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Where do echoes come from?

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4 questions
Show answers
  • Q1
    Ripples of energy
    travel
    waves
    echo
    reflect
    30s
  • Q2
    Sound waves that reflect back and are heard again
    dangerous
    echolocation
    waves
    echo
    30s
  • Q3
    To bounce back from something
    echolocation
    waves
    echo
    Reflect
    30s
  • Q4
    A way that some animals use sound waves to find things.
    sound
    animals
    echolocation
    echo
    30s

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