Students used balanced scales to weigh objects by balancing them with the same weights. The purpose was to compare the weights of the objects to work out which side was heavier or lighter and how to make the scale the same weight on both sides.
By working in small groups everyone had to problem solve, listen to their group members and trial different possibilities.
After understanding how the balance scale worked, Room 14 created their own balance scale using a coat hanger, some yarn and two cups. Students explored and experimented with a range of weights. They made observations about how well their balance worked. They shared ways to improve their balance scales.
When the cup has more felt-pens, it is heavier than the other. One hanger will tip to the heavier side due to the extra weight in that cup.
I am putting the yarn through the holes of the cups so that I can hang the cups on the hanger.
I try to put the lego blocks slowly into each cup until both sides are equal.
I use the ruler to measure the same length of the yarns to hang two cups so that the two cups have the same weight as the yarns.
I tie the knots at the same position on the cups, so when I hang them up on the hanger, they balance.
I know a balance scale can measure weight. When the weight of two items is equal, the scale will remain level.
I am trying to punch the holes in the same positions on the cup so that it can be balanced.
We put more plastic rods in one cup than another, so one side is heavier with more rods in it.
We hung the balance scale around the classroom and put crayons in for testing and tried to make it level.
Charlotte and Hazel If I put more in one cup it won’t be the same level. It causes one to go down and one up, because there’s too much in here.
When there is nothing in the cups, it’s going to be the same weight.
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