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Chapter 17 Waves Study Guide. Longitudinal. Transverse. Surface Waves. Water Waves Combo longitudinal and transverse. Refraction. Diffraction. Reflection. Sound takes time to hit walls of a cave and since the wave can not pass through it reflects back. Why do you hear echoes?.
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Sound takes time to hit walls of a cave and since the wave can not pass through it reflects back. • Why do you hear echoes?
The material in the egg carton absorbs the sound waves. • How do egg cartons sound proof your room?
What is the difference between Frequency and Speed? • Frequency is the amount of waves that go by in a given period of time. • Speed is distance traveled in any amount of time.
The door prevented the wire from vibrating which prevented any sound waves from traveling. • Why did the homemade phone (with the two cups and wire) not work when the door was shut?
d. constructive interference • What happens when two waves meet and create a wave with a taller amplitude? • a. destructive interference • c. a date • b. no one knows • d. constructive interference
d. All of the above • Which type of mechanical wave needs a source of energy to produce it? • Transverse wave • Longitudinal wave • Surface wave • All of the above
The wave must enter a new medium at an angle. • Describe how a wave must enter a new medium in order to refraction to occur.
c. Longitudinal wave • Which wave cause the medium to vibrate only in a direction parallel to wave’s motion? • Transverse wave • Surface wave • Longitudinal wave • None of the above
c. Enter a new medium at an angle • For refraction to occur in a wave, the wave must • Strike an obstacle larger then the wavelength • Change direction within a medium • Enter a new medium at an angle • Enter a new medium head-on
Air, water, rope, metal • List some of the types of media that can transport waves.
c. Like a slinky • In an earthquake, a P wave is a longitudinal wave. It moves through soil and rock • Wavy line • Not at all • Like a slinky • Like an ocean wave
d. None of the above • Amplitude is • How high the wave gets • How wide the wave gets • The pitch of the wave • None of the above
d. reflection • When a wave strikes a solid barrier, it behaves like a basketball hitting a backboard. This wave barrier is called • Constructive interference • Diffraction • Refraction • Reflection
longitudinal • A wave in a rope is a transverse wave, but a sound wave is a(n) ___________ wave.
b. Transfer energy through a medium • Transverse and longitudinal waves both • Have compressions and rarefactions • Transfer energy through a medium • Move at right angles to the vibration of the medium • Are capable of moving the medium a long distance.
d. Surface wave • A disturbance sends ripples across water in a tub. These ripples are an example of a • Rarefaction • Longitudinal wave • Compression • Surface wave
d. The Doppler effect • An ambulance siren sounds different as it approaches you than when it moves away from you. What scientific term would you use to explain how this happens? • Ultrasound • Diffraction • Rarefaction • The Doppler effect
b. Longitudinal wave • A sound wave is an example of a • Transverse wave • Longitudinal wave • Standing wave • Surface wave
c. The time delay of the returning echoes • Sonar equipment sends sound waves into deep water and measures • Refraction of the transmitted wave • Only the direction of the reflected wave • The time delay of the returning echoes • Interference of the transmitted and reflected waves
energy • You can make a wave in a rope by adding ____________ at one end of the rope.
d. All of the above • A mechanical wave moves through a medium, which can be • Liquid c. gas • Solid d. all of the above
perpendicular • Wave in a rope are transverse wave because the medium’s vibration is __________to the direction in which the wave travels.
Surface waves • A pebble drops straight down into a tub of water, setting off __________ in the direction in which the wave travels.
wavelength • In a transverse wave, _________is measured form crest to crest or from trough to trough.
refraction • When white light enters a prism and then air around it separates into the different colors. This is an example of
decibel • The standard measure used to compare sound intensities is the
Doppler Effect • When a train streaks by blowing its whistle, the changing pitch you hear is due to the
Sound waves, like other kinds of waves, reflect, or bounce back, when they strike a solid barrier. It takes time for the echo to return, traveling at the speed of sound, so there is a delay • In a large cave, you can hear an echo a few seconds after you speak. Explain how this happens in terms of wave properties.
A medium is the material through which a mechanical wave travels. • What is a medium?
The wave will bend or diffract • Consider a wave approaching a barrier with a small hole. What change Is the wave likely to undergo as it encounters the barrier?
Shorter, faster vibrations • I have one short tuning fork and one long tuning fork. Which one will have a higher pitch? Why does it have a higher pitch (do not say because it is shorter or longer!)
A longitudinal wave • What type of mechanical wave is produced by a slinky?
Weather radar • Give one example of the Doppler effect?
Hertz, cycles per second, 1/s • In what unit is wave frequency measured?
Sonar, imaging • Give one example of an ultrasound.
In reflection, a wave hits a solid barrier that it cannot penetrate, so itreflects, or bounces back, in roughly the same direction from which it came. In refraction, a wave hits a change in the medium, but instead of reflecting (bouncing back), it continues on into the new medium, bending as its speed changes. • Explain the difference between reflection and refraction.
The sun • What is the primary source of energy for Planet Earth?
