Students investigate the structure and parts of the atom, and learn about atomic mass and atomic number. They also explore the differences among solids, liquids, gases, and plasma.

[Free Registration/Login Required] Explore how heat and temperature relate to phase changes.

This site helps students construct a model of the arrangement of water molecules when present as solid, liquid or gas. Includes background information, lesson plans, links to standards and assessment ideas.

A brief explanation of determining the temperature and density at which the critical point of nuclear matter is located.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will define a mixture and understand why mixtures are different than pure substances. They will classify mixtures as homogeneous or...

Read about solids, liquids, and gases, and find out about the phases of matter.

Use this resource to learn about the three different phases of water; solid, liquid, and gas. What happens to water as it changes into a solid or gas? Includes short and easy to do activity.

Five exemplary chemistry lessons about the three states of matter complete with handouts and animations.

[Free Registration/Login Required] In this interactive you will move the red dot below each flask to observe how particles move in each different phase of water. You will need a sign-in to access this media, but it will be well worth...

Investigate the concept of water changing states.

Five chemistry lessons about phase changes between the states of mattter complete with handouts and animations.

Printable classroom-ready worksheets for a series of simple-to-implement experiments about the states of matter.

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...

Discusses the changes of state that can occur for the three different types of matter (solids, liquids, and gases) and different types of heat energy that have been defined by scientists.

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 resource discusses ways liquids can change into gases and vice versa.

Given descriptions, scenarios, or illustrations, students will distinguish between the compressibility, structure, shape, and volume of solids, liquids, and gases.

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...

At this resource discover the difference between solids, liquids, and gases. Practice what you just learned with included review questions.

Wikipedia offers a brief description of the term, "Melting point," including hyperlinked terms.

Percy Julian and Josef Pikl used the fact that melting point-the temperature at which a substance changes from a solid to a liquid-is a characteristic property of a substance to prove that the British chemist Robert Robinson could not...

Explore the different states of matter while creating glue.

Students will practice the technique of chromatography by separating a mixture of FD&C dyes. Questions related to the experiment along with the answers are available for use by the teacher.

Is it a solid or a liquid? In this activity, students will handle a mystery substance that has qualities of both a solid and a liquid while learning about phases. They will manipulate the substance, record any observations they...