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Notaciona ciientifica
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Notaciona ciientifica
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Lool
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Como reconocer un cambio qqqquímico qqq
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La piel de los cuerpos
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La piel de los cuerpos
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Bolsa de papel y plastico
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El mejor pañal
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Polimero
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La quimica
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Crees que pase la luz del sol
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Instrumento y unidad de medida
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Los alquimistas
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Sustancia ó cuerpo
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Medicina azteca
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