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What was the first sound-recording device called?
Science
What was the first sound-recording device called?
Telephone
Phonograph
Telegraph
Photograph
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Which of these things should you do during a thunderstorm?
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Which sea is not found on the earth's moon?
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What word is the definition of 100,000 BTUs?
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When were the first world climate maps charted?
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The Horsehead Nebula can be found in what constellation?
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Which of these is a scientific definition for the term "matter"?
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How often does sunspot activity reach its lowest point?
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Which person is known for establishing the laws of motion and gravity?
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