Stars and the Solar System Part 3: MCQs (Q51–Q75)
🌌 Stars and the Solar System – MCQs for Class 8 Science
Part 3: Q51–Q75
Q51. Which planet is known as the “Morning Star” and “Evening Star”?
A) Mars
B) Venus
C) Mercury
D) Saturn
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Venus is visible before sunrise and after sunset, hence both names.
Q52. Which object in the solar system is called a “shooting star”?
A) Asteroid
B) Meteor
C) Comet
D) Satellite
✅ Correct Answer: B) Meteor
Explanation:
- B) ✔ Meteors burn due to friction in Earth’s atmosphere and appear as shooting stars.
Q53. Which planet is also called the “Green Planet”?
A) Neptune
B) Venus
C) Uranus
D) Jupiter
✅ Correct Answer: C) Uranus
Explanation:
- C) ✔ Uranus appears bluish-green due to methane in its atmosphere.
Q54. The revolution of Earth around the Sun causes:
A) Day and night
B) Seasons
C) Phases of the Moon
D) Tides
✅ Correct Answer: B) Seasons
Explanation:
- B) ✔ Earth’s tilted axis and revolution cause seasons.
- A) Rotation causes day and night.
Q55. The rotation of Earth on its axis causes:
A) Seasons
B) Phases of the Moon
C) Day and night
D) Yearly calendar
✅ Correct Answer: C) Day and night
Explanation:
- C) ✔ Earth’s 24-hour rotation results in day and night cycle.
Q56. Which planet is closest to the Sun?
A) Venus
B) Mercury
C) Earth
D) Mars
✅ Correct Answer: B) Mercury
Explanation:
- B) ✔ Mercury is the innermost planet of the solar system.
Q57. Which constellation is shaped like a “W”?
A) Orion
B) Cassiopeia
C) Ursa Minor
D) Leo
✅ Correct Answer: B) Cassiopeia
Explanation:
- B) ✔ Cassiopeia is a prominent ‘W’ shaped constellation.
Q58. Which planet is called the “Earth’s twin” because of its size and mass?
A) Mars
B) Venus
C) Neptune
D) Uranus
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Venus is nearly equal in size and structure to Earth.
Q59. Which planet has the largest number of moons discovered so far?
A) Jupiter
B) Saturn
C) Neptune
D) Uranus
✅ Correct Answer: B) Saturn
Explanation:
- B) ✔ Saturn currently holds the record for most moons.
Q60. Which planet is known for its extreme greenhouse effect?
A) Earth
B) Venus
C) Mars
D) Jupiter
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Venus has dense CO₂ atmosphere causing very high temperatures.
Q61. Which celestial body has icy tails that glow when close to the Sun?
A) Meteor
B) Asteroid
C) Comet
D) Dwarf planet
✅ Correct Answer: C) Comet
Explanation:
- C) ✔ Comets develop glowing tails as solar heat vaporizes their ice.
Q62. The planet with the slowest rotation is:
A) Mars
B) Venus
C) Mercury
D) Neptune
✅ Correct Answer: B) Venus
Explanation:
- B) ✔ Venus rotates once in 243 Earth days, very slow.
Q63. The largest satellite in the solar system is:
A) Titan
B) Ganymede
C) Europa
D) Moon
✅ Correct Answer: B) Ganymede
Explanation:
- B) ✔ Ganymede (moon of Jupiter) is the largest satellite, bigger than Mercury.
Q64. The Moon does not have an atmosphere because:
A) It is too far from Earth
B) It has weak gravity
C) It is very hot
D) It revolves slowly
✅ Correct Answer: B) It has weak gravity
Explanation:
- B) ✔ Weak gravity cannot hold gases → no atmosphere.
Q65. The first woman astronaut of Indian origin in space was:
A) Sunita Williams
B) Kalpana Chawla
C) Valentina Tereshkova
D) Sally Ride
✅ Correct Answer: B) Kalpana Chawla
Explanation:
- B) ✔ Kalpana Chawla went to space in 1997 (Space Shuttle Columbia).
Q66. Which satellite is used for communication on Earth?
A) INSAT
B) Aryabhata
C) Rohini
D) Bhaskara
✅ Correct Answer: A) INSAT
Explanation:
- A) ✔ INSAT series satellites are used for communication and weather.
Q67. The motion of the Moon around the Earth is:
A) Circular
B) Elliptical
C) Spiral
D) Straight line
✅ Correct Answer: B) Elliptical
Explanation:
- B) ✔ The Moon revolves in an elliptical orbit around Earth.
Q68. The solar eclipse occurs when:
A) Earth comes between Sun and Moon
B) Moon comes between Sun and Earth
C) Sun comes between Earth and Moon
D) Earth’s shadow falls on Moon
✅ Correct Answer: B) Moon comes between Sun and Earth
Explanation:
- B) ✔ Moon blocks sunlight → solar eclipse.
Q69. The lunar eclipse occurs when:
A) Moon comes between Earth and Sun
B) Earth comes between Sun and Moon
C) Sun comes between Earth and Moon
D) Earth blocks Sunlight completely
✅ Correct Answer: B) Earth comes between Sun and Moon
Explanation:
- B) ✔ Earth’s shadow falls on the Moon → lunar eclipse.
Q70. The time taken by Earth to revolve around the Sun once is:
A) 24 hours
B) 30 days
C) 365 days
D) 27.3 days
✅ Correct Answer: C) 365 days
Explanation:
- C) ✔ One revolution around the Sun = one year.
Q71. The faint band of light seen across the night sky is called:
A) Nebula
B) Milky Way
C) Orion
D) Cassiopeia
✅ Correct Answer: B) Milky Way
Explanation:
- B) ✔ Our galaxy appears as a faint whitish band at night.
Q72. The celestial body that once was called the ninth planet is:
A) Titan
B) Pluto
C) Ganymede
D) Ceres
✅ Correct Answer: B) Pluto
Explanation:
- B) ✔ Pluto was reclassified as a dwarf planet in 2006.
Q73. Which planet is known as the “Windy Planet”?
A) Earth
B) Mars
C) Neptune
D) Venus
✅ Correct Answer: C) Neptune
Explanation:
- C) ✔ Neptune has the fastest winds in the solar system.
Q74. The gas that gives Neptune and Uranus their blue colour is:
A) Oxygen
B) Hydrogen
C) Methane
D) Nitrogen
✅ Correct Answer: C) Methane
Explanation:
- C) ✔ Methane absorbs red light and reflects blue, making planets look bluish.
Q75. The planet that spins on its side is:
A) Uranus
B) Neptune
C) Saturn
D) Mercury
✅ Correct Answer: A) Uranus
Explanation:
- A) ✔ Uranus is tilted at about 98°, making it spin sideways.
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