| 1. |
The composition of Pluto is not yet known. Sean estimates that Pluto is a mixture of twenty-nine percent rock and the rest of the planet is made of water. What percent of Pluto does Sean estimate to be water? |
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| 2. |
It takes Mars six hundred eighty-six and two tenths Earth days to orbit the sun. How much quicker is Earth's revolution? |
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| 3. |
It takes Mercury fifty-eight and six tenths Earth days for a complete rotation and eighty-eight Earth days for a complete revolution. How does Mercury's time for a complete rotation compare to that of Earth's? |
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| 4. |
Uranus is two thousand, eight hundred seventy-five million kilometers from the sun, and Venus is one hundred eight million kilometers from the sun. How much further from the sun is Venus? |
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| 5. |
Destiny is an astronomer. She estimated that during Mercury's day, the planet reached a high temperature of seven hundred eighty-one degrees Fahrenheit. Destiny estimated that during the night, the temperature dropped one thousand, sixty-seven degrees Fahrenheit from the high temperature. What was Destiny's estimate for the low temperature? |
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| 6. |
Pluto's radius is about 715 miles. Neptune's diameter is about 15,270 miles. The diameter of Pluto is how much smaller than Neptune's diameter? |
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