Carol Boswell Simpson wrote:
>
> Hi,
>
> This is probably the oldest shell question in the world, but I'm giving a
> program to 4th graders tomorrow and I know they'll expect a reasonably
> intelligent answer.
>
> Why do we hear "the ocean" when we put a shell up to our ear?  Is it the air
> inside the shell vibrating on our eardrum?
>
> Would appreciate a response.
>
> Thanks,
>
> Carol
Do you know you can hear the ocean if you put a cup over your hear?