We have been learning about sound and how it travels. We learnt that sound is started by the vibration of something such as a bell. The vibrating bell makes the air around the bell vibrate as well, and it keeps vibrating out in waves until it hits our ears. The waves are a bit like dominoes, a Mexican wave or when you pulse a slinky. The air particles don't move position they just vibrate and cause the particles next to them to vibrate. We looked at how a speaker works and how the cone vibrates which vibrates the air between the speaker and our ears. We then did this experiment which shows how sound vibrates whatever is in front of it - in this case, different liquids.
Thursday 31 October 2013
Monday 21 October 2013
Friday 18 October 2013
Clearing and planting day!
Clearing and planting day on PhotoPeach
An awesome effort today guys. Great to see many of you taking initiative and putting in some consistent hard work. Well done. We planted a few hundred trees and made the area look much better. A few years down the track and it will look really well developed - awesome work. Your community and environment is better from your efforts today. A massive thank you to all those parents that helped and also those that donated plants.
An awesome effort today guys. Great to see many of you taking initiative and putting in some consistent hard work. Well done. We planted a few hundred trees and made the area look much better. A few years down the track and it will look really well developed - awesome work. Your community and environment is better from your efforts today. A massive thank you to all those parents that helped and also those that donated plants.
Thursday 17 October 2013
Wednesday 16 October 2013
SOUND - bull roarers, bending water and sand patterns
On Monday we spent some time experimenting with bullroarers - ancient instruments and communication tools. We are looking this term at energy and in particular sound energy. We explored the questions - what makes the bullroarers produce sound? What changes the kinds of sounds it produces? Why did some of the bull roarers not work? It was lots of fun and has got us thinking about the incredible energy of sound. We also looked at these amazing videos where water is bent by sound and one where sound produces patterns in sand. Click on them to view.
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