8th+Grade+Science

xkcd.com
 * Physical science demos**
 * []**

http://phet.colorado.edu/
 * Online interactives:**

Sound and light webquest: [] Wave parts: [] Sound and light waves: [] Light and sound wave lessons: [] Comparison of sound and light waves (table): [] Physics Zone lessons: [] Tacoma Narrows bridge: [] physical science PBLs: []
 * Waves**