Slide 1 / 39 Directions: Select/State the answer that best completes the statement or answers the question. Show work when appropriate. Slide 2 / 39 1 If water is undisturbed and there is no wave observed, it can be said that the water is in a (n) A undisturbed/rest position B Doppler effect C destructive interference D crest Slide 3 / 39 2 When there is a disturbance in a medium and a wave is created, the particles in that medium move away from their rest position. After this occurs, what do the particles do? A They continue to move away and never return B They bounce back and return to their rest postion C They stay frozen in space D They disappear
Slide 4 / 39 3 How do a "pulse" and a "wave" compare? Students type their answers here Slide 5 / 39 4 A medium can be any A solid B liquid C gas D All of the above Slide 6 / 39 5 The particles in a transverse wave vibrate at right angles to the direction of energy movement. A True B False
Slide 7 / 39 For questions 6 and 7, use the following diagram. A. B. Slide 8 / 39 6 Box A is pointing to a ________ on a wave. A crest B trough Slide 9 / 39 7 Box B is pointing to a ________ on a wave. A crest B trough
Slide 10 / 39 8 ________ is the distance away from the rest position of a wave. It’s symbol is y. A Frequency B Wavelength C Crest D Amplitude Slide 11 / 39 9 The symbol for wavelength is the Greek letter A Lambda (λ) B Beta (B) C Gamma D Phi Slide 12 / 39 10 Period and frequency are inversely related to one another. A True B False
Slide 13 / 39 11 What is the velocity of a wave that has a wavelength of 10 cm and a frequency of 2 Hz? Slide 14 / 39 12 What is the velocity of a wave that has a wavelength of 5 m and a frequency of 5 Hz? Slide 15 / 39 13 What is the frequency of a wave traveling at 200 m/s when it’s wavelength is 10 m?
Slide 16 / 39 14 What is the wavelength of a wave that is traveling at 63 m/s when it’s frequency is 21 Hz? Slide 17 / 39 15 When waves hit a boundary or an obstacle and are reflected, they A continue through the obstacle B disappear C bounce back D break apart Slide 18 / 39 16 When refraction occurs, which changes, the wavelength or the frequency? A Wavelength B Frequency
Slide 19 / 39 17 When is diffraction most notable? A When the wavelength of the waves are much bigger in size than the opening they are passing through B When the wavelength of the waves are much smaller in size than the opening they are passing through C When the wavelength of the waves are similar in size to the opening they are passing through Slide 20 / 39 18 Diffraction is increased when waves pass through a large opening. A True B False Slide 21 / 39 19 When waves that are in phase (both vibrating in the same direction) with each other add up in amplitude to reinforce each other and get bigger, _____ occurs. A Constructive Interference B Destructive Interference
Slide 22 / 39 20 When waves that are out of phase (both vibrating in the opposite direction) with each other cancel out their amplitudes and get smaller, _______ occurs. A Constructive Interference B Destructive Interference Slide 23 / 39 21 The smaller the vibrating object, the lower the frequency sound produced. A True B False Slide 24 / 39 22 The SI unit for sound intensity is: A hertz B amplitude C frequency D decibel
Slide 25 / 39 23 As a vibrating object swings forward, it creates compression in the medium that moves outward. This is an area of A high pressure B low pressure Slide 26 / 39 24 When the vibrating object swings backward, it creates a rarefaction. This is an area of A high pressure B low pressure Slide 27 / 39 25 Choose the correct timeline of events which make up the “Path of Hearing” I. The waves vibrate bones (hammer, anvil, stirrup) II. The cochlea changes vibrations into electrical impulses III. Sound waves strike the eardrum IV. The signal is sent through the auditory nerve to the brain A IV, III, I, II B III, I, II, IV C III, I, IV, II D I, III, IV, II
Slide 28 / 39 26 The ear A is part of the auditory system B aids in balance and body position C is an organ that detects sound D All of the above Slide 29 / 39 27 The reflection of sound is known as a(n) A decibel B cochlea C echo D hertz Slide 30 / 39 28 SONAR uses the reflection of sound waves to map the sea floor of our oceans. A True B False
Slide 31 / 39 29 Echolocation uses ___________ sound waves to “see” how far away food is. A refracted B diffracted C reflected Slide 32 / 39 30 What is the speed of sound in air if a sound wave travels 3,000 meters in 10 seconds? Slide 33 / 39 31 What is the speed of sound in air if a sound wave travels 2,424 meters in 3 seconds?
Slide 34 / 39 32 How far away from a wall are we if a sound returns in 5 seconds (NOTE: speed of sound is 343 m/s)? Slide 35 / 39 33 Describe, in terms of wavelength and frequency, what an observer may hear from a moving sound source as the source approaches the observer, and then moves away from the observer. Slide 36 / 39 34 An observer moves toward a stationary alarm from a car going off. The moving observer hears A A lower pitched sound B A higher pitched sound C The same pitched that is produced
Slide 37 / 39 35 The same observer turns around and begins to walk away from the blaring car alarm. The moving observer hears A A lower pitched sound B A higher pitched sound C The same pitched that is produced Slide 38 / 39 36 When is a sonic boom produced? Slide 39 / 39 37 Traveling faster than the speed of sound is called “supersonic”. A True B False
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