"How Pluto Stopped Being a Planet"

Front

What is the main idea of the article "How Pluto Stopped Being a Planet"?

Back

A group of astronomers decided that Pluto is a dwarf planet.

Front

Which statement from the text BEST supports the main idea of the article? Options: "For decades, people believed our solar system had nine planets...", "And it's true that Pluto is small compared with the planets.", "In August 2006, astronomers came up with a new definition of planet.", "It has to be massive enough for its own gravity to pull it into the shape of a ball."

Back

"In August 2006, astronomers came up with a new definition of planet."

Front

Which of these is MOST CLEARLY a key detail of the passage?

• "And it's true that Pluto is small compared with the planets."
• "If Earth were the size of a basketball, Pluto would be the size of a golf ball."
• "It hasn't cleared its neighborhood the way the planets have."
• "Not all astronomers accept the change to Pluto's status."

Back

"And it's true that Pluto is small compared with the planets."

Front

"dwarf"

Back

small

Front

Why did the author MOST LIKELY write this article?

Back

To provide information about why Pluto is no longer considered a planet.

Front

Which sentence BEST summarizes the article "How Pluto Stopped Being a Planet"?

Back

Pluto is now a "dwarf planet" because it does not meet the three conditions to be a planet.