What is Oobleck?

                     

Making Oobleck is a perfect activity when studying Matter because it presents characteristics of a liquid and a solid. Plus, it's an EASY, MESSY, and FUN activity which kids LOVE!

But, what is Oobleck???

Scientists call Oobleck a non-newtonian fluid because it acts like a liquid when you pour it but it acts like a solid when a force acts on it.

Materials 

• measuring cup
• 1 cup water
• 1 1/2 cups cornstarch
• food coloring (few drops) - optional
• spoons/mixing sticks
• plastic containers
• small zip-lock plastic bag
• old clothes or aprons (suggested)
• plastic tablecloth or other covering (suggested)
• warm water and paper towels (for clean-up)
• other cleaning supplies as needed

You may need more cornstarch or water than what is listed above. 

Directions

• Review the states of matter especially liquids and solids.
• Have children observe and discuss the materials needed for the activity.
• Pour the cornstarch into the bowl. Observe.
• Add the water slowly, stir, and mix. Observe.
• Students can finish mixing the Oobleck with their  hands.
• Have students describe how it feels and discuss its characteristics.
• Try to pour the Oobleck into another container.
• Students could store the Oobleck in a plastic bag to use later.
• Wash all containers, utensils, hands, etc. 
• Do NOT put any Oobleck in the drains!

Follow-up

• Read Bartholomew and the Oobleck by Dr. Suess.
• Compare and contrast the Oobleck in the book to the Oobleck the kids made.

 

             

Extension Activities

Other similar substances to experiment with are slime and silly putty.

Here's a link to the Saugus, MA Public Library and their Silly Putty Saturday Science Activity.
Click here: Children's Services Saturday Science


Science Bob has 2 recipes for Slime on his website.
Click here: Science Bob Slime Recipe 1

Click here: Science Bob Slime Recipe 2

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