from http://science-class.net/archive/science-class/Chemistry/states.htm
These resources are generally appropriate for grades 5 - 9. In some cases they have been classified by grade level.
The groupings are general and somewhat arbitrary. As with anything in education; your milage may vary.
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More from
Mostly for Teachers
Mostly for Students
Elementary
Elementary - Middle School
Middle School
Matter Game (Scroll down & click on matter )
Middle School - HIgh School
How does thermal energy affect the state of a substance?
High School
What factors influence the pressure of a gas in a container?
For Teachers & Students
Changes of State (Edquest)
States of Matter (Queensland Science)
States of Matter (The Open Door)