Week 19, Day 4: When you walk with purpose, you will meet DENSITY?
EVEN BLOCK PERIODS. Finished Astronomy and began the density unit.
We barely started the Density and Buoyancy unit today. I started by having the kids toss around a large piece of Styrofoam.
Next I pass around 2 tubular pieces of metal. One is a large aluminum rod and a slightly smaller iron rod. The smaller iron rod is over 2.5 times heavier than the aluminum rod.
That was fun. Kids get a kick out of this.
Now I pass around 2 iron spheres of equal weight, one has a large volume and the other has a smaller volume. The larger one feels lighter due to more surface area. You can buy these at TEACHERSOURCE.COM. I then place each of the spheres in a water bath and then discuss why one floats and one sinks.
During this we talk about size compared to weight. Things that are bigger than their weight feel light and have low density. Things that are smaller than their weight feel heavy.
Finally we get out a small bowl with a centimeter of water in it. We place a penny in the bowl. It sinks. Then I pass out an aluminum Japanese Yen coin to each student and they carefully place it on the water and it floats. COOL.
DENSITY IS NOW COOL! YES! THEY DON’T EVEN KNOW I TRICKED THEM INTO A FUN BEGINNING TO A POTENTIALLY SCARRY UNIT.
The title of today’s blog was a misread quote from an inspirational poster. The poster read: WHEN YOU WALK WITH PURPOSE YOU WILL MEET DESTINY.