbit of planets is:
A) Circular
B) Elliptical
C) Spiral
D) Rectangular
✅ Correct Answer: B) Elliptical
Explanation:
- B) ✔ As per Kepler’s laws, planetary orbits are elliptical.
Q89. The distance travelled by light in one year is called:
A) Parsec
B) Astronomical Unit
C) Light year
D) Kilometer
✅ Correct Answer: C) Light year
Explanation:
- C) ✔ Light year = distance travelled by light in one year.
Q90. Which planet is tilted most on its axis?
A) Venus
B) Uranus
C) Neptune
D) Saturn
✅ Correct Answer: B) Uranus
Explanation:
- B) ✔ Uranus has a tilt of about 98°, so it rolls on its side.
Q91. The first Indian woman in space was:
A) Sunita Williams
B) Kalpana Chawla
C) Valentina Tereshkova
D) Indira Gandhi
✅ Correct Answer: B) Kalpana Chawla
Explanation:
- B) ✔ Kalpana Chawla went to space in 1997.
Q92. The first human in space was:
A) Neil Armstrong
B) Rakesh Sharma
C) Yuri Gagarin
D) Edwin Aldrin
✅ Correct Answer: C) Yuri Gagarin
Explanation:
- C) ✔ In 1961, Yuri Gagarin was the first human to orbit Earth.
Q93. The largest asteroid belt lies between:
A) Earth and Mars
B) Mars and Jupiter
C) Jupiter and Saturn
D) Saturn and Uranus
✅ Correct Answer: B) Mars and Jupiter
Explanation:
- B) ✔ The asteroid belt exists between Mars and Jupiter.
Q94. The tail of a comet always points:
A) Towards the Sun
B) Away from the Sun
C) Towards Earth
D) In a fixed direction
✅ Correct Answer: B) Away from the Sun
Explanation:
- B) ✔ Solar wind pushes the comet’s tail away from the Sun.
Q95. Which planet is known as the “Red Planet”?
A) Jupiter
B) Saturn
C) Mars
D) Mercury
✅ Correct Answer: C) Mars
Explanation:
- C) ✔ Mars looks red due to iron oxide on its surface.
Q96. The outermost layer of the Sun visible during an eclipse is:
A) Photosphere
B) Corona
C) Chromosphere
D) Core
✅ Correct Answer: B) Corona
Explanation:
- B) ✔ The corona appears as a halo during solar eclipses.
Q97. Which planet has the fastest winds?
A) Jupiter
B) Neptune
C) Venus
D) Uranus
✅ Correct Answer: B) Neptune
Explanation:
- B) ✔ Winds on Neptune reach ~2,000 km/h.
Q98. The planet that spins in the opposite direction of most planets is:
A) Venus
B) Saturn
C) Earth
D) Mars
✅ Correct Answer: A) Venus
Explanation:
- A) ✔ Venus rotates east to west (retrograde rotation).
Q99. The group of stars forming a pattern called “Hunter” is:
A) Orion
B) Ursa Major
C) Cassiopeia
D) Leo
✅ Correct Answer: A) Orion
Explanation:
- A) ✔ Orion looks like a hunter with a belt of three stars.
Q100. The solar system is part of which galaxy?
A) Andromeda
B) Whirlpool Galaxy
C) Milky Way
D) Sombrero Galaxy
✅ Correct Answer: C) Milky Way
Explanation:
- C) ✔ Our solar system lies in the Milky Way Galaxy.
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