1. Waves, Sound, and Light Chapter 1

2. Bell Work 11/2/09 1.Name two ways you can apply force to a soccer ball. 2.Name two ways the force you apply can change the motion of the soccer ball.

3. W, S, L - 1.1 Vocab Wave – a disturbance that transfers energy from one place to another Medium – any substance that a wave moves through Mechanical wave – waves that transfer energy through matter

4. 1.1 Vocab Cont. Transverse wave – a wave that travels in a perpendicular direction to its disturbance Longitudinal wave – a wave travels in the same direction as its disturbance

5. Bell Work 11/3/09 Please answer these questions on the pink bell work paper. 1.What is a mechanical wave? 2.What is a transverse wave? 3.What is a longitudinal wave?

6. Bell Work 11/4/09 1.Describe how forces start waves. 2.Does water moving through a hose qualify as a wave? Explain why or why not.

7. 1.2 Vocab Crest – the highest point, or peak, of a wave Trough – the lowest point, or valley, of a wave

8. 1.2 Vocab Continued Amplitude – the distance a medium moves above or below its trough or crest Wavelength – the distance from one crest or trough to the next Frequency – the number of waves passing a fixed point in a certain amount of time

9. Bell work 11/5/09 Make a simple diagram of a wave, labeling amplitude, frequency, and wavelength.

10. Bell Work 11/6/09 How could you measure each of these things? What problems might you encounter in doing so? 1.Width of a door opening 2.Volume of liquid 3.Length of time

11. Bell Work 11/9/09 1.What is the difference between a transverse wave and a longitudinal wave? 2.Draw a picture to explain each.

12. Bell Work 11/10/09 1.What is a medium? 2.Give 2 examples of mediums.

13. Bell Work 11/12/09 1.Explain how to make a wave with a rope. 2.Explain how to make a wave with a slinky.

14. Bell Work 11/13/09 1.When you look in a mirror what are you seeing? 2.What are some examples of waves?

15. Notes 1.3 Reflection – the bouncing back of a wave after it strikes a barrier

16. Reflection Any type of wave can be reflected. We will look at the reflection of Sound, Water and Light Waves. Reflection best occurs from flat, hard surfaces. After reflection, a wave has the same speed, frequency and wavelength, it is only the direction of the wave that has changed.Sound Water speedfrequencywavelength

17. Refraction – the bending of a wave as it enters a new medium at an angle other than 90 degrees

18. Refraction Any type of wave can be refracted, which means a change of direction. We will look at the refraction of Water Waves, Light Waves and Waves from Earthquakes. Water WavesLight WavesWaves from Earthquakes Refraction can occur when the speed of a wave changes, as it moves from one environment to another. After refraction, the wave has the same frequency but a different speed, wavelength and direction.frequencyspeedwavelength When a wave enters a new environment, its change in speed will also change its wavelength (see the definition of wavelength).wavelength

19. Diffraction – the spreading out of waves through an opening or around the edge of an obstacle

20. Interference – the meeting and combining of waves

21. Diffraction Any type of wave can be diffracted. A diffracted wave will "spread out". Diffraction occurs when the wavelength of a wave is of a similar size to an obstacle or a gap in a barrier. After diffraction, a wave will have the same speed, frequency and wavelength.speedfrequencywavelength

22. Bell Work 11/16/09 1.What is reflection? 2.Give an example of reflection. 3.What is refraction? 4.Give an example of refraction.

23. Bell Work 11/17/09 1.What is diffraction? 2.Give an example of diffraction. 3.What is interference? 4.Give an example of interference.

24. Bell Work 11/18/09 1.What is an echo an example of? 2.What do all waves travel through? 3.What is the amplitude measuring?