Chem4kids
Chem4 Kids: Plasma
Here you can learn all about plasma. Explore what plasma is, its basic characteristics, and how plasma is created.
Other
Plasmas International: Perspectives on Plasmas
Great introduction site, overview of plasmas and plasma science with some good information and great pictures.
Other
Southwest Research Institute: The Plasma Universe
Two page introduction to the state of matter. Good site!
Other
Plasmas International: What Are Plasmas?
Good site with graphics and background on the 4th state of matter.
University of Alaska
Alaska Science Forum: Plasma: The Fourth State of Matter
Good discussion on the conditions and natural existence of plasmas.
Other
Coalition for Plasma Science: A Teacher's Guide to Plasma Science Resources
These resources have been collated to National Science Standards, and include lesson planning ideas.
Other
Plasmacoalition: What Is Plasma
This site, which is provided for by the Coalition for Plasma Science, gives a nice introduction to the 4th state of matter.
Other
Plasmacoalition: The First State of Matter
This site from the Coalition for Plasma Science provides a short, interesting paper outlining the relative importance or precedence of plasma compared to the other states of matter.
Other
Physics and Astronomy Online: Plasma?
Physics and Astronomy Online offers an interesting Q & A about the conditions of plasmas as they occur in general and in the everyday world.