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It doesn't take a degree in chemistry to know that water is made up of two elements: hydrogen and oxygen. Sure, you're familiar with that famous formula, but did you know that some types of water can have more oxygen than others? Use a nifty test kit to discover the amounts of oxygen in water that is sitting and running. Where do you think you'll find the most oxygen? Does sitting or running water have higher levels of oxygen?
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Fecha publicaci?n: 12.5.2016
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