Science

Earthmen first sent a spacecraft to which planet?

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What liquid is used as a standard when measuring density?
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The Sun's mass is approximately how many times as great as Earth's?
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What metal is used to make cans?
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What does MAST stand for in medical terms?
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About how many years does it take for Pluto to go around the Sun for a complete revolution?
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Which scientific term is defined as the rate at which a wave oscillates in cycles?
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Where is the great dark spot located?
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At what temperature fahrenheit does water freeze?
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