Pluto (last planet) discovered by Clyde Tombaugh
  • 1. When was Pluto discovered by Clyde Tombaugh?
A) 1930
B) 1940
C) 1910
D) 1920
  • 2. Which year was Pluto reclassified from a planet to a dwarf planet?
A) 1999
B) 2006
C) 2010
D) 2015
  • 3. How many known moons does Pluto have?
A) 2
B) 5
C) 3
D) 7
  • 4. Which spacecraft conducted a flyby of Pluto in 2015?
A) Juno
B) Voyager 2
C) New Horizons
D) Cassini
  • 5. Who proposed the name 'Pluto' for the newly discovered planet?
A) Galileo Galilei
B) Isaac Newton
C) Venetia Burney
D) Johannes Kepler
  • 6. What is the rotational period of Pluto in Earth days?
A) 4.5 days
B) 2.1 days
C) 6.4 days
D) 9.8 days
  • 7. In which zodiac sign was Pluto in at the time of its discovery in 1930?
A) Gemini
B) Virgo
C) Cancer
D) Leo
  • 8. What is the largest moon of Pluto?
A) Styx
B) Hydra
C) Charon
D) Nix
  • 9. What is the composition of Pluto's atmosphere?
A) Hydrogen, nitrogen, sulfur dioxide
B) Nitrogen, methane, carbon monoxide
C) Oxygen, helium, argon
D) Carbon dioxide, water vapor, krypton
  • 10. Which scientist made predictions of a ninth planet beyond Neptune, leading to the discovery of Pluto?
A) Edwin Hubble
B) Percival Lowell
C) Carl Sagan
D) Edmund Halley
  • 11. What is the name of the region on Pluto where large amounts of nitrogen ice are found?
A) Valles Marineris
B) Sputnik Planitia
C) Mauna Kea
D) Olympus Mons
  • 12. Who discovered the first moon of Pluto, Charon?
A) James Christy
B) Robert Burney
C) Audouin Dollfus
D) Clay Sherrod
  • 13. Who discovered Pluto?
A) Clyde Tombaugh
B) Albert Einstein
C) Isaac Newton
D) Galileo Galilei
  • 14. What is the classification of Pluto?
A) Gas giant
B) Dwarf planet
C) Ice giant
D) Terrestrial planet
  • 15. What is the orbital period of Pluto?
A) 248 years
B) 365 days
C) 4 years
D) 92 years
  • 16. What is the order of Pluto's discovery in terms of its position in the solar system?
A) 9th
B) 10th
C) 8th
D) 7th
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