Day 31 – Using a Triple Beam Balance

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Science 8 – Today we needed to measure the mass of eggs for the start of our Eggsellent Osmosis Lab.  I borrowed a set of triple beam balances from another teacher and she warned that some of them were not working. It turns out that none of the balances were able to be balanced using the adjustment screw.  It was pretty frustrating…  until the students themselves figured out strategies for a work around.  Lots of groups noticed that they could zero the balance with a small mass, and the later subtract the mass from the egg’s mass to get a resultant measurement. Other groups need some help figuring this out but still managed to use the balances correctly. It was pretty nice to see.

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