Canada Science and Technology Museum
Canada Science and Technology Museum: Background Information for Sound
Sound! How does it work? All you need to know about it is found here through a series of Q&As. Educators will find useful lesson plans.
Scholastic
Scholastic: Dirtmeister's Science Lab: Good Vibrations
An experiment that explores the relationship between vibrations and pitch. This site includes web links, a challenge question, and notes to the teacher.