Planets of Solar System MCQs
Planets of Solar System MCQs Class 8
Class: CBSE Class 8
Subject: Science
Section: 17 – Stars and the Solar System
Topic: Planets of Solar System MCQs
Subject: Science
Section: 17 – Stars and the Solar System
Topic: Planets of Solar System MCQs
Strictly Based on NCERT Syllabus | Ideal for CBSE Board Examinations
1. How many planets are there in the Solar System?
Answer: B. 8
Explanation: After Pluto was reclassified as a dwarf planet, the Solar System has 8 planets.
Explanation: After Pluto was reclassified as a dwarf planet, the Solar System has 8 planets.
2. The planet closest to the Sun is:
Answer: C. Mercury
Explanation: Mercury is the nearest planet and has extreme temperatures.
Explanation: Mercury is the nearest planet and has extreme temperatures.
3. The largest planet is:
Answer: B. Jupiter
Explanation: Jupiter is a gas giant and the biggest planet in our Solar System.
Explanation: Jupiter is a gas giant and the biggest planet in our Solar System.
4. The planet known as Earth’s twin is:
Answer: B. Venus
Explanation: Venus is similar in size and structure to Earth.
Explanation: Venus is similar in size and structure to Earth.
5. The Red Planet is:
Answer: B. Mars
Explanation: Iron oxide on Mars gives it a reddish appearance.
Explanation: Iron oxide on Mars gives it a reddish appearance.
6. The planet with rings is:
Answer: B. Saturn
Explanation: Saturn has prominent rings made of ice and rock.
Explanation: Saturn has prominent rings made of ice and rock.
7. The hottest planet is:
Answer: B. Venus
Explanation: Thick CO₂ atmosphere causes extreme greenhouse heating.
Explanation: Thick CO₂ atmosphere causes extreme greenhouse heating.
8. The planet farthest from the Sun is:
Answer: B. Neptune
Explanation: Neptune is the outermost planet in the Solar System.
Explanation: Neptune is the outermost planet in the Solar System.
9. The only planet supporting life is:
Answer: B. Earth
Explanation: Earth has water, oxygen, and suitable temperature.
Explanation: Earth has water, oxygen, and suitable temperature.
10. Gas giants include:
Answer: B. Jupiter & Saturn
Explanation: They are mainly made of hydrogen and helium.
Explanation: They are mainly made of hydrogen and helium.
11. Uranus rotates on its:
Answer: B. Side
Explanation: Uranus has a tilted axis (~98°).
Explanation: Uranus has a tilted axis (~98°).
12. The smallest planet is:
Answer: B. Mercury
Explanation: Mercury is the smallest among the 8 planets.
Explanation: Mercury is the smallest among the 8 planets.
13. Blue planet refers to:
Answer: B. Earth
Explanation: Water makes Earth appear blue from space.
Explanation: Water makes Earth appear blue from space.
14. Fastest orbiting planet:
Answer: A. Mercury
Explanation: Closest planets move fastest around the Sun.
Explanation: Closest planets move fastest around the Sun.
15. Day longest on:
Answer: C. Venus
Explanation: Venus rotates very slowly.
Explanation: Venus rotates very slowly.
16. Coldest planet:
Answer: B. Uranus
Explanation: It has extremely low atmospheric temperatures.
Explanation: It has extremely low atmospheric temperatures.
17. Planet with Great Red Spot:
Answer: B. Jupiter
Explanation: It is a giant storm persisting for centuries.
Explanation: It is a giant storm persisting for centuries.
18. Planets revolve in:
Answer: C. Elliptical orbits
Explanation: As per Kepler’s laws.
Explanation: As per Kepler’s laws.
19. Inner planets are:
Answer: B. Terrestrial planets
Explanation: Mercury–Mars are rocky planets.
Explanation: Mercury–Mars are rocky planets.
20. Gravity keeps planets:
Answer: C. In orbit
Explanation: Sun’s gravity holds planets in their paths.
Explanation: Sun’s gravity holds planets in their paths.
