Science

What is the distance that light travels in a year called?

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Which inhospitable desert holds the world's richest deposits of dinosaur remains?
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About how often does Halley's Comet return?
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In math, "pi" is equal to?
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What do our bodies need from the air we breathe?
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Which of these objects would be attracted to a magnet?
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What unit of mass is equal to a thousand grams?
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In what part of the human body is the heart found?
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Which of these measurements would be different on Mars than on Earth?
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