1. you are listening to music in your room and you are asked to turn down the volume of your music. when you turn down the volume, what will happen to the sound waves' amplitude? (5pts) 2. some animals communicate by emitting low frequency sound waves. when the animal emits a low frequency sound wave, what is the resulting pitch? (5pts) 3. your friend tells you they think it would be cool to have band practice on the moon. is it possible to hear the band play on the moon? why or why not? (5pts) 4. you have a frustrating day and just feel like screaming; you grab a pillow to scream into it. which interaction of sound would take place here, (reflection, refraction or absorption), and how did the sound waves move? (5pts) 5. you are exploring in a cave and call out to one of your friends. you hear your echo. which interaction of sound (reflection, refraction or absorption) caused the echo and how did the sound waves move? (5pts) 7th grade science! need now! giving 15 points! thats a lot!

1).  Lower sound volume means lower wave amplitude.

2).  The pitch of the sound we sense is directly connected to the frequency.
Low frequency is perceived as low pitch.

3).  It is not possible to hear the band play on the moon.  Sound needs
something to travel through.  When we hear sound, it is most often traveling
through air.  There's no air on the moon, so you can't hear any sound, even
if it comes from right next to you.
I can see another big problem on the moon ... it would be kind of hard to
get your guitar, or the mouthpiece of your trumpet, inside your space suit.

4).  From your mouth to the pillow, the sound waves travel through air. 
When they reach the pillow, the waves are absorbed by the cloth and the
feathers, and they don't go anywhere else.  So nobody hears you scream.

5).  The sound waves travel through air, as always.  When they reach a
hard surface, like the rock wall of a cave or even the wall of the gym in
your school, the waves bounce off of the wall and continue moving, but
in the opposite direction.  The bounce is called 'reflection', just like light
bouncing off of a mirror.  When the sound waves return to you, you hear
them, and it sounds like your own voice again.  You call it an "echo".

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60.0 - there are 3 significant numbers