Thursday, 8 May 2014

Science experiment

Science experiment:

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 as I cut the straw shorter while blowing it, it will sound higher.

Materials needed:
Drinking straw
A pair of scissors

Experiment (procedure):
Step 1 -  Crease straw 2 to 3cm on one end

Step 2 -  Cut creased end into triangle shape and blow air

Step 3 -  Listen to the sound it makes and record

Step 4 - Cut  the straw shorter

Step 5 -  Blow on cut end listen and record

Data (What happened?)
Makes a deep/low sound
Sound was higher
Sound was more higher pitched

The table above shows that when the straw was 15cm it was deep and low pitched. As I cut it shorter and made it 10cm long it was higher pitched. Finally when it was 5 cm the pitch was more higher than ever.

In the end my hypothesis was right. The sound became higher pitched as the straw got shorter. You should try this some time. I hope will be doing more exciting experiments like this during the term.

1 comment:

  1. Hi Jordan,
    I really enjoy reading this.
    Keep it up and I will love to see more of these. :)