Hi all,
Please note that the following powerpoint slides are now available on slideshare:
1. Composition of air
2. Human respiratory system
3. Plants and Fish respiratory system
4. Forces - Push and Pull
It is compulsory for everyone to download the slides, print them and file them in your science files. For those who have trouble doing so, please make a copy from you your friends.
Thanks.
Ms Tay
Wednesday, July 22, 2009
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