Solar System - Practice Test 2

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.The Earth is located between which two planets?

   • A.Venus and Mars✓ Correct Answer
   • B.Mercury and Venus
   • C.Mars and Jupiter
   • D.Venus and Jupiter

   Explanation: Earth orbits between Venus and Mars.

2. Q2.What is the shape of the Earth?

   • A.Perfect Sphere
   • B.Geoid✓ Correct Answer
   • C.Flat
   • D.Oval

   Explanation: Earth is an oblate spheroid, termed 'Geoid' (Earth-shaped).

3. Q3.How much time does Earth take to rotate on its axis?

   • A.24 hours exactly
   • B.23 hrs 56 mins 4 secs✓ Correct Answer
   • C.24 hrs 30 mins
   • D.23 hrs 50 mins

   Explanation: The sidereal rotation period is 23 hours, 56 minutes, and 4 seconds.

4. Q4.Which planet is called the 'Blue Planet'?

   • A.Neptune
   • B.Earth✓ Correct Answer
   • C.Uranus
   • D.Venus

   Explanation: Earth appears blue from space due to its water bodies.

5. Q5.The Moon is Earth's only:

   • A.Artificial Satellite
   • B.Natural Satellite✓ Correct Answer
   • C.Asteroid
   • D.Star

   Explanation: The Moon is the only natural satellite of Earth.

6. Q6.The light from the Moon reaches Earth in approximately:

   • A.1.3 seconds✓ Correct Answer
   • B.8 minutes
   • C.5 seconds
   • D.1 minute

   Explanation: Moonlight takes about 1.28 to 1.3 seconds to reach Earth.

7. Q7.Which planet is known as the 'Red Planet'?

   • A.Venus
   • B.Mars✓ Correct Answer
   • C.Jupiter
   • D.Saturn

   Explanation: Mars appears red due to iron oxide (rust) on its surface.

8. Q8.The two moons of Mars are named:

   • A.Titan and Rhea
   • B.Phobos and Deimos✓ Correct Answer
   • C.Io and Europa
   • D.Ganymede and Callisto

   Explanation: Mars has two small irregular moons: Phobos and Deimos.

9. Q9.Which is the highest mountain/volcano on Mars?

   • A.Mount Everest
   • B.Olympus Mons✓ Correct Answer
   • C.Mauna Kea
   • D.Maxwell Montes

   Explanation: Olympus Mons is the largest volcano in the solar system, nearly 3 times the height of Everest.

10. Q10.Which is the largest planet in the solar system?

    • A.Saturn
    • B.Jupiter✓ Correct Answer
    • C.Neptune
    • D.Earth

    Explanation: Jupiter is the largest planet by mass and volume.

11. Q11.The 'Great Red Spot' is a storm located on which planet?

    • A.Mars
    • B.Jupiter✓ Correct Answer
    • C.Saturn
    • D.Neptune

    Explanation: It is a giant anticyclonic storm on Jupiter, larger than Earth.

12. Q12.Which is the largest satellite (moon) in the solar system?

    • A.Titan
    • B.Ganymede✓ Correct Answer
    • C.Callisto
    • D.Moon

    Explanation: Ganymede (moon of Jupiter) is the largest moon, even larger than Mercury.

13. Q13.Which planet rotates fastest on its axis?

    • A.Earth
    • B.Mars
    • C.Jupiter✓ Correct Answer
    • D.Saturn

    Explanation: Jupiter has the shortest day, completing a rotation in just under 10 hours.

14. Q14.Which planet is known as the 'Lord of the Heavens'?

    • A.Jupiter✓ Correct Answer
    • B.Saturn
    • C.Uranus
    • D.Neptune

    Explanation: Jupiter is named after the king of Roman gods.

15. Q15.Which planet has the most extensive ring system?

    • A.Jupiter
    • B.Saturn✓ Correct Answer
    • C.Uranus
    • D.Neptune

    Explanation: Saturn is famous for its bright, complex system of rings.

16. Q16.Titan is the largest moon of which planet?

    • A.Jupiter
    • B.Saturn✓ Correct Answer
    • C.Uranus
    • D.Neptune

    Explanation: Titan is Saturn's largest moon and the second largest in the solar system.

17. Q17.Which planet would float on water due to low density?

    • A.Earth
    • B.Mars
    • C.Saturn✓ Correct Answer
    • D.Mercury

    Explanation: Saturn's density (0.69 g/cm³) is less than water (1 g/cm³).

18. Q18.Which planet currently has the highest number of moons (as of 2023)?

    • A.Jupiter
    • B.Saturn✓ Correct Answer
    • C.Uranus
    • D.Neptune

    Explanation: Saturn has regained the lead with 146 confirmed moons.

19. Q19.Which planet is known as the 'Lying Planet' or 'Rolling Planet'?

    • A.Uranus✓ Correct Answer
    • B.Neptune
    • C.Saturn
    • D.Mars

    Explanation: Uranus is tilted at 98 degrees, effectively spinning on its side.

20. Q20.Which planet appears green due to Methane gas?

    • A.Uranus✓ Correct Answer
    • B.Mars
    • C.Venus
    • D.Jupiter

    Explanation: Methane in Uranus's atmosphere absorbs red light, giving it a green-blue hue.