These sites have information about atoms, atom structure, different models of atoms, elements, and the periodic table. There are also some online quizzes and a hands-on activity. There are links to eThemes resources on the properties of matter and on gases, liquids, and solids.
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.
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.