Science

What tool uses a magnetic needle that points north?

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The Horsehead Nebula can be found in what constellation?
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Which Apollo mission were Edward White and Gus Grissom selected for?
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What does Earth's tilted axis mainly affect?
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What is condensed water falling from the atmosphere called?
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Which of the following books has Carl Sagan not authored?
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What are the first four planets in the solar system called?
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A covering of ice crystals on the ground is known as what?
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How many planets are there in the solar system?
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