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Amazing 9 Layer Density Tower

Can you layer 9 liquids and 7 objects in a vase?


For years we have been making seven layer density columns. We challenged our team to not only add two more liquids, but add seven objects that would float at different levels. The outcome... the Amazing 9 Layer Density Tower!

How This Works

Brielle    -  October 24, 2011

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This user gave 4/5 stars


In chemistry and geology we found the density through d = m/v(g/ml or g/cm^3 for units). The layer with the highest density will sink to the bottom and the highest will stay on the top. All of the other layers in between will find their own way. The cool thing is without the answer for the density, the layers will situate themselves on their own and go through other layers. Food coloring is a great way to separate the different layers. Surface tension plays a role as well.

Please dispose Density Tower Demo responsibly...

Ami    -  December 16, 2010

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This user gave 3/5 stars


This is a fantastic demonstration on density. However, please dispose of Steve Spangler's Density Tower responsibly when you are finished. Never dispose of flammables, lamp oils or alcohols down the drain. Where does that stuff go? Never dispose of HAZMAT (hazardous materials) into the sewer or septic systems. Students and teachers of all ages should have a basic understanding of HAZMAT, and best practices. How would Steve dispose of this? Safe directions SHOULD be included in the demo.

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