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Gr 10 Physical Sciences Ch 8 SUM: Sound
106 Questions
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Gr 10 Physical Sciences Ch 8 SUM: Sound

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Questions and Answers

What is the primary mechanism of ultrasound imaging?

  • Breaking up kidney stones
  • Transmitting sound waves into the body and detecting the reflected waves (correct)
  • Detering rodents and insects
  • Generating local heating in biological tissues

    • What is one of the therapeutic uses of ultrasound?

  • Creating an MRI image
  • Generating local cooling in biological tissues
  • Breaking up kidney stones (correct)
  • Detering rodents and insects

    • What is the purpose of focused ultrasound in cancer treatment?

  • To break up kidney stones
  • To create an MRI image
  • To deter rodents and insects
  • To generate local heating in biological tissues (correct)

    • What is the result of sound waves encountering a boundary between different types of tissues?

    <p>Part of the wave is reflected back while the rest is transmitted through the tissue</p> Signup and view all the answers

    What is the claim about ultrasound in pest control?

    <p>It can be used to deter rodents and insects</p> Signup and view all the answers

    What is the scientific evidence supporting the efficacy of ultrasound in pest control?

    <p>Lacking evidence supporting its efficacy</p> Signup and view all the answers

    What is the primary factor that affects the speed of sound in different media?

    <p>Density of particles</p> Signup and view all the answers

    What is the speed of sound in air at 20°C?

    <p>343 m/s</p> Signup and view all the answers

    In which medium does sound travel the fastest?

    <p>Solids</p> Signup and view all the answers

    What is the effect of increased temperature on the speed of sound?

    <p>It increases the speed of sound</p> Signup and view all the answers

    What is the formula used to calculate the speed of sound?

    <p>v = D/t</p> Signup and view all the answers

    What is the purpose of the starter's gun in the informal experiment?

    <p>To produce a loud sound</p> Signup and view all the answers

    What is the effect of increased air pressure on the speed of sound?

    <p>It increases the speed of sound</p> Signup and view all the answers

    What is the speed of sound in water at sea level?

    <p>1531 m/s</p> Signup and view all the answers

    What is the main factor to consider when using a stopwatch to measure time?

    <p>Reaction time</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

    <p>To detect ocean depth</p> Signup and view all the answers

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz</p> Signup and view all the answers

    What is the formula to calculate the wavelength of a sound wave?

    <p>λ = v/f</p> Signup and view all the answers

    What determines the loudness of a sound wave?

    <p>Amplitude of the sound wave</p> Signup and view all the answers

    What is the definition of ultrasound?

    <p>Sound waves with frequencies higher than 20 kHz</p> Signup and view all the answers

    Which of the following is an industrial application of ultrasound?

    <p>Cleaning of jewelry</p> Signup and view all the answers

    What is the main purpose of echolocation in animals?

    <p>To form a picture of their surroundings</p> Signup and view all the answers

    What is the effect of high amplitude on a sound wave?

    <p>It produces a louder sound</p> Signup and view all the answers

    What is the term for sound waves with frequencies lower than 20 Hz?

    <p>Infrasounds</p> Signup and view all the answers

    What is the outcome when sound waves encounter a boundary between different types of tissues?

    <p>The wave is partially reflected and partially transmitted</p> Signup and view all the answers

    What is a therapeutic application of ultrasound in physical therapy?

    <p>Generating localized heat in tissues</p> Signup and view all the answers

    What is the purpose of focused ultrasound in the treatment of kidney stones?

    <p>Breaking up kidney stones</p> Signup and view all the answers

    What is the verdict on the efficacy of ultrasound devices in pest control?

    <p>There is no scientific evidence supporting their efficacy</p> Signup and view all the answers

    What is the benefit of ultrasound in cancer treatment?

    <p>It generates localized heat in tissues</p> Signup and view all the answers

    What is the outcome when ultrasound is used to break up kidney stones?

    <p>The stones are completely broken up</p> Signup and view all the answers

    What is the term used to describe the sound wave that is heard after the original sound?

    <p>Echo</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

    <p>To detect ocean depth</p> Signup and view all the answers

    What is the term used to describe the perception of the frequency of a sound wave?

    <p>Pitch</p> Signup and view all the answers

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz</p> Signup and view all the answers

    What is the purpose of echolocation in animals like dolphins and bats?

    <p>To navigate and form a picture of their surroundings</p> Signup and view all the answers

    What determines the loudness of a sound wave?

    <p>Amplitude</p> Signup and view all the answers

    What is the term used to describe sound waves with frequencies higher than 20,000 Hz?

    <p>Ultrasounds</p> Signup and view all the answers

    What is an industrial application of ultrasound?

    <p>All of the above</p> Signup and view all the answers

    What is the formula used to calculate the wavelength of a sound wave?

    <p>λ = v/f</p> Signup and view all the answers

    What is the purpose of using the average time from multiple readings?

    <p>To increase accuracy</p> Signup and view all the answers

    What is the main reason why sound travels faster in solids than in gases?

    <p>Particles in solids are closer together than in gases.</p> Signup and view all the answers

    What is the speed of sound in air at sea level and 21°C under normal atmospheric conditions?

    <p>344 m/s</p> Signup and view all the answers

    What is the correct order of the speed of sound from fastest to slowest in different media?

    <p>Solids &gt; Liquids &gt; Gases</p> Signup and view all the answers

    What is the effect of increased pressure on the speed of sound?

    <p>It increases the speed of sound.</p> Signup and view all the answers

    What is the purpose of repeating the measurement several times in the informal experiment?

    <p>To increase the accuracy of the measurement.</p> Signup and view all the answers

    What is the formula used to calculate the speed of sound in the informal experiment?

    <p>v = D/t</p> Signup and view all the answers

    Why does sound travel faster in aluminium than in copper?

    <p>Aluminium has a higher density than copper.</p> Signup and view all the answers

    What is the main factor that affects the speed of sound in different media?

    <p>Density and proximity of particles</p> Signup and view all the answers

    What is the benefit of generating local heating in biological tissues using ultrasound?

    <p>Aiding in physical therapy</p> Signup and view all the answers

    What is the primary function of the reflected sound waves in ultrasound imaging?

    <p>To construct an image of internal structures</p> Signup and view all the answers

    What is the purpose of focused ultrasound in the treatment of kidney stones?

    <p>To break up kidney stones</p> Signup and view all the answers

    What is the current verdict on the efficacy of ultrasound devices in pest control?

    <p>There is no scientific evidence to support their effectiveness</p> Signup and view all the answers

    What is the approximate speed of sound in water at sea level?

    <p>1530 m/s</p> Signup and view all the answers

    What is the primary mechanism by which ultrasound imaging works?

    <p>Transmitting sound waves into the body and detecting the reflected waves</p> Signup and view all the answers

    What is the reason for the increase in the speed of sound with an increase in temperature?

    <p>Particles move more rapidly and transmit sound waves more efficiently</p> Signup and view all the answers

    What is the benefit of using ultrasound in cancer treatment?

    <p>It can generate local heating in tissues</p> Signup and view all the answers

    What is the correct order of the speed of sound from fastest to slowest in different media?

    <p>Solids, liquids, gases</p> Signup and view all the answers

    What is the effect of increased air pressure at sea level on the speed of sound?

    <p>The speed of sound increases</p> Signup and view all the answers

    What is the purpose of the stopwatch in the informal experiment?

    <p>To measure the time taken for the sound to travel a certain distance</p> Signup and view all the answers

    What is the factor that affects the speed of sound in different media?

    <p>All of the above</p> Signup and view all the answers

    What is the formula used to calculate the speed of sound in the informal experiment?

    <p>v = D/t</p> Signup and view all the answers

    What is the reason why sound travels faster in aluminium than in lead?

    <p>Aluminium has a higher density than lead</p> Signup and view all the answers

    What is the primary reason for using the average time from multiple readings in the informal experiment?

    <p>To minimize the impact of human error</p> Signup and view all the answers

    What is the characteristic of a sound wave that determines how high or low a sound is perceived?

    <p>Pitch</p> Signup and view all the answers

    What is the term used to describe the sound wave that is heard after the original sound?

    <p>Echo</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

    <p>To determine ocean depth</p> Signup and view all the answers

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz</p> Signup and view all the answers

    What is the term used to describe sound waves with frequencies lower than 20 Hz?

    <p>Infrasounds</p> Signup and view all the answers

    What is the primary factor that affects the loudness of a sound wave?

    <p>Amplitude</p> Signup and view all the answers

    What is the purpose of echolocation in animals like dolphins and bats?

    <p>To navigate through their surroundings</p> Signup and view all the answers

    What is the formula used to calculate the wavelength of a sound wave?

    <p>λ = v / f</p> Signup and view all the answers

    What is the term used to describe sound waves with frequencies higher than 20,000 Hz?

    <p>Ultrasounds</p> Signup and view all the answers

    What is the primary factor that affects the loudness of a sound wave?

    <p>Amplitude of the sound wave</p> Signup and view all the answers

    Which of the following animals uses echolocation to navigate?

    <p>Dolphins and bats</p> Signup and view all the answers

    What is the term used to describe sound waves with frequencies lower than 20 Hz?

    <p>Infrasounds</p> Signup and view all the answers

    What is the purpose of using ultrasound in material testing?

    <p>To detect flaws in materials</p> Signup and view all the answers

    What is the formula used to calculate the wavelength of a sound wave?

    <p>λ = v ÷ f</p> Signup and view all the answers

    What is the term used to describe the perception of the frequency of a sound wave?

    <p>Pitch</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

    <p>To determine ocean depth</p> Signup and view all the answers

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz</p> Signup and view all the answers

    What is the term used to describe the reflected sound wave that is heard after the original sound?

    <p>Echo</p> Signup and view all the answers

    What is the purpose of repeating the measurement several times in the informal experiment?

    <p>To calculate the average time</p> Signup and view all the answers

    What is the main reason why sound travels faster in solids than in gases?

    <p>Solids have a more efficient transfer of kinetic energy between particles</p> Signup and view all the answers

    What is the effect of increased air pressure on the speed of sound in air?

    <p>It increases the speed of sound</p> Signup and view all the answers

    Why does the speed of sound in air increase with temperature?

    <p>Particles move more rapidly and transmit sound waves more efficiently</p> Signup and view all the answers

    What is the purpose of repeating the measurement several times in the informal experiment?

    <p>To increase the accuracy of the measurement</p> Signup and view all the answers

    What is the correct order of the speed of sound from fastest to slowest in different media?

    <p>Solids, liquids, gases</p> Signup and view all the answers

    What is the main factor that affects the speed of sound in different media?

    <p>Density of the medium</p> Signup and view all the answers

    What is the purpose of the starter's gun in the informal experiment?

    <p>To produce a loud sound</p> Signup and view all the answers

    What is the formula used to calculate the speed of sound in the informal experiment?

    <p>v = D/t</p> Signup and view all the answers

    What is the primary advantage of using ultrasound to generate local heating in biological tissues?

    <p>It is a non-invasive procedure</p> Signup and view all the answers

    What is the main limitation of using ultrasound devices for pest control?

    <p>There is a lack of scientific evidence supporting their efficacy</p> Signup and view all the answers

    What is the ultimate goal of detecting the reflected sound waves in ultrasound imaging?

    <p>To create a detailed image of the internal structures</p> Signup and view all the answers

    What is the primary benefit of using focused ultrasound to break up kidney stones?

    <p>It is a non-invasive procedure</p> Signup and view all the answers

    What is the main difference between the mechanism of ultrasound imaging and other medical imaging techniques?

    <p>It uses sound waves instead of electromagnetic radiation</p> Signup and view all the answers

    What is the primary application of ultrasound in physical therapy?

    <p>To generate local heating in tissues</p> Signup and view all the answers

    What is the primary mechanism by which ultrasound breaks up kidney stones?

    <p>By creating a pressure wave that disrupts the stone</p> Signup and view all the answers

    What is the main benefit of generating local heating in biological tissues using ultrasound?

    <p>It helps in physical therapy and cancer treatment</p> Signup and view all the answers

    What is the primary limitation of using ultrasound devices in pest control?

    <p>There is a lack of scientific evidence supporting their efficacy</p> Signup and view all the answers

    What is the primary reason why ultrasound imaging is useful in medical diagnosis?

    <p>It can construct an image of internal structures using reflected sound waves</p> Signup and view all the answers

    What is the primary difference between the mechanism of ultrasound imaging and the mechanism of breaking up kidney stones?

    <p>One uses reflected sound waves, while the other uses transmitted sound waves</p> Signup and view all the answers

    What is the outcome when sound waves encounter a boundary between different types of tissues?

    <p>Part of the wave is reflected back while the rest is transmitted through the tissue</p> Signup and view all the answers

    What is a therapeutic application of ultrasound?

    <p>Generate localized heat in tissues for physical therapy</p> Signup and view all the answers

    What is the purpose of focused ultrasound in the treatment of kidney stones?

    <p>To break up kidney stones</p> Signup and view all the answers

    What is the verdict on the efficacy of ultrasound devices in pest control?

    <p>There is no scientific evidence supporting their efficacy</p> Signup and view all the answers

    What is the benefit of generating local heating in biological tissues using ultrasound?

    <p>To aid in physical therapy</p> Signup and view all the answers

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