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Upper Elementary Science - I
3.8 Planet Mercury - The Smallest Planet

In mythology, Mercury was a Roman God. He was the messenger for the other gods, and for this reason Mercury is often shown in pictures with winged sandals. In addition to delivering messages, he was also the protector of travelers, and merchants.

How much would you weigh on Mercury? If you moved to Mercury you would not weigh as much as you do on Earth. Not because you would lose weight on the space ship, but because Mercury is smaller, and so has less gravity. If you weigh 70 pounds on Earth, you would weigh only about 27 pounds on Mercury.

Mercury is a world of extremes. Because it is so close to the Sun, a visitor could easily cook to death. However because mercury spins so slowly it gets very cold in the night time, which means a visitor could also freeze to death. Mercury has no moons.


Directions: Answer the following questions.
Q 1: What is the diameter of this planet in miles?
3031 miles
7517 miles
4876 miles
142 miles

Q 2: How many miles away is the planet Mercury from the sun?
196 million
36 million
36
225

Q 3: Is this planet an inner or outer planet?
inner
outer

Q 4: How long does it take the planet Mercury to make one rotation on its axis?
59 hours
59 days
159 days
24 hours

Q 5: Mercury is about the size of _____.
Earth
Mars
Sun
our Moon

Q 6: Mercury is smaller, and so has _____ gravity than the planet Earth.
less
no
more

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Question 8: This question is available to subscribers only!


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