Distinguish between pitch and volume SPI 0307.11.3

Links verified 12/27/2014

1. Changing Sounds - an interactive site from the BBC that allows students to investigate factors affecting sound. A quiz is also available.
2. A cup of sound - In this activity, you will investigate variables which affect the pitch of the sound
   produced by a simple noise maker made from a variety of materials.
3. Explore amplitude, frequency and wavelength - explore changes in these three variables
4. Virtual oscilloscope - change the variables to see the difference in pitch and volume

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