Section 1 Section 2Section 3Section 4Chapter 2
100 A substance through which a wave can travel.
100 What is a medium?
200 The part of the ear where vibrations are converted into electrical signals for the brain to interpret.
200 What is the inner ear?
300 A disturbance that transmits energy through matter or space.
300 What is a wave?
400 Sound travels as this type of wave.
400 What is a longitudinal wave?
500 As air particles are pushed closer together, they create a region of higher density and pressure known as this.
500 What is a compression?
100 The technological device that can be used to “see” sound waves is known as this.
100 What is an oscilloscope?
200 Sounds with frequencies that are lower than 20 Hz.
200 What is infrasonic?
300 Sounds with very high frequencies used to break down kidney stones.
300 What are ultrasonic sounds?
400 The frequency of a car horn appears to change as a car passes because of this.
400 What is the Doppler effect?
500 The speed of sound in air ________as the temperature decreases.
500 What is decreases?
100 When destructive interference occurs, a sound will be _____ because the amplitude is ________.
100 What is softer and decreased?
200 This occurs when compressions of one wave overlap the rarefactions of another wave.
200 What is destructive interference?
300 Constructive interference occurs when rarefactions of one wave overlap ______ of another wave.
300 What are rarefactions?
400 The wave interaction most important for echolocation is known as this.
400 What is reflection?
500 This type of wave is a result of interference in which portions of the wave are at the rest position and other portions have a large amplitude.
500 What is a standing wave?
100 Sound that includes a random mix of pitches.
100 What is noise?
200 The lowest resonant frequency of a standing wave.
200 What is the fundamental?
300 A plucked guitar string creates several of these.
300 What are standing waves?
400 If 2 sound waves interfere constructively, you will hear this.
400 What is a louder sound?
500 This is used to check the development of an unborn baby inside a mother’s body.
500 What is ultrasonography?
100 Instruments that produce sound when struck belong to this family.
100 What is percussion?
200 A car engine, a barking dog, and a radio turned to a talk show are all examples of this random mix of pitches.
200 What is noise?
300 The bending of sound waves around barriers or through openings.
300 What is diffraction?
400 This is when an object vibrating at or near a certain frequency causes a second object to vibrate.
400 What is resonance?
500 When you speak, _______ cords vibrate and create compressions and rarefactions.
500 What are vocal cords?