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Sound Waves
- 1. 1. A waveis a disturbance that carries through matter or empty space. A. matter B. particles C. energy D. a medium E. water 2. Electromagnetic waves . A. are transverse waves B. require a medium C. are mechanical waves D. are longitudinal waves E. are tortional 3. Waves that require or travel through a medium are called . A. longitudinal waves B. transverse waves C. mechanical waves D. tortional waves E. all of the above 4. For which type of waves do particles in the medium vibrate perpendicular to the direction in which the wave is traveling? A. transverse waves B. longitudinal waves C. P waves D. all of the above E. None of the above
- 2. ReviewReview Mechanical waves Electromagnetic waves Transverse waves Longitudinal waves Characteristics of waves
- 3. SoundSound Is alongitudinal wave Needs a medium to travel through The source of a sound wave vibrates rapidly
- 4. SoundSound This causes pressure vibrations Which causes air molecules to vibrate
- 5. SoundSound Air moleculesbunch together in some places Compressions Spread out at other places Rarefactions
- 7. PitchPitch How highor how low a sound is Not how loud Depends on the frequency Faster the frequency, the higher the pitch
- 8. PitchPitch Low pitch High pitch Same amplitude, different frequency
- 9. LoudnessLoudness Depends onthe amplitude Higher amplitude, louder sound
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- 11. EchoEcho Sound wavesthat bounce off a surface Sound will reflect off hard surfaces They will be absorbed by soft surfaces
- 12. ResonanceResonance When twoobjects naturally vibrate at the same frequency