Monday, November 7, 2016

Magnetic Slime

Science Experiment of the Week:


               
Magnetic Slime
By Kali Gipson
Supplies:
  • 8oz. Bottle of school glue
  • Borax(laundry section of grocery store)
  • Large mixing bowl
  • 9oz. Plastic cup
  • Measuring cups and spoons
  • Zip-lock plastic bags
  • Iron fillings
  • Neodymium magnet
  • Water
  • Spoon
  • Dinner plate
Instructions:
  1. Empty the entire bottle of glue into the bowl
  2. Fill the empty bottle nearly full with water and shake it up to recover remaining glue
  3. Pour the water and glue solution into the bowl
  4. Add a generous amount of iron filings to the glue mixture and stir thoroughly with a spoon
  5. Measure ½ a cup of warm water and pour it into the cup
  6. Add a teaspoon of borax to the water and stir until completely dissolved
  7. Add the borax solution to the glue mixture
  8. Mix the borax and glue solution together completely (it is safe to use your hands)
  9. Bring the magnet close to the surface of the slime and watch it spring up and grab it.

How It works:
Sodium tetraborate is the chemical in borax that reacts with the polymers of the glue to create a putty-like material. This process is called cross-linking. The iron fillings cause the slime to be magnetic.
Source:
www.stevespanglerscience.com

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