Science at Bangor & in the News
After a 2 week hiatus, chemistry is back in session! This week we conducted a 3 day long experiment. We added iron nails to copper chloride salt dissolved in water. The next day, the nails and solution looked very different than when we started! We scraped off the solid produced into a beaker and let the solid and the nails dry overnight. The third day we took the mass of everything & tried to make sense of what had happened. We decided that the iron from the nails had switched place with the dissolved copper ions and wrote out the following reaction: Fe + CuCl2 --> Cu + FeCl2. After the lab, we discussed what happens in chemical reactions--atoms get rearranged. We also started exploring how reactions work in terms of conserving mass and atoms. Science 9 spent the week learning about Newton's 3rd law: "For every reaction there is an equal and opposite reaction." We did a series of demonstrations in class with pairs of students holding & pulling a spring scale (Thanks to Bloomingdale's Mrs. Wenger for loaning us the spring scales!). We could see that no matter who was pulling or who was holding, the scales always read the same amount. We used this as a basis for drawing out how the forces balanced out in force diagrams. Next week we will be wrapping up the material for this unit & then we will be on to a fun project. Stay tuned for the project announcement!
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Ms. Lyons
Science is amazing, check it out! Archives
May 2016
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