Friday, September 13, 2013

Work This Week

In physical science, we did 3 "Do Now's" and a bowling ball lab, and a gummy bear lab.  The first "Do Now" this week was finding the mass and volume of 3 items that were on the front table: a dice, a block, and some metal.  The second one was finding the volume of pure solid copper.  The last "Do Now" was to explain what a "variable" in a science experiment is, which had a few different answers.

The Gummy Bear Lab we did was fun.  My group with Colin had a red gummy bear, the length of 2 centimeters, the height of 1 centimeter, and the width of 1 centimeter.  The volume was 1.3 mL and the mass of the gummy bear was 2.34 g.  The final density was 1.95 g/mL.  We let our gummy bears soak in water over night, to see the difference.  My hypothesis was that I thought that if we left the gummy bear in water, the gummy bear would get all mushy and lose some density, then float to the surface because the gummy bear would probably sink.  Then the next day when we checked our gummy bears, they were completely dissolved in the water, and the water turned a lighter color of whatever color the gummy bear was.  We think that they dissolved completely because it was so hot over night that they just melted because it was in the 90's F°.  We might try the lab again by putting the gummy bears in over night on a cooler night to see the actual outcome.

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