Science
Which of these is considered "work"?
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Which of these was one of the original universal elements?
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What is the repeated sound when sound waves bounce off other objects called?
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How many tiles make up the outer "skin" of Spaceship Earth, in EPCOT?
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What spacecraft takes astronauts into space, orbits the Earth and can be flown more than once?
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What are materials that come from the earth called?
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What is the term given to heat and light radiated from the sun?
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What is energy from the internal heat of the Earth called?
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