Materials required 

Glurch

  • 2 teaspoons Borax powder
  • 1 cup warm water
  • 2 cups white glue
  • 1-1/2 cups cool water
  • 2 bowls
  • Spoon

Directions:

  1. Measure 2 teaspoons of the Borax into a bowl.
  2. Measure 1 cup of warm water and pour it into the Borax powder.  Stir until dissolved. Set aside.
  3. Measure 2 cups of blue and pour it into another bowl.
  4. Measure 1-1/2 cups of cool water and pour it in with the glue – mix well.
  5. Pour the Borax and water mixture into the glue.  Mix with your hands or a spoon.

Oobleck

Oobleck is a colloid that moves from a solid to a liquid and back again. A fluid that is a little solid and a little liquid is called a non-Newtonian fluid. (A colloid is a substance that seems like it’s one but is actually two separate things. Jelly and paper are both colloids.  They clump together and are often murky or opaque such as milk and fog. Colloids will not separate when left standing, like oil and water.)

  • 1 cup water
  • 1-1/2 cups cornstarch
  • Mixing bowl and Spoon

Directions:

  1. Pour 1 cup water into a mixing bowl.
  2. Measure out 1-/12 cups cornstarch. Add 1 tablespoon cornstarch to the water, and mix it in. Keep adding cornstarch and mixing it in.
  3. When your solution gets very difficult to stir, you have Oobleck. Scoop some up with your hand, and watch how it oozes back into the bowl.  Use your fist to punch the ooze. You might expect ooze to fly everywhere – but it doesn’t.  
  4. Provide everyone with “A Tournament of Properties” worksheet.

Supporting materials 

You may want newspapers, paper towels or wipes nearby for easy clean-up. 

Time required 

30 minutes

Comments

camp STEM's picture

Always a great hands-on lab to use as a first day camp starter activity.