Oobleck gets its name from the Dr. Seuss book Bartholomew and the Oobleck where a gooey green substance, Oobleck, falls from above to create chaos in the kingdom.
This version of Oobleck is an example of a non-newtonian fluid. This means it acts like a liquid when being poured, but like a solid when a force acts upon it. You can grab it and then it will ooze out of your hands, but if you poke, pinch or punch it, it will behave like a solid. Make enough Oobleck and you can even walk on it!
First, read about Barthlomew's adventure's. Then, make some oobleck of your own!
This activity helps to learn about measuring with different measuring instruments. Count as you add the drops of food coloring. And explore how the Oobleck behaves. For more fun make some glitter goo and compare it's behavior to the Oobleck.
Prep time:3 minutes
- 1/2 cup water
- 3/4 - 1 cup cornstarch
- Food coloring, optional
- Measuring cup
- Liquid measuring cup
- Table knife
Step 1. Learn to use a dry measuring cup
Measure the cornstarch with a dry 1 cup measuring cup, tapping and smoothing the starch with a table knife. Place it in the bowl.
Step 2. Learn to use a liquid measurig cup
Measure the water usig the liquid measuring cup. Look at the meniscus line from the side for an accurate measure.
Step 3. Mix the Oobleck
Add the water little by little to the bowl of starch. Stir with the fork as you add the water.
Add food coloring if desired.
If it is too runny, add more starch.
If it is too thick, add more water.
Play and observe the Oobleck!
Directed observation ideas:
Try to hold the oobleck in your hand. How does it behave?
What happens if you squeeze it tight in your hand?
Poke the oobleck in the bowl with your finger. What happens?
What if you punch it with your fist?
Place a paperclip on the surface. What happens?
Place something heavier on the surface? What happens?