Asked by swimmerGirl

Astronauts who are working outside the space shuttle require an audio speaker in their helmets because ________.


PLEASE HELP!!!!!!
Answered by swimmerGirl
A: Space is very noisy, and they cannot hear each other

B: Sound is an electromagnetic wave and does not require a medium to travel through

C: Sound is a mechanical wave and requires a medium to travel through

D: Sound is an electromagnetic wave and has a long wavelength
Answered by swimmerGirl
those are the answer choices
Answered by swimmerGirl
I know its not A.
Answered by Ms. Sue
What have you learned about how sound travels?
Answered by swimmerGirl
I know sound needs to travel through a medium.

So is it C
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