Friday, May 9, 2014

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:
Hypothesis: (What do you think will happen?) e.g. I think that….
I predict that the straw will go in a high pitched sound when we cut it.
Materials needed:
Scissors and Straw
Experiment (procedure):
e.g. Step 1 - Crease the straw  2-3m long on one end

Step 2 - Then using the scissors again cut the end of the straw into triangle 1.5 metres long.

Step 3 -  Put your lips just over the cut end of the straw (triangle part)

Step 4 - Squash the straw softly with your lips, blow through it

Step 5 - Cut the straw shorter and see what it will sound like

Data (What happened?)

15cm Long Straw -
It just made a low squeaky sound
10cm Long Straw -
The sound went a little higher
5cm Long Straw -
The sound went really high pitched

When the straw was 15 cm long, it just went into a squeaky low sound. But I have just discovered that every time you cut the straw shorter the sound goes higher and higher.


When you cut the straw it goes into a high pitch. So my prediction and my hypothesis was correct. It did go into a high pitched sound.

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