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Quiz 1: Introduction to Sound Waves

Quiz by Mr.MD Showket Hasan

Grade 9
Science
Thailand Core Curriculum

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15 questions
Show answers
  • Q1
    What is the primary way a speaker creates sound?
    By moving the diaphragm back and forth rapidly
    By vibrating air molecules
    By creating wind
    By transmitting electrical signals
    30s
    SC9.E.1
  • Q2
    What scientific term is used to describe the back and forth motion of an object?
    Undulation
    Oscillation
    Fluctuation
    Vibration
    30s
  • Q3
    Why does a piece of paper placed on a speaker "dance"?
    Due to electrical charges in the paper
    Due to sound waves pushing the paper upwards
    Because the diaphragm is oscillating and bumping into the paper
    Because of wind created by the speaker
    30s
  • Q4
    How do air molecules in front of a speaker behave when sound is produced?
    They move in circular patterns
    They oscillate back and forth
    They remain completely stationary
    They travel away from the speaker
    30s
  • Q5
    How does sound travel from a speaker to your ear?
    Air molecules travel directly from the speaker to your ear
    Oscillations are passed from one group of air molecules to the next
    The speaker shoots tiny particles that hit your eardrum
    Sound waves create wind that blows into your ear
    30s
  • Q6
    What is the medium in most situations involving sound waves?
    Metal
    Vacuum
    Air
    Water
    30s
  • Q7
    Which of the following is NOT a medium through which sound waves can travel?
    Human flesh
    Vacuum
    Water
    Metal
    30s
  • Q8
    What allows waves to transport energy through a medium without transporting the medium itself?
    The amplitude of the wave
    The frequency of the wave
    The speed of the wave
    The oscillation of particles in the medium
    30s
  • Q9
    Why do our voices sound different on audio recordings compared to how we hear them?
    Microphones distort our voices
    Our ears hear differently when we speak
    Audio recordings only capture air-conducted sound, not bone-conducted sound
    Audio recordings amplify certain frequencies
    30s
  • Q10
    When we speak, how many "contributions" to our voice do we typically hear?
    Four
    One
    Two
    Three
    30s
  • Q11
    Which path does NOT contribute to how we hear our own voice when speaking?
    Vibrations traveling through our flesh to our eardrums
    Sound waves traveling through air to our ears
    Vibrations traveling through our skull to our eardrums
    Sound waves reflecting off nearby surfaces
    30s
  • Q12
    What type of energy does oscillating air next to your ear possess?
    Kinetic energy
    Thermal energy
    Potential energy
    Chemical energy
    30s
  • Q13
    Which statement best describes how sound waves transport energy?
    By transferring oscillations from one group of particles to the next
    By moving air molecules from one place to another
    By generating heat in the medium
    By creating wind currents
    30s
  • Q14
    If air were being transported across the room from a sound source, it would be better characterized as:
    An echo
    Resonance
    A sound wave
    Wind
    30s
  • Q15
    According to the video, why shouldn't you worry too much about how your voice sounds on recordings?
    Because you can easily change your voice
    Because your friends are used to how your voice sounds
    Because you shouldn't waste time worrying about what others think of you
    Because audio recordings are usually inaccurate
    30s

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