This is about nervous system(just intro):
www2.hci.edu.sg/y10hci0282/ns.pptx
This is about refraction
www2.hci.edu.sg/y10hci0282/refraction.pptx
These two were my science powerpoints. I did on refraction because it was the term subject and I read about the eye in the Bio textbook. For nervous system,I liked it the best out of the other systems. This is the most cool, because it involves the brain telling us what to do.
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