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In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.

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.

In this activity, learners examine the parts of a thermometer. After placing a thermometer in hot and cold water, learners look at molecular model animations of the liquid in a thermometer.

"What's in the Water" lets participants use tools to solve the mystery- what chemicals and compounds are in a sample of water?