_____________________________________________________________________________________How To Easily Make Oobleck: 

Step #1: Cornstarch + Water. Generally it's a 2:1 ratio (2 cups cornstarch and 1 cup of water). 

Step #2: Mix Together. That’s really it.

Step #3 (Optional): Add food colouring.

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How does it work? 

When playing with Oobleck, students should notice that solids usually have a shape, while liquids can change shape because they flow.

Oobleck is special because it doesn't always act like a regular liquid. It's a non-Newtonian fluid, which means it doesn’t follow the normal rules for liquids. When you hit or squeeze it, Oobleck turns into a solid.

A non-Newtonian fluid is a liquid that changes how it acts when you apply force. For example, ketchup gets runnier when you shake it, which makes it a non-Newtonian fluid.

The reason Oobleck behaves this way is because of the shape of cornstarch particles. These particles are long and thin. When cornstarch mixes with water, it doesn't dissolve, it stays in suspension. When you move the mixture slowly, the particles slide past each other. When you move it quickly, the particles tangle and the mixture becomes solid.

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Fun Fact about Oobleck: It’s technically edible but probably won’t taste too good!

Using a material like Oobleck helps explore the difference between solids and liquids.

~ Written by Alina