ScienceAges 7-9

Sound, pitch & vibrations

Explore how vibrations produce sound waves, how pitch and volume change, and how sound travels through media. Review suitability for your learners before teaching.

New variation Try interactive challenge Browse templates

Age band:Ages 4-6 Ages 7-9

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 7-9

Sound, pitch & vibrations

Take your time. Show your thinking.

1. Does sound travel fastest through a gas (air), a liquid (water) or a solid (steel): a solid (steel) or a gas (air)?
Amplitude (Loudness) · Frequency (Pitch)
2. What unit is used in science to measure the frequency of a sound wave (the number of vibrations per second): hertz (Hz) or newtons (N)?
Amplitude (Loudness) · Frequency (Pitch)
3. What is the approximate frequency range of normal human hearing in young people: 20 Hz to 20,000 Hz, or 1 Hz to 5 Hz?
Amplitude (Loudness) · Frequency (Pitch)
4. What word describes how loud or quiet a sound is: volume (loudness) or pitch?
Amplitude (Loudness) · Frequency (Pitch)
5. Why are cinema walls and recording studios lined with soft foam, curtains and carpets: soft, porous materials absorb sound waves to prevent echoes, or soft foam makes sounds louder?
Amplitude (Loudness) · Frequency (Pitch)
6. Why does a sound become quieter the further away you move from the source: the sound energy spreads out over a larger and larger sphere of air, or the pitch drops to zero?
Amplitude (Loudness) · Frequency (Pitch)
7. If you gently touch a ringing tuning fork against the surface of a bowl of water, why does the water splash: the tuning fork is vibrating rapidly, or the tuning fork is hot?
Amplitude (Loudness) · Frequency (Pitch)
8. How do bats and dolphins use echolocation (sonar) to find prey in the dark or deep water: they emit high-pitched clicks and time how long the echoes take to bounce back, or they use magnets?
Amplitude (Loudness) · Frequency (Pitch)
9. If you hit a drum harder so the drum skin vibrates with a larger amplitude, what happens to the sound: the sound gets louder (higher volume), or the pitch changes into a flute?
Amplitude (Loudness) · Frequency (Pitch)
10. What word describes how high or low a musical note sounds (such as a high whistle vs a low bass drum): pitch or volume?
Amplitude (Loudness) · Frequency (Pitch)
11. What is an echo: a sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears, or a brand-new sound made by the rocks?
Amplitude (Loudness) · Frequency (Pitch)
12. When you speak or sing and gently rest your fingers on the front of your throat, what do you feel vibrating inside your voice box (larynx): your vocal cords, or your collarbone?
Amplitude (Loudness) · Frequency (Pitch)

12 questions · Seed 49 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 7-9

Sound, pitch & vibrations

Answers and reasoning. Review before teaching.

1. Does sound travel fastest through a gas (air), a liquid (water) or a solid (steel): a solid (steel) or a gas (air)?
A solid (steel)
Particles in a solid are packed closely together with strong bonds, passing vibrations much faster (~5,000 m/s in steel vs ~340 m/s in air).
2. What unit is used in science to measure the frequency of a sound wave (the number of vibrations per second): hertz (Hz) or newtons (N)?
Hertz (Hz)
1 hertz (1 Hz) equals 1 complete vibration (cycle) per second.
3. What is the approximate frequency range of normal human hearing in young people: 20 Hz to 20,000 Hz, or 1 Hz to 5 Hz?
20 Hz to 20,000 Hz
Humans typically hear frequencies from about 20 Hz (deep bass) up to 20,000 Hz (20 kHz).
4. What word describes how loud or quiet a sound is: volume (loudness) or pitch?
Volume (loudness)
Volume depends on the amplitude (size) of the vibrations.
5. Why are cinema walls and recording studios lined with soft foam, curtains and carpets: soft, porous materials absorb sound waves to prevent echoes, or soft foam makes sounds louder?
Soft, porous materials absorb sound waves to prevent echoes
Soft materials trap air and convert sound energy into tiny amounts of heat, reducing reverberation.
6. Why does a sound become quieter the further away you move from the source: the sound energy spreads out over a larger and larger sphere of air, or the pitch drops to zero?
The sound energy spreads out over a larger and larger sphere of air
As distance from the source increases, the wave energy is spread over a bigger area, so amplitude decreases.
7. If you gently touch a ringing tuning fork against the surface of a bowl of water, why does the water splash: the tuning fork is vibrating rapidly, or the tuning fork is hot?
The tuning fork is vibrating rapidly
The mechanical vibrations of the prongs transfer energy to the water, creating ripples and splashes.
8. How do bats and dolphins use echolocation (sonar) to find prey in the dark or deep water: they emit high-pitched clicks and time how long the echoes take to bounce back, or they use magnets?
They emit high-pitched clicks and time how long the echoes take to bounce back
The time delay and direction of returning echoes reveal the distance and location of objects.
9. If you hit a drum harder so the drum skin vibrates with a larger amplitude, what happens to the sound: the sound gets louder (higher volume), or the pitch changes into a flute?
The sound gets louder (higher volume)
Larger amplitude vibrations carry more energy and produce a louder sound.
10. What word describes how high or low a musical note sounds (such as a high whistle vs a low bass drum): pitch or volume?
Pitch
Pitch is how high or low a sound is and depends on the frequency of vibration.
11. What is an echo: a sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears, or a brand-new sound made by the rocks?
A sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears
An echo is a reflected sound wave heard a short time after the original sound.
12. When you speak or sing and gently rest your fingers on the front of your throat, what do you feel vibrating inside your voice box (larynx): your vocal cords, or your collarbone?
Your vocal cords
Air from the lungs passes between the vocal cords in the larynx, making them vibrate to produce your voice.

12 questions · Seed 49 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 7-9

Sound, pitch & vibrations

Take your time. Show your thinking.

1. Does sound travel fastest through a gas (air), a liquid (water) or a solid (steel): a solid (steel) or a gas (air)?
Amplitude (Loudness) · Frequency (Pitch)
2. What unit is used in science to measure the frequency of a sound wave (the number of vibrations per second): hertz (Hz) or newtons (N)?
Amplitude (Loudness) · Frequency (Pitch)
3. What is the approximate frequency range of normal human hearing in young people: 20 Hz to 20,000 Hz, or 1 Hz to 5 Hz?
Amplitude (Loudness) · Frequency (Pitch)
4. What word describes how loud or quiet a sound is: volume (loudness) or pitch?
Amplitude (Loudness) · Frequency (Pitch)
5. Why are cinema walls and recording studios lined with soft foam, curtains and carpets: soft, porous materials absorb sound waves to prevent echoes, or soft foam makes sounds louder?
Amplitude (Loudness) · Frequency (Pitch)
6. Why does a sound become quieter the further away you move from the source: the sound energy spreads out over a larger and larger sphere of air, or the pitch drops to zero?
Amplitude (Loudness) · Frequency (Pitch)
7. If you gently touch a ringing tuning fork against the surface of a bowl of water, why does the water splash: the tuning fork is vibrating rapidly, or the tuning fork is hot?
Amplitude (Loudness) · Frequency (Pitch)
8. How do bats and dolphins use echolocation (sonar) to find prey in the dark or deep water: they emit high-pitched clicks and time how long the echoes take to bounce back, or they use magnets?
Amplitude (Loudness) · Frequency (Pitch)
9. If you hit a drum harder so the drum skin vibrates with a larger amplitude, what happens to the sound: the sound gets louder (higher volume), or the pitch changes into a flute?
Amplitude (Loudness) · Frequency (Pitch)
10. What word describes how high or low a musical note sounds (such as a high whistle vs a low bass drum): pitch or volume?
Amplitude (Loudness) · Frequency (Pitch)
11. What is an echo: a sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears, or a brand-new sound made by the rocks?
Amplitude (Loudness) · Frequency (Pitch)
12. When you speak or sing and gently rest your fingers on the front of your throat, what do you feel vibrating inside your voice box (larynx): your vocal cords, or your collarbone?
Amplitude (Loudness) · Frequency (Pitch)

12 questions · Seed 49 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 7-9

Sound, pitch & vibrations

Answers and reasoning. Review before teaching.

1. Does sound travel fastest through a gas (air), a liquid (water) or a solid (steel): a solid (steel) or a gas (air)?
A solid (steel)
Particles in a solid are packed closely together with strong bonds, passing vibrations much faster (~5,000 m/s in steel vs ~340 m/s in air).
2. What unit is used in science to measure the frequency of a sound wave (the number of vibrations per second): hertz (Hz) or newtons (N)?
Hertz (Hz)
1 hertz (1 Hz) equals 1 complete vibration (cycle) per second.
3. What is the approximate frequency range of normal human hearing in young people: 20 Hz to 20,000 Hz, or 1 Hz to 5 Hz?
20 Hz to 20,000 Hz
Humans typically hear frequencies from about 20 Hz (deep bass) up to 20,000 Hz (20 kHz).
4. What word describes how loud or quiet a sound is: volume (loudness) or pitch?
Volume (loudness)
Volume depends on the amplitude (size) of the vibrations.
5. Why are cinema walls and recording studios lined with soft foam, curtains and carpets: soft, porous materials absorb sound waves to prevent echoes, or soft foam makes sounds louder?
Soft, porous materials absorb sound waves to prevent echoes
Soft materials trap air and convert sound energy into tiny amounts of heat, reducing reverberation.
6. Why does a sound become quieter the further away you move from the source: the sound energy spreads out over a larger and larger sphere of air, or the pitch drops to zero?
The sound energy spreads out over a larger and larger sphere of air
As distance from the source increases, the wave energy is spread over a bigger area, so amplitude decreases.
7. If you gently touch a ringing tuning fork against the surface of a bowl of water, why does the water splash: the tuning fork is vibrating rapidly, or the tuning fork is hot?
The tuning fork is vibrating rapidly
The mechanical vibrations of the prongs transfer energy to the water, creating ripples and splashes.
8. How do bats and dolphins use echolocation (sonar) to find prey in the dark or deep water: they emit high-pitched clicks and time how long the echoes take to bounce back, or they use magnets?
They emit high-pitched clicks and time how long the echoes take to bounce back
The time delay and direction of returning echoes reveal the distance and location of objects.
9. If you hit a drum harder so the drum skin vibrates with a larger amplitude, what happens to the sound: the sound gets louder (higher volume), or the pitch changes into a flute?
The sound gets louder (higher volume)
Larger amplitude vibrations carry more energy and produce a louder sound.
10. What word describes how high or low a musical note sounds (such as a high whistle vs a low bass drum): pitch or volume?
Pitch
Pitch is how high or low a sound is and depends on the frequency of vibration.
11. What is an echo: a sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears, or a brand-new sound made by the rocks?
A sound wave that bounces (reflects) off a hard surface like a cliff or wall and returns to your ears
An echo is a reflected sound wave heard a short time after the original sound.
12. When you speak or sing and gently rest your fingers on the front of your throat, what do you feel vibrating inside your voice box (larynx): your vocal cords, or your collarbone?
Your vocal cords
Air from the lungs passes between the vocal cords in the larynx, making them vibrate to produce your voice.

12 questions · Seed 49 · Age guidance, not curriculum certification