[Free Registration/Login may be required to access all resource tools.] Definition of a change of state and the physical processes that cause it.

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

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 lab serves as a short introduction to both changes in state and air pressure/the gas laws. The students will heat a small amount of water in an aluminum can. They will then invert it in a bucket of cold water and crush the can using...

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

[Free Registration/Login may be required to access all resource tools.] Definition of a change of state and the physical processes that cause it.

Learners conduct a hands-on investigation to determine how matter, changing state, effects the property of weight. Students will collect data and graph their results. Resources include step by step instructions, a data worksheet, videos...

In this chemistry lab, students will investigate, observe, and describe a variety of chemical and physical changes in matter. They will understand that this is part of everyday life.

This activity reviews of states of matter, then relates them to atomic movement as it is affected by attractions between atoms and the addition of energy. Latent heat and evaporative cooling are also topics covered. Multiple-choice and...

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...

[Free Registration/Login may be required to access all resource tools.] In this online tutorial, students will begin to understand a substance according to its physical properties. Learn to distinguish between extensive and intensive...

In this lesson, students will investigate how different materials changed when heated or cooled. The process in developing the investigation will be inquiry based. Students will have the liberty in choosing the materials and devising how...

Discover the concept that energy transfer and molecular motion cause the change in state from a solid to a liquid. Also compare state changes of water to the state changes of other substances.

Matter changes both physically and chemically on a fairly regular basis. Through these activities students will challenge their understanding of the changes that may take place with different types of matter.

Students will look at what happens to different types of matter when they have a change of state.

A released question from the Trends in International Mathematics and Science Study (TIMSS) assessment about change of states of matter. Also included is a scoring guide for the released question.

With an overview of the various properties of the states of matter, this 18 page pdf file provides a series of topics related to liquids including special physical properties of liquids, changes of state, and more.

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

Discover how freezing works, when the change of state moves from liquid to solid.

Students will use water and cornstarch to make a mystery matter, and then discuss what happens when different energy is applied.

Four activities for reviewing vocabulary and definitions related to changes in states of matter.

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 interactive simulation will heat, cool and compress atoms and molecules. Watch as they change between solid, liquid and gas phases. Recognize that different substances have different properties which will affect the temperatures for...

Using simulations observe what solids, liquids, and gases look like at the atomic scale. After observing the different states of matter at their atomic level, students will be able to conclude about the forces and attractions that exist...