The document describes how to make and the properties of oobleck, a non-Newtonian fluid made of 20% water and 80% cornflour. It becomes solid when force is rapidly applied but flows like a liquid when force is gently and slowly applied due to the tangling and sliding of starch molecules. Quicksand is also a non-Newtonian fluid that behaves similarly to oobleck, trapping anything struggling in it by solidifying around them, so one must move slowly to escape and have help from others given their lower density than sand.

2. What to do?

3. What you need? The experiment 20%water 80%corflour We realise a non newtonian fluid

4. Cold temperature Ambient temperature

5. When you hit the oobleck it is solid When you move slowly it is fluid

6. Cornflour is a polymer composed of starch molecules. When the oobleck is solid when the oobleck is liquid Molecules tangle molecules slide against one another

7. Quicksand is a non newtonian fluid It is a dilatant fluid like the oobleck Although sand grains are much larger than molecules of starch, starch molecules are quite large and quicksand may react very much like the oobleck.

9. If you struggle you solidify sand all around you and you are trapped, so you have to move slowly and you need someone to help you to get away. In every way, as you body is twice less dense than sand you can not drawn yourself , you will float in quicksand.