Explains what the critical point in a phase change is and ways that a transition from a liquid to a gas can take place. Students investigate the concepts using a Java simulation.

This tutorial helps students understand the Kinetic Theory, which explains the effects of temperature and pressure on matter as it goes through phase changes.

This lesson will explain how a phase diagram graphically represents phase changes. . It is 2 of 3 in the series titled "Phase Diagrams."

Observe what happens when a solid substance is heated in this animation. Explore heating curves as substances experience a phase change.

This site from Cornell University provides great information on the different phases of the moon. As the Moon moves in its orbit around the Sun, our view of the side illuminated by the Sun changes. Furthermore, the rising and setting...

An animation reviewing over the properties of phase diagrams.

Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time. Relate the...

An exhaustive set of "lecture notes" on various topics in thermal physics (including thermal expansion). Explanations are well done and more interesting than most. Includes both a mathematical and conceptual treatment of topics. Humor,...

Take on this self-guided advanced level e-text, and learn about the chemical and physical structure of liquids and solids.