Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

In this animated object, learners examine the chemistry behind table salt.