Sep 28, 2011

Water Stacking

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     Today the kids and I did an “experiment” that involved water density. Obviously my kids are still a little young to fully understand density but they do understand heavy and light so when helping them understand I explained that the more salt added to the water the heavier it becomes. They also understand the heavy things usually sink, light things float.

What you will need:

-Salt (regular table salt)

-four clear glasses (or jars)

-spoons (something to stir with)

-food color

-measuring spoon and cup

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In glass #1 mix one drop of blue food color, 3 tbsp salt, and a cup of warm water, mix well.

In glass #2 mix one drop of yellow food color, 2 tbsp salt, and a cup of warm water, mix well.

In glass #3 mix one drop of red food color, 1 tbsp and a cup of warm water, mix well.

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     I was going to experiment with different amounts of salt but we ran out of time, so with older kids you could try different amounts of salt and compare the layers.

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     Now add the blue to the fourth jar (fill about 1/4 of the way up), then add the yellow, I used a turkey baster but a spoon will work, add yellow slowly, (fill up to about 3/4 full). Then top the jar off with the red, adding it slowly. I think our table was being bumped a little too much and the colors mixed more then I wanted.

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     When the kids got to see the final results Bean said it was a rainbow, I think they where all a little impressed. We let the jar sit for several hours and the layers slowly mixed and ended up a mucky grey color. This was a fairly quick, easy and mostly mess less project, so enjoy.

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Len

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