WONDER #73: Why Is Pluto No Longer a Planet?
Question 1 of 3
Which of the following rules defining what makes a planet were not made in 2006, according to this Wonder?
- A planet must orbit the sun.
- A planet must currently support life.
- A planet must be round.
- A planet must have "cleared the neighborhood" of its orbit.
Question 2 of 3
What rule of planethood has Pluto failed to accomplish?
- A planet must orbit the sun.
- A planet must have "cleared the neighborhood" of its orbit.
- Both A and D.
- A planet must be round.
Question 3 of 3
How many dwarf planets are mentioned in this Wonder?
- 2
- 3
- 4
- 5
Check your answers online at https://wonderopolis.org/wonder/Why-Is-Pluto-No-Longer-a-Planet.