1. Learning Objectives: 1. Identify the different parts of a sound wave 2. Describe the relationship between wave amplitude and intensity + wave frequency and pitch

2.  A sound can be…

3.  Scientist use microphones to detect sounds.  If a microphone is attached to a oscilloscope, you can see a representation of the sound wave.  By looking at the wave (trace) on the oscilloscope screen, we can describe what the sound is like.

4.  The height of a wave is called its amplitude. (a high amplitude is a loud noise)  The number of complete waves (cycles) is called frequency (measured in hertz or Hz)  The distance between the same point on 2 cycles is called a wavelength. (waves with higher frequencies have shorter wavelengths)

5.  Draw a wave with a high frequency and short wavelength + label  Draw a wave with a low frequency and low wave length + label  Draw a wave with a high amplitude, high frequency and short wavelength

6.  If the wave has a high amplitude it is going to be loud  If the wave has a high frequency it is going to be high pitch

7.  Video

8.  Read pages 164- 165 in the book and then answer questions 1-7  Once you have finished this I will project an extension on the board.

9.  Label the sound wave  If a wave is loud it must have a high …..  A high pitch sound will have a high ….