Hi everyone! Thanks for stopping by :) If you didn’t get a chance to sign in, here’s the link to our spreadsheet: Click me! A PDF download of our meeting slides is available here: http://www.mediafire.com/?dqvd9wibv1puue4
At this meeting, Marcus, Cynthia and Frances gave an overview of Science Club activities and presented short demonstrations related to chemistry, physics and biology.
Marcus’s experiment changed copper pennies into silver and gold–or so it seemed. The materials he used were copper pennies (made before 1982), zinc sulfate, and a few strips of zinc metal. Zinc ions plated onto the pennies to turn them a silver color. Then, when he heated them, the zinc formed an alloy with the copper, making brass, which is gold-colored.
Cynthia demonstrated the creation of a simple electric motor from batteries, neodymium magnets and copper wire.
Frances gave a presentation inspired by paleontologist Neil H. Shubin’s article in Scientific American, “This Old Body.” She talked about vestigial features of the human anatomy, including the evolutionary explanations behind hiccups (a remnant of our descent from fish and amphibians), Darwin’s Point, goosebumps, and what remains of the third eyelid in humans.
Be sure to come back next week, when we present and answer questions regarding competition opportunities. Come meet the rest of the officer team, Alexandra and Kunal, who will be back from their national math and debate competitions!