A string phone demonstrates how sound waves can travel through solids. Normally, sound travels through the air as vibrations. But when you speak into one cup of a string phone, your voice creates vibrations that travel along the string to the other cup. The string acts as a medium for the sound waves, allowing your friend to hear you even from a distance!
The tightness of the string is important. A taut string transmits vibrations more efficiently than a loose one. This is because the molecules in a tight string are closer together, allowing them to pass the vibrations along more easily. This simple activity makes a great visual for understanding how sound works! 👂
Match the term with its correct definition:
| Term | Definition |
|---|---|
| 1. Vibration | A. A disturbance that travels through a medium. |
| 2. Sound Wave | B. How high or low a sound is. |
| 3. Medium | C. A rapid back and forth movement. |
| 4. Frequency | D. Material through which a wave travels. |
| 5. Pitch | E. The number of waves passing a point in a certain time. |
Fill in the blanks with the correct words from the word bank: vibrations, string, sound, air, cups.
A string phone works because your voice creates ___________ in the ___________ that then travel along the __________ to the other ___________. This demonstrates that ___________ can travel through solids.
Why does a tighter string work better than a loose string for a string phone? Explain your answer.
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