1. Starter What does ocean waves, sound, and light have in common? List three facts about each topic tht you already know.

2. Waves Day 35

3. What are waves? A wave is a disturbance that travels through a medium from one location to another location. Some examples; Light sound waves ocean waves

4. What is a medium? A medium is a substance or material that carries the wave. The types of mediums: Solid Liquid Gas

5. Types of Waves Mechanical There are two types Transverse Compressional Needs a medium to travel through Can’t travel through a vacuum Electromagnetic Does not need a medium Can travel through a vacuum

6. Types of Mechanical Waves Transverse A wave in which particles of the medium move in a direction perpendicular to the wave Compressional A wave in which the particles of the medium move in a direction parallel to the wave

7. Mechanical Waves

8. Longitudinal/Compressional Wave

9. Transverse or Longitudinal Waves Directions: Draw the wave and Classify as transverse or longitudinal. b. a. c. d. e.

10. Properties of Transverse Waves Amplitude The height of the wave, measured in meters Frequency the number of complete waves that pass a point in one second, measured in Hertz (Hz) Period the time it takes for one complete wave to pass a given point, measured in seconds Wavelength the distance between adjacent crests, measured in meters Wave speed or Velocity of a Wave the horizontal speed of a point on a wave as it propagates, measured in meters / second

11. Properties of Compressional Waves Compression= an area where the particles in a medium are spaced closed together Rarefaction= an area where the particles in a medium are spread out

12. Wave This is a cycle. Many cycles makes waves. Number of Cycles determine the Frequency. =

13. Directions: Count the number of cycles for each wave.

14. Frequency Wavelength determines the frequency of a wave. Short wavelength Long wavelength (High Frequency) (Low Frequency)

15. Directions: Rank the following waves from high frequency to low frequency. b. a. c. d.e.f. g.

16. Amplitude Directions: Rank from highest amplitude to lowest amplitude. a. b. c.

17. Review Directions: Draw the following waves and label the parts using the following terms amplitude, crest, wavelength, and trough. a. b. c. d.

18. Wave Speed Left Side the horizontal speed of a point on a wave as it propagates W speed =λ*ƒ Right Side Measurement/ Variable Units W speed m/s Frequency (ƒ)Hertz= Hz Wavelength (λ)meters = m W speed λ ƒ

19. Exit Slip Directions: As a group of four, Draw a KWFL on poster paper and Answer the following questions. 1. How fast is a 60Hz, 1.5m wave traveling? 2. If the speed of a wave is 1500 meters per second, and its frequency is 200 Hz, what is its wavelength? 3. If the speed of a wave is 3000 m/s, and its wavelength is 1.5 m, what is its frequency? 4. What is the wavelength of a 4650 m/s wave with a frequency of 75 Hz?