Question: What will happen to the sound if I cut the straw shorter and blow through it?
Links to research about Sound:
Hypothesis: (What do you think will happen?) e.g. I think that….The sound will go up. It’ll go a little bit higher every time I cut the straw shorter.
Materials needed: A straw and scissors.
e.g. Step 1 - Crease straw on one end.
Step 2 - Cut creased straw into triangle shape. Blow air into the cut end.
Step 3 - Listen to the sound it makes. Record it.
Step 4 - Cut straw shorter.
Step 5 - Blow on cut end. Listen and Record.
Data (What happened?)
Made a sound.
The sound was higher.
The pitch was even higher.
Observations: At first, it didn’t make a sound, but then I gently blew on it, and it straight away made a sound. For every piece of straw I cut off, the pitch got higher, and squeakier. It sounded exactly like a birthday party horn. Even though there were two materials needed, it was pretty complex.
My hypothesis was right because the sound went a little bit higher every time I cut the straw shorter.