These sites explain and define the three stages (or phases) of matter: gas, liquid, and solid. There is also information about a fourth phase called plasmas. Includes animations of particles, videos, illustrations, and activity ideas. There are link to eThemes resources on the properties of matter and mass and weight.
Read descriptions of the properties and the relationships of gases, liquids, solids, and plasmas. The site is mostly text with some illustrations. NOTE: The site includes ads and a link to Google searching.
Here is a science lesson and experiment on how temperature changes particle movement. The site gives an in-depth description of how to conduct the experiment as well as an assessment. NOTE: This site includes ads.
This lesson plan for grades 1-3 has in-class activities that can help kids understand matter and the different states of matter. These activities also introduce kids to the concept of molecules and molecular behavior in different states of matter.
Find out how properties of matter describe its various states. Discover the states of matter that exist on our planet and in the universe. Includes experiments with different states of matter and observing the changes as well as animated movies, lesson plans, worksheets, and online quizzes. There is a link to an eThemes on gases, liquids, and solids.