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.
Physics Central
American Physical Society: Physics Central: Discover Homepage
Link to nine major physics topics and dig deeper into the content. Find out about the work of scientists in each field and see example physical science experiments.
Science Buddies
Science Buddies:testing Compression Waves
Here's a project for studying compression waves in different soil types. It uses a homemade wave tank for solids, with a frequency generator, amplifier, and loudspeaker as the vibration source. There are lots of interesting possibilities...
Other
The University of Salford: Sounds Amazing
This site has several lessons all about sound. It introduces sound, then covers major principles of waves and the wave equation. Each lesson has interactive activities to keep you interested, and there are even some test questions.
University of Minnesota
University of Minnesota: Applications of Waves in Your Everyday Life
This site offers a variety of everyday activities and everyday experiences in which waves or sound waves play a role.