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- 2. Question What is a wave?
- 3. Answer A wave is a disturbance that transfers energy from place to place.
- 4. Question How does amplitude affect the loudness of a sound?
- 5. Answer The greater the amplitude, the louder the sound.
- 6. Question What type of wave does sound travel as? Describe it.
- 7. Answer A longitudinal wave is a wave is a wave where the medium moves parallel to the wave’s direction.
- 8. Question What is the formula for Speed?
- 9. Answer Speed = Wavelength x Frequency
- 10. Question Why are sound waves often depicted as transverse waves instead of longitudinal waves?
- 11. Answer It is often harder to draw longitudinal waves. Therefore, We represent sound waves using transverse waves. The crests of a transverse wave represent the compressions of a longitudinal wave. The troughs represent the rarefactions.
- 13. Answer Vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.
- 14. Question What is a reflection?
- 15. Answer A reflection, also called an echo, is when a sound wave hits a surface and bounces back.
- 16. Question What is a diffraction?
- 17. Answer Diffraction is when sound waves diffract, or bend around corners. This is why you can sometimes hear people talking through doors.
- 19. Answer Interference is when sound waves meet and interact with each other.
- 20. Question What does the speed of sound depend upon?
- 21. Answer It depends on elasticity, density, and temperature of the medium the sound travels through.
- 23. AnswerLoudness is how you perceive the energy of a sound. Loudness depends on the amount of energy it takes to make the sound and the distance from the source of the sound.
- 25. Answer Pitch is how high or low a sound is. Pitch depends upon the frequency of a wave.
- 26. Question Describe intensity and how it affects loudness.
- 27. Answer Intensity is the amount of energy a sound wave carries per second through a unit area. Because the sound has more area to cover as it moves away from its source, the loudness decreases as the sound moves away from its source.
- 28. Question What is the approximate loudness of a jet plane at takeoff?
- 29. Answer 120 – 160 decibels
- 30. Question The amount of energy in a sound wave doesn’t affect pitch. If this is true, then why does pitch sound louder when the pitch increases?
- 31. AnswerIt does not affect pitch. Pitch depends on frequency. However, if you increase the pitch to a very high note, then it may seem louder because human ears are more sensitive to higher pitches.
- 33. Answer Music is a set of notes that combine in patterns that sound pleasing.
- 34. Question What are the three musical instrument groups?
- 35. Answer Wind, strings, and percussion
- 36. Question What creates a chord?
- 37. Answer A fundamental tone and its overtones
- 39. Answer Sound quality is the blending of musical instruments’ fundamental tones with their overtones.
- 40. Question What is the song that is played during the presentation? Who wrote it?
- 41. Answer “Little Lion Man” by Mumford and Sons
- 42. Question Fill in the blank. ______ is the study of how sounds interact with each other and the environment.
- 43. Answer Acoustics
- 45. AnswerStanding waves are waves that appear to stand in one place, even though it is really two waves interfering as they pass through each other.
- 46. QuestionThis man is Sheldon Cooper. He is dressed up in his Halloween costume. What is he dressed up as?
- 47. Answer He’s the Doppler effect!
- 48. Question What are nodes and antinodes?
- 49. AnswerNodes are the points of zero amplitude on a standing wave. Antinodes are the points of maximum amplitude on a standing wave.
- 50. Question Who was the first person to break the sound barrier?