Quiz · Why Pluto Lost Its Status

Question 1What is the main purpose of this passage?

To describe a spacecraft's journey to Pluto To explain why Pluto was reclassified as a dwarf planet To argue that the solar system has ten planets To introduce the discovery of the planet Eris

Question 2How long does sunlight need to reach Pluto?

More than five hours About twenty minutes Less than one hour More than five days

Question 3What problem pushed scientists to create a new definition of the word planet?

Pluto's orbit was changing in a dangerous way A spacecraft found cities on the surface of Pluto Schoolbooks contained too many errors about planets Astronomers kept finding other icy worlds of similar size