My Science experiment

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….

it might sound different, sounding higher if I cut It shorter

Materials needed:

straw, scissors

Experiment (procedure):

e.g. Step 1 - crease straw 2-3cm on one end

Step 2 - cut creased 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 and listen

Data (What happened?)

15cm	makes a loud sound
10cm	sound was higher
5cm	sound was more higher pitched

Observations:

When it was 15cm it made a loud sound. I cut it 10 cm shorter and the sound went higher.When it was 5cm the sound was more higher pitched.

Conclusion:

The straw sounded high pitched when I cut it shorter. My hypothesis was correct.