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