1. Energy can exists in different forms
Mechanical
Sound
Chemical
Thermal
Electromagnetic
Nuclear
Solar Energy

2. ENERGY
The ability to cause change.

3. Wave
A disturbance that transfers energy from place to place. Waves can transfer energy over distances without moving matter the entire distance.
Examples: Water Wave, Sound Wave

4. Medium: Any substance that a wave can move through.
Mechanical Wave: Waves that transfer energy through matter.

5. Transverse Wave
The direction of the wave travels perpendicular, to direction of the disturbance.

7. Longitudinal Waves
The wave travels the same direction as the disturbance.