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Online Quiz (Worksheet A B C D)

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Upper Elementary Science - II
3.11 Outer (Dwarf) Planet Pluto

Because Pluto is so small, many scientists don't consider it a planet at all. In August 2006, the International Astronomical Union (IAU) decided that Pluto was not a planet equal to the other eight planets in our solar system, and called it a dwarf planet.

Far out in the dark is the smallest planet of our solar system, Pluto, named after the roman god of the underworld. Most of the time, Pluto is the farthest planet from the sun. Its orbit follows a strange path, though that sometimes swoops inside the orbit of Neptune-but not until the twenty third century.

Only the most powerful telescopes on the earth can see Pluto. Astronomers did not even discover this planet until 1930. In 1978, astronomers found one moon around Pluto and named it Charon, after the man in Greek mythology who took souls to the underworld. Charon is so big that some astronomers consider Charon and Pluto a double planet.


Directions: Answer the following questions.
Q 1: How many miles is this planet from the sun?
5900
5900 million
3664 million
3664

Q 2: Pluto is the _________ planet in the solar system.
largest
smallest

Q 3: What is the diameter of this planet in miles?
9,532
2,274
1,366
4,258

Q 4: Is this planet an inner or outer planet?
outer
inner

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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