Density Tubes Kit
Product Code: F18
Watch as two layers of beads separate and combine magically!
New Zealand Price Estimate: |
$18.95 |
Product Description
This is a very special density column. Students drop a mixture of blue and white beads into a tube, add alcohol, water and salt and . . . the beads will auto-separate. But then amazingly the two bead layers slowly move closer together to the middle of the liquid layer . . .
How can beads float in the middle of the liquid?
What part does the salt play?
Can be used over and over. Original idea by science teacher, Lynn Higgins of Polymer Ambassadors (USA).
Included: Plastic tubes with lids (6), 48 beads, special salt, instructions & worksheets

Required: Isopropyl alcohol (20 ml per tube) from hardware store
Teach: Density, Buoyancy, salting-out, miscible liquids, immiscible liquids
Age: 8+
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