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What was the first sound-recording device called?
Science
What was the first sound-recording device called?
Telegraph
Photograph
Phonograph
Telephone
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Which of these animals is a mammal?
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What would you use to measure the mass difference between two like objects?
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Clouds are made up of what?
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How many planets are there in the solar system?
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What metal is used for most electrical wire and cable?
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What are materials that come from the earth called?
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Which aeronautical term is a moveable surface on an aircraft which controls its motion?
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What instrument is used to look far-away objects?
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