Science Experiment:Sound

Science experiment:

Question: What will happen to the sound if I cut the straw shorter and blow through it?

Links to research about Sound:

http://www.universetoday.com/61166/what-is-sound/

http://www.sciencekidsathome.com/science_topics/what_is_sound.html

https://www.youtube.com/watch?v=oElbMctAVlY&safe=active

Hypothesis: (What do you think will happen?) e.g. I think that…. the sound will go higher

Materials needed:

straw - scissors

Experiment (procedure):

e.g. Step 1 - Get a straw and scissors  

Step 2 - cut the straw into a triangle shape. Blow air into cut end

Step 3 - listen to the sound it makes

Step 4 - cut the straw shorter

Step 5 - blow on the cut end

Data (What happened?

Straw Length	Sound
15cm	the sound was annoying
10 cm	Sound was very high pitch
5 cm	This was the most high pitch one. This short straw was the annoyest sound.

Observations:   

I first cut off 3 cm  the sound wasn’t loud enough. when I cut the straw up to 7 cm the sound goes. The sound was very squeaky like we watery shoes rubbing to the ground.

Conclusion:

I have noticed the sound went higher every time I cut off 5 cm of straw.