OOBLECK!

Today was Day 2 of our OOBLECK! lesson.  We were able to finish the story of Bartholomew and the Oobleck!  Please be sure to ask your child about Bartholomew and what the story was about.  We were able to experiment in Science by making our own Oobleck!  I am putting the recipe at the bottom of this post in case you would like to make Oobleck at home.  It was really cool for the students to see how it can feel like a solid at times and at other times feel like a liquid. 

What You Need

• water
• corn starch
• food coloring (optional)(we use green, to match the book)

Here's How:

1. Mix 1 part water with 1.5 to 2 parts cornstarch. You may wish to start with one cup of water and one and a half cups of cornstarch, then work in more cornstarch if you want a more 'solid' oobleck. It will take about 10 minutes of mixing to get nice homogeneous oobleck.
2. Mix in a few drops of food coloring if you want colored oobleck.

Tips:

1. Oobleck is a type of non-Newtonian fluid called a dilatant.
2. If you slowly lower your hand into oobleck, it will sink, but it is difficult to quickly remove your hand (without taking all the oobleck and its container with you).
3. If you squeeze or punch the oobleck, the starch particles will not move out of the way quickly, so the oobleck will feel solid.
4. Oobleck can be molded in a container, but when the mold is removed, the oobleck will lose its shape.