Alice_:_Communicates_Really_Paul,_you_think_thats_interesting__Paul'>Alice_:_Hello_Paul._Paul_:_Hi_Alice,_hi_Michelle._Michelle'>Section 3
Alice
: Hello Paul.
Paul
: Hi Alice, hi Michelle.
Michelle
: Hi Paul, where are you going with all those books?
Paul
: Well I'm preparing for my marine studies paper.
Alice
: Really what are you doing your paper on? I haven't even started mine.
Paul
: Well since I've always been interested in communication, I wanted to
take a closer look at how aquatic animals communicate.
Alice
: Communicates? Really Paul,
you think that's interesting
?
Paul
: Well yes Alice. Actually it's been much more interesting than I had
expected it would be. I'm finding the information fascinating. I bet you'd be
surprised at some of the things I've learned
Michelle
: Yeah, like what?
Paul
: Well
much of the world
is covered by water, but it wasn't really until
the first third of the 20th century that people even began to explore the depths
of the ocean.
Prior to
its exploration,
scientists just thought of it as a
completely silent world
. Of course today, we know it is full of sounds.
Alice
: Such as?
Paul
: Well all kinds of living things in the ocean from prawns to whales call
back and forth to each other.
Michelle
: How do we know that prawns talk to one another?
Paul
: Good question. The answer is we listen to them. How scientists do it
through a special device called the hydrophone. Now what a hydrophone does
is convert to sound energy into electrical energy. It's a very clever device.
Alice
: Kind of like a water telephone?
Paul
: Well yes.
Quite like that except the communication is only one way
.
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