Question

While hiking a mountain, Gwen called out, “Yoohoo!” She then heard her own voice say, “Yoohoo. Yoohoo. Yoohoo.” What happened?
A
The sound was completely absorbed by the mountain.

B
The sound reflected back to Gwen as an echo.

C
The sound was completely carried through the mountain away from Gwen.

D
The sound didn’t travel as a wave at all.

Answer 1

The correct answer is B: The sound reflected back to Gwen as an echo. When Gwen called out, the sound waves of her voice traveled, hit surfaces (like the mountain), and bounced back, allowing her to hear her own voice repeat.