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The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

Learners work in groups to construct bridges using stale marshmallows and toothpicks.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.