Read how solids and liquids respond to thermal expansion and learn how to calculate thermal expansion. Formulas and examples are provided.

Kid's learn about the science of states of matter. Solids, liquids, gases, and even plasma.

Learn how to interpret a phase diagram, explain Dalton's Law, and describe the state of equilibrium between a liquid and a gas, a liquid and a solid, and a gas and a solid. This resource contains in-depth explanations and multiple...

Join a group of middle-school students on a visit to a laboratory at the Massachusetts Institute of Technology, where they experiment with "mystery mud" and learn about the relationships between magnetism, particle motion, and changes in...

Colorful site provides a brief summary as well as engaging pictures of the three states of matter: solid, liquid and gas.

Educational resource invites users to understand the properties of water by first examining what water is and how we use it and then leads users to further information on the three states that water can exist.

A series of interactive applets use scientific models to teach some basic concepts of matter, including states of matter and physical and chemical changes.