Science

Which of these has a lens?

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What space object did some ancient cultures rely on to tell the passage of time?
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Which of these best describes how light travels?
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A hurricane with winds between 110-130 miles per hour is considered what category storm?
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What is the speed of sound called?
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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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How many days was Skylab III in space?
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In math, "pi" is equal to?
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What is the name of the spacecraft that took the first men to the moon?
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