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Grade 4 · Science · Unit 2 of 7

Sound

Vibrations, pitch, echoes and hearing

What your child practises

Vibrations and sound waves, pitch and volume, how sound travels through different materials but not through empty space, echoes and absorbing sound, how we hear, and how noise and sound devices affect people and animals.

Nunavut Curriculum approved guide: NWT Science and Technology K–6 (2004), Physical science · sound as energy made by vibrations

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    A bigger vibration makes a…

    🔊
    • louder sound
    • silent sound
    • quieter sound
    • higher pitch only

  2. Question 2

    A drum is hit softly, then hard. What changes?

    🥁
    • the volume
    • the colour
    • the speed of sound in air
    • the pitch of every sound

  3. Question 3

    Sound travels fastest through which of these?

    🚂
    • a steel rail
    • a vacuum
    • air

  4. Question 4

    Hearing aids help people by…

    🦻
    • making light brighter
    • making sounds easier to hear
    • making sound travel in a vacuum
    • changing colours

  5. Question 5

    Put the steps of hearing in order.

    • 🦴tiny bones in your ear vibrate
    • 🧠a nerve sends a message to your brain
    • 👂sound waves enter your ear
    • 🥁your eardrum vibrates

  6. Question 6

    Loud noises for a long time can…

    🎧
    • make you taller
    • help you see better
    • make you stronger
    • damage your hearing

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