1. Wave Notes

2. What types of waves can you think of?

3. What is a wave? Wave - traveling disturbance that carries energy from one place to another Waves carry energy, NOT matter!

4. Where Do Waves Get Energy? Vibration - movement that follows the same path repeatedly An object that is vibrating is moving, and if it is moving it has energy. The movement of energy from a vibrating source outward is a wave.

5. The matter, or substance, through which a wave is transmitted is called a medium. Water is a medium for ocean waves. Air is a medium for sound waves.

6. The basic properties of waves are amplitude, wavelength, frequency, and speed. Properties of Waves

7. Amplitude - the distance from the rest position to the crest or trough of a wave

8. Wavelength - distance between one point on a wave and the nearest point just like it

9. Frequency - number of full wavelengths that pass by a point each second

10. *The unit used to measure wave frequency is called the Hertz(Hz) *One hertz is equal to one wave, or cycle, per second: 1 Hz = 1 wave/sec.

11. Speed - distance per time that a given wave travels. Waves travel at different speeds in different mediums! Speed =Frequency x Wavelength

12. CLICK above to watch a BrainPop on WAVES!

14. Types of Waves 1. Mechanical Waves - require a medium Transverse Longitudinal/Compressional 2. Electromagnetic Waves - can travel through matter and empty space Transverse

15. Transverse Wave causes particles in matter to move back and forth at right angles to the direction in which the wave travels CLICK the Slinky to watch a transverse wave.

16. ·high points are called crests ·low points are called troughs Please draw a picture of this in your notes. Label the crests and trough.

17. Longitudinal or Compressional Wave causes particles in matter to move back and forth along the same direction in which it travels CLICK below to watch a compressional wave.

18. Compressions - coils are squeezed together Rarefactions - coils are spread apart COMPRESSION RAREFACTION DRAW & LABEL IN NOTES

19. Surface Waves consists of a combination of transverse and longitudinal waves and occurs at the surface between two different mediums Surface waves occur at the surface between two different mediums – water and air.

20. Electromagnetic Waves transverse wave that contain electric and magnetic parts that vibrate perpendicular to the direction that the wave travels