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Chapter 10
DHS PS Ch. 10 - Sound (2015/2016)
| Question | Answer |
|---|---|
| A material through which a wave transfers energy is called a? | medium |
| Sound would not travel through this type of medium? | vacuum |
| What type of waves are sound waves? | longitudinal |
| A repeating disturbance that transfers energy through matter or open space is a? | wave |
| What do waves carry? | energy |
| In what type of waves does matter in the medium move back and forth and in the same direction the wave travels? | longitudinal |
| What is a measure of the energy in a wave? | amplitude |
| _________ is how many wavelengths pass a fixed point each second? | frequency |
| What is the less dense region of a longitudinal wave called? | rarefaction |
| As a frequency increases, wavelength _____? | decreases |
| Vibrating molecules pass energy on to ______ ? | neighboring molecules |
| All waves are produced by something that ______ ? | vibrates |
| A material through which a wave travels is called a ____? | medium |
| A medium may be what type of matter? | solid, liquid, or a gas |
| Frequency is expressed in? | hertz (Hz) |
| As frequency increases wavelength? | decreases |
| The frequency of a wave equals the rate of? | vibration of the souce that creates it |
| How fast a wave moves forward is called? | wave velocity |
| Sound waves travel faster in this than in a gas? | liquids and solids |
| The more energy a wave carries, its amplitude will be ____ ? | greater |
| The denser the compressions, the ______ the amplitude is and the more energy the wave carries | larger |
| The less dense the rarefactions, the ______ the amplitude and the more energy the wave carries. | larger |
| When does reflection happen? | when a wave strikes an object and bounces off of it |
| The angle of incidence of a wave is always equal to the angle of? | reflection |
| The bending of a wave caused by a change in its speed as it moves from one medium to another is called a? | refraction |
| What is the ability of an object to vibrate by absorbing energy at its natural frequency? | resonance |
| The ability of an object to vibrate by absorbing energy at its natural frequency is called? | resonance |
| Sounds are produces by? | vibrations |
| How does temperature of a medium affect the speed of sound waves? | as the temperature of a substance increases, sound waves in it move faster |
| In the human ear, sound waves are gathered in the? | outer ear |
| What is the spiral-shaped structure filled with liquid in the human ear? | cochlea |
| What is the amount of energy that flows through a certain area in a specific amount of time called? | intensity |
| The human perception of sound intensity is called? | loudness |
| The intensity of sound is measure din units called? | decibels |
| The human perception of sound frequency is called? | pitch |
| Waves that have sound frequencies above 20,000 Hz are called? | ultrasonic |
| The change in pitch due to a moving wave source is called? | the Doppler effect |
| As an ambulance races toward you and then past you, what would the pitch of its siren do? | higher then lower |
| If the intensity of a sound decreases, what else decreases? | loudness |
| A tuning fork starts to vibrate when a certian note is played on the piano. This is an example of? | resonance |
| The intensity of a sound describes? | it's loudness at a particular distance |
| The way your brain interprets the intensity of a sound is called? | loudness |
| How does temperature of a medium affect the speed of sound waves? | as the temperature of a substance increases, sound waves in it move faster |
| A wave will travel only as long as it has what to carry it? | energy |
| For the Doppler effect to occur what must happen? | either source or listener must be moving |
| The pitch of a sound is most closely related to the? | frequency |
| When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the? | hammer, anvil, and stirrup |
| The unit used to measure frequency is called? | hertz |
| If you double the distance from a sound source, the intensity will ______ ? | 1/4th |
| If you triple the distance from a sound source, the intensity will ______ ? | 1/9th |
| If you quadruple the distance from a sound source, the intensity will ______ ? | 1/16th |
| An 85 dB sound is how many times more intense that a 45 dB sound? | 10,000X |
| An 65 dB sound is how many times more intense that a 55 dB sound? | 10X |
| An 115 dB sound is how many times more intense that a 65 dB sound? | 100,000X |
| The study of sound is called ____ ? | acoustics |
| Bats and dolphins use ____ to navigate and find prey. | echolocation |
| The echoing effect produced by many reflections of sound is called _____ . | reverberation |
| Cloth drapes, cushioned seats, and carped floors help to _____ reverberations. | reduce |
| _______ is a system that uses the reflection of underwater sound waves to detect objects. | sonar |
| Sounds with frequencies greater than 20,000 Hz are known as _____ . | ultrasonic |
| An underwater microphone used to pick up the reflected sonar signal is called a _______ . | hydrophone |
| Video image of an ultrasound is called a ____ . | sonogram |
| Ultrasound can be used to break up _____ _______ . | kidney stones |
| Humans can hear sound frequencies between ______ and ______ . | 20 Hz to 20,000 Hz |
| Dogs can hear frequencies up to _______. | 35,000 Hz |
| Bats can hear frequencies up to _____ . | 100,000 Hz |
Created by:
aubiefan
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