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...

Learn about matter, its three states, changes of state, how matter behaves, and physical and chemical changes in matter.

A comprehensive lesson plan site that contains a number of activities to aid in teaching about the states and properties of matter and the difference between a physical and chemical change.

What causes frost to form on the outside of a cold container? In this activity, students will see that the liquid water can change state again and freeze to become ice.

An explanation about the process of evaporation and the conditions needed to complete this process.

This site provides a lesson plan using candy making to demonstrate physical and chemical changes in matter. Includes directions to make caramel and rock candy.

The Beatles' first visit to the United States was in 1964. Clever publicity agents arranged a meeting for the band with Cassius Clay. He was training for the bout that would make him heavyweight boxing champion. The result was a...

Our pipes leak, air drafts push through our windows and walls, light bulbs create more heat than light, and every appliance we have stays plugged in all day long. Of course its our parents who pay the bills, so it doesn't matter. This is...