1. Unit: Sound and Light
Lesson 2 Properties of Sound
Essential Questions:
1.) What affects pitch?
2.) What affects loudness?
3.) What causes the Doppler Effect?

2. What affects pitch?
The pitch describes how high or low a sound seems.

3. Pitch depends on the frequency of the sound wave (the higher the pitch, the faster the vibration)
Low pitch
High pitch

4. What affects loudness?
Loudness describes your awareness of the energy of sound.

5. Loudness depends on the energy and intensity of the sound wave.

6. What causes the Doppler Effect?
The Doppler Effect happens when the motion of the source of the sound causes the waves to get closer or spread apart.