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 (B)</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 (C)</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 (B)</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 (A)</p> Signup and view all the answers

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

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

    In which medium does sound travel the fastest?

    <p>Solids (A)</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 (C)</p> Signup and view all the answers

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

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

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

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

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

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

    What is the purpose of SONAR in ships?

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

    What is the range of frequencies that humans can detect?

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

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

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

    What determines the loudness of a sound wave?

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

    What is the definition of ultrasound?

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

    Which of the following is an industrial application of ultrasound?

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

    What is the main purpose of echolocation in animals?

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

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

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

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

    <p>Infrasounds (A)</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 (C)</p> Signup and view all the answers

    What is a therapeutic application of ultrasound in physical therapy?

    <p>Generating localized heat in tissues (A)</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 (C)</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 (A)</p> Signup and view all the answers

    What is the benefit of ultrasound in cancer treatment?

    <p>It generates localized heat in tissues (C)</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 (A)</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 (D)</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

    <p>To detect ocean depth (C)</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 (D)</p> Signup and view all the answers

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz (B)</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 (C)</p> Signup and view all the answers

    What determines the loudness of a sound wave?

    <p>Amplitude (C)</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 (D)</p> Signup and view all the answers

    What is an industrial application of ultrasound?

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

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

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

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

    <p>To increase accuracy (B)</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. (C)</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 (B)</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 (C)</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. (D)</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. (A)</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 (B)</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. (B)</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 (C)</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 (B)</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 (C)</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 (D)</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 (C)</p> Signup and view all the answers

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

    <p>1530 m/s (C)</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 (D)</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 (A)</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 (C)</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 (C)</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 (A)</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 (A)</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 (D)</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 (D)</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 (D)</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 (C)</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 (B)</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 (B)</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

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

    What is the range of frequencies that humans can detect?

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

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

    <p>Infrasounds (C)</p> Signup and view all the answers

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

    <p>Amplitude (C)</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 (C)</p> Signup and view all the answers

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

    <p>λ = v / f (C)</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 (C)</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 (A)</p> Signup and view all the answers

    Which of the following animals uses echolocation to navigate?

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

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

    <p>Infrasounds (D)</p> Signup and view all the answers

    What is the purpose of using ultrasound in material testing?

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

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

    <p>λ = v ÷ f (B)</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 (A)</p> Signup and view all the answers

    What is the purpose of SONAR in ships?

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

    What is the range of frequencies that humans can detect?

    <p>20 Hz to 20,000 Hz (D)</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 (B)</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 (B)</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 (C)</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 (D)</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 (A)</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 (B)</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 (B)</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 (B)</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 (A)</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 (B)</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 (C)</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 (C)</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 (D)</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 (C)</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 (C)</p> Signup and view all the answers

    What is the primary application of ultrasound in physical therapy?

    <p>To generate local heating in tissues (A)</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 (D)</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 (A)</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 (C)</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 (B)</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 (D)</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 (C)</p> Signup and view all the answers

    What is a therapeutic application of ultrasound?

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

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