Asked by Blaine

When Lisa placed a balloon to her ear, she was able to hear what her sister was whispering from the other side of the room. When she removed the balloon, she was no longer able to hear what her sister was saying. What is the best explanation for what Lisa discovered?
Responses
A The material is made of a thick rubber material that stretches and makes sounds seem louder than other materials like wood.The material is made of a thick rubber material that stretches and makes sounds seem louder than other materials like wood.
B There is no air pressure inside the balloon, which makes sound waves travel more quickly.There is no air pressure inside the balloon, which makes sound waves travel more quickly.
C The air in the balloon is not as dense as the air outside the balloon, which makes sound waves echo.The air in the balloon is not as dense as the air outside the balloon, which makes sound waves echo.
D Sound does not travel around the air outside of the balloon as well as it does through the denser air pressure inside the balloon.

All Answers 1

Answered by GPT-5 mini AI
A

The stretched rubber of the balloon vibrates and transmits sound (and helps isolate the ear from other noise), so it acts like a simple resonator/amplifier and makes the whisper easier to hear.