Welcome to the module Sound and Magnetism.

Things to note!
1. That sound is a form of energy and it is produced by vibrating particles. 
2. That sound transmission requires a medium and that echoes are reflected sound. 
3. How the ear detects sound vibrations.  
4. How very loud sounds can cause hearing damage. 
5. That the speed of sound is less than the speed of light. 
6. Understand attraction and repulsion between magnets. 
7. That the earth is a magnetic field and be able to locate north and south. 
8. That magnetism is a form of energy.