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Hot and Cold
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In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.
Glow Fast, Glow Slow: Alter the Rate of a Reaction!
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Learners investigate one factor affecting reaction rates: temperature. In a darkened room, two identical lightsticks are placed in water -- one in hot water and one in cold water.
Change in Temperature: Endothermic Reaction
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Learners investigate signs of a chemical reaction when they mix vinegar and baking soda. In addition to a gas being produced, learners also notice the temperature decreases.
Matter of Degree
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In two separate bags, learners mix water with Epsom salts and detergent.