Density of soap

On Monday I introduced the course learning outcomes and some of the themes of the course. 


Forgotten this term: to pick up a kilo of sugar for the class to experience a kilogram.


On Wednesday I covered space, time, matter, energy, variables, and metric units of measure. This was followed by density calculations for the usual variety of objects. 


Calculations included the density of water


Measuring soap and making calculations. The morning session had sinking Ivory soap, only the Jergens soap had an actual density less than one. The Ivory soap was known to be old, and research done a decade ago showed that soap loses mass even when not being used. The loss in some soaps might be volatile oils, but Ivory is pure soap. Whatever did occur with the Ivory, the soap sank. 


More soap will be needed for spring term, but soap should be purchased on as needed basis to avoid the issue of the soap becoming older and harder to cut. The Spa Naturals coconut soap simply crumbled rather than cut. Above two teams cut soap and record data. 

Gabby measures the soap while Fumie-Kate records data


Emylia makes calculations

Recording data



Measuring the soap

Massing the soap

Five measurements of mass and volume are made

Joann and Angelica along with a junior partner

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