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In this activity, learners build a "pneumatic trough," a laboratory apparatus used for collecting pure gas samples over water.

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

Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

In this activity, learners add dilute bleach solution to water that has been dyed with yellow, blue, and green food color.