Let's solve this worksheet step by step using the given vocabulary words:
Vocabulary Words:
- Sound
- Pitch
- Noise
- Vibrations
- Frequency
- Decibel
- Sound level meter
- Vacuum
- Hertz
- Loudness
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1. _________ is what we can hear.
✔ Answer: Sound
*Explanation:* Sound is the physical phenomenon that our ears detect and interpret as hearing.
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2. Sound is made up of _____________.
✔ Answer: Vibrations
*Explanation:* Sound is produced when objects vibrate, creating pressure waves in a medium (like air).
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3. _________ how high or low a sound.
✔ Answer: Pitch
*Explanation:* Pitch refers to how high or low a sound seems to us — determined by frequency.
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4. _________ how many vibrations in a second.
✔ Answer: Frequency
*Explanation:* Frequency measures the number of vibrations per second, which determines pitch.
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5. _________ a place where we cannot make any sound, or we cannot hear any sound.
✔ Answer: Vacuum
*Explanation:* Sound needs a medium (solid, liquid, gas) to travel. In a vacuum (no air), sound cannot travel.
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6. _________ how much energy a sound has.
✔ Answer: Loudness
*Explanation:* Loudness is how strong or intense a sound seems, related to the amplitude of the sound wave.
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7. _________ unit of frequency.
✔ Answer: Hertz
*Explanation:* The unit for frequency is hertz (Hz), meaning one vibration per second.
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8. _________ unit of loudness.
✔ Answer: Decibel
*Explanation:* Loudness is measured in decibels (dB), which quantify the intensity of sound.
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9. _________ unpleasant or bad sounds that are painful to hear.
✔ Answer: Noise
*Explanation:* Noise refers to unwanted or harsh sounds that are often disruptive or uncomfortable.
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10. _________ use to measure the loudness of sound.
✔ Answer: Sound level meter
*Explanation:* A sound level meter is a device used to measure the intensity of sound in decibels.
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11–13. What are the three mediums of sound?
✔ Answers:
1.
Solid
2.
Liquid
3.
Gas
*Explanation:* Sound travels through solids, liquids, and gases. It travels fastest in solids, slower in liquids, and slowest in gases.
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✔ Final Answers:
1.
Sound
2.
Vibrations
3.
Pitch
4.
Frequency
5.
Vacuum
6.
Loudness
7.
Hertz
8.
Decibel
9.
Noise
10.
Sound level meter
11–13.
Solid,
Liquid,
Gas
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Parent Tip: Review the logic above to help your child master the concept of sound worksheet.
