Science
Which of these was one of the original universal elements?
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How do scientists refer to the direction from which the wind is blowing?
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What organelle packages and helps in secretion of substances within the cell?
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What liquid is used as a standard when measuring density?
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Which of these is defined as "part of the electromagnetic spectrum that contains visible light"?
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What is the name of an instrument that records vibrations in the Earth's crust?
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Colors other than white, black and the pure greys are known as what?
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Which form of energy can we see with the naked eye?
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