How much do you know about Jupiter? Test your knowledge by taking the Jupiter quiz. All you need to do is click on an answer for each question. Have fun!

1: What is Jupiter?
a) A star
b) An asteroid
c) A planet

3: How long is a year on Jupiter?
a) Nearly 12 Earth years
b) About 22 Earth days
c) Just under one Earth year

5: What is the Great Red Spot?
a) A giant storm
b) A large, erupting volcano
c) A huge, dusty desert

7: How long does it take Jupiter to rotate, or spin around, once?
a) 3,000 Earth days
b) Nearly 10 Earth hours
c) 2 Earth hours

9: Who or what is Jupiter named after?
a) A car that was produced in 1933
b) The king of the Roman gods
c) The Greek god of the sky

11: How many astronauts have flown to Jupiter?
a) 10
b) 5
c) 0

13: How were the craters on Jupiter’s moon Callisto formed?
a) By space probes crashing into the moon
b) By asteroids and other rocky space objects hitting the moon
c) By eruptions of frozen water and gases from within the moon

15: Which statement is false?
a) Jupiter’s moon Ganymede is bigger than the
planet Mercury.
b) Jupiter has four rings circling it.
c) Jupiter’s four largest moons are shaped like
lumpy potatoes.

17: Which statement is true?
a) Jupiter is larger than Earth but smaller than the Sun.
b) Jupiter is larger than the Sun.
c) Jupiter is about the same size as Earth.

19: How old is the Great Red Spot storm?
a) At least 400 years old
b) Four years old
c) 40 years old

2: Which statement is true?
a) Jupiter is the closest planet to the Sun.
b) Jupiter is the farthest planet from the Sun.
c) Jupiter is the fifth planet from the Sun.

4: Which statement is true?
a) Jupiter is rocky and covered with mountains.
b) Jupiter does not have a solid surface.
c) Jupiter is covered with rivers and forests.

6: Which of these statements is false?
a) Jupiter’s atmosphere is made of water.
b) Scientists think that the center of Jupiter may be a solid,
rocky ball.
c) Jupiter’s atmosphere is made up of gases and clouds.

8: How many moons does Jupiter have?
a) At least 67
b) 0
c) 5

10: Which of these statements is false?
a) Jupiter’s moon Io is home to more than 400 volcanoes.
b) The surface of Jupiter’s moon Europa is covered with
a frozen ocean.
c) Jupiter’s moon Europa is the hottest object in the
solar system.

12: Which of these statements is false?
a) Galileo is a space probe that orbited Jupiter for nearly
eight years.
b) Galileo is a space probe that sent a smaller probe into
Jupiter’s atmosphere.
c) Juno is the name of one of Jupiter’s moons.

14: Which statement is true?
a) You need a telescope to see Jupiter in the sky.
b) It is possible to see Jupiter in the sky without a telescope.
c) Jupiter was first discovered in 1927.

16: What was the name of the first spacecraft to fly past Jupiter?
a) Pioneer 10
b) Zeus 13
c) Titanic 2

18: What causes Jupiter’s clouds to swirl in colorful patterns?
a) Huge fans built by aliens
b) Gases in Jupiter’s atmosphere
c) Winds caused by space probes flying through
Jupiter’s atmosphere

20: What will the space probe Juno do?
a) Allow scientists to see beneath Jupiter’s clouds
b) Carry astronauts to Jupiter
c) Land on each of Jupiter’s moons

Click to download a pdf
version of these questions.