Density of soap

Monday was day one and was used as an overview of the course pillars: science as an experimental endeavor, physical science as being built on mathematical models, and writing skills. Wednesday I introduced space, time, and matter. Energy was given only passing mention. 


Variables, dimensions, and metric units were covered briefly. Then density was introduced.

Following this a series of density calculations were done on metal cubes and a wood cube. The density of water was estimated using a 303 gram 1000 ml beaker that was filled to the 900 ml line. This would turn out to be 875 grams of water for a density of 0.97 grams per cubic centimeter. Or about one gram per cubic centimeter.


Laboratory on Thursday led off with the algebraic rearrangement into a direct linear relationship. At 8:00 I would suggest that the y-intercept ought to be zero, and would have the students go ahead and include a y-intercept in their regression to test whether this was close to zero. I ran calculations on two chunks during the demonstration. During the lab session I measured three more soap chunks to have five to work with later in the session.

Mersayes, Ashlen


Jonathan, Sharla

K-con, Halia Edward, Ashalina Lebehn

Jarret and Athina

Soap carvings confirming that Ivory soap floats


In the 11:00 session I only generated two measurements, I did not return to that chunk of soap. I also added an outline of the laboratory report seen on the right side. I chose to let the issue of the y-intercept slide in the 11:00 section and focus on the simpler direct relationship. The 11:00 section had significantly more students than the 8:00 section.

Polly Melina records while Billy measures

Milain carving the soap

Fiji, Rizal, Harvey

Ozimy, Jack, Serjeann, Shane, Kaylem, Ican

The computer and large screen television at the back were used to demonstrate Desmos and setting up a laboratory report. 

Serjeann and Shane record data

Jack, Ozimy

Ivan and Kaylem


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