Learners study the effect that pressure has on boiling temperatures. Once a liquid has reached a full boil, additional heat does not raise the liquid’s temperature; however, pressure can vary the boiling point of a liquid. A brief quiz completes the activity.

In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.

Learners examine a table containing the names of common cations and anions. They then check their knowledge by answering a series of questions.

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