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Activity
Scholastic

Scholastic: Dirtmeister's Science Lab: Good Vibrations

For Teachers 6th - 8th
An experiment that explores the relationship between vibrations and pitch. This site includes web links, a challenge question, and notes to the teacher.
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Interactive
Other

Manchester Museum of Science and Industry: Sound 101: Bad Vibes

For Students 9th - 10th
Learn about sounds and rate sounds from just "bad" to "really horrible." Then read an explanation about acoustics and the reason why people find some sounds to be worse than others. Also learn to mix your own sounds.
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Lesson Plan
Scholastic

Scholastic Instructor: Science of Sound

For Teachers 9th - 10th
This resource is for teachers who are looking for information, activities, experiments, and more pertaining to the science of sound.