Water can exist in three different phases. This still collage produced for Teachers' Domain features examples of water in liquid, solid, and gas states.

Teachers can find an interactive lesson plan for introducing the three states of matter to the early elementary student using items that they are familiar with. This also includes gathering data and filling in a table, an important part...

Through an instructional video, games, and activities, students explore three types of change matter makes: physical change, in which only the shape of the matter changes; physical phase change in which matter changes to a different form...

The question: "What would the triple point of water truly look like?" is discussed and explained. The phases of matter are described.

This lesson will introduce a phase change diagram, and show how a substance changes from one phase to another. It is 3 of 3 in the series titled "Phase Changes."

This lesson will introduce a phase change diagram, and show how a substance changes from one phase to another. It is 2 of 3 in the series titled "Phase Changes."

This lesson will introduce the phase changes that occur at the boiling, freezing, and melting points. It is 2 of 4 in the series titled "Boiling, Freezing, Melting Point."

This lesson will introduce the phase changes that occur at the boiling, freezing, and melting points. It is 4 of 4 in the series titled "Boiling, Freezing, Melting Point."

This lesson will introduce the phase changes that occur at the boiling, freezing, and melting points. It is 1 of 4 in the series titled "Boiling, Freezing, Melting Point."

[Free Registration/Login Required] This flipchart describes the 3 states of matter and how materials can change through heating and cooling.

Help the Phantom choose a material and observe the changes at different temperatures in the molecule chamber. What happens to the elements or molecules as the temperature changes?

A very descriptive site that allows students to understand the different states of matter at the atomic level. Also discusses the process of phase changes and displays phase change graphs. Thermochemistry is also touched upon for high...

[Free Registration/Login Required] An informational text about water as a liquid, a solid, and a gas. A question sheet is available to help students build skills in reading comprehension.

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

Explore the concept of matter in this Spanish-language encyclopedia entry. This site features the properties of matter, the Law of Conservation of Matter, and other important features of matter.

A discussion of the variety of forces which hold molecules together. The relative strengths of these forces for the various states of matter is discussed. The effect of such forces on the boiling points and other phase change...

In this activity, students construct models of molecules using marshmallows and gum drops.

Nice set of problems dealing with the concept of a heating curve. Learners can click on the question and get immediate feedback on their answer.

This lesson focuses on Matter including the three states of matter, the energy that it takes to change the state of matter, and experiments for children to conduct. Students can choose to have any paragraph read to them.

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 video and a short quiz on the periodic table of elements and how it is organized.

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

A very complete list of terms that are important to the study of gases. This resource is a web archive.

Explore the different states of matter while creating glue.