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Use demonstrations to enlighten learners on oxygen's role in combustion. Use potatoes and hydrogen peroxide to increase oxygen concentration in a jar, then stick a glowing splint and a burning wad of steel wool into the newly formed atmosphere. Beginner and intermediate versions of an observation worksheet are included. Use the demonstrations when teaching about the components of the atmosphere or the properties of oxygen. If learners have developed lab skills, print the directions out so that they can perform the exercises themselves.
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