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Thursday, 13 August 2015

Creating Pitch

In our Science topic - Sound, we have been learning about pitch.
Higher pitch is caused when sound waves move through the air causing FAST vibrations.
Low pitch is caused when sound waves create SLOWER vibrations.

We experimented creating different pitch - using various objects. eg; we filled jars of water and hit them with a spoon to create lower, higher and highest pitch.

We used cardboard boxes and rubber bands at different tensions to create different pitch. And we hung up tins and filled them with water. Did you know ... the more water you put in a tin - the LOWER the pitch! Most of us predicted it would make a higher pitch!

We even created the song 'Mary Had A Little Lamb" - this was very challenging, but some of us did it!

We also made plastic cup telephones. We discovered, if you attach two plastic cup together with string, and pull the string tight ... the vibrations of our voice travel through the sting, right to the ear of our buddy! We even heard our buddy WHISPER to us from about 10 metres away! It really works ... you have to try it!!!

1 comment:

  1. Cup telephones, what a great idea! Exploring sound looks fun.