Outstanding+ooblek

= = = = = = = = = Does chan **g**ing t **he** am **ount of cornflour in th**e recipe affect the viscosity of the ooblek? =

By Vianca and Evannie - upload a picture of you and your buddy here

__Task 1: Answer these Questions__
__ 1. Why does mixing cornflour or cornstarch with water make a mixture that is sometimes a liquid and sometimes a solid? __ Ooblek is what is called non-Newtonian liquid. Most liquids are called Newtonian liquids - they flow the same even if we put force on them. If we put force (like poking or rolling) on a non-Newtonian liquid, its viscosity becomes greater or bigger. That means it flows slower, it gets thicker and more like a solid. When we take the force away, its viscosity gets less and it becomes more like a liquid.

__ 2. What is viscosity? __ Viscosity means the thickness or how thin a liquid is - if something flows fast it has low viscosity. If something flows slowly it has more viscosity.

__3. What are some other non-Newtonian liquids you may find around the house?__ ketchup,shampoo,custard and toothpaste.

==  __Task 2: List your independent, dependent and controlled variables:__  ==

__1. Independent variable: the amount of cornflour we put in__

__2. Dependent variable: viscosity__

__3. Controlled variables: Water.__

=
__Task 3: What is the hypothesis for your experiment? The more cornflour that we put in, it will turn really thick.__ =====

=
__Task 4: What equipment do you need for your experiment? Cornflour,Bowl,Water,Spoon,Food Coloring, And Measuring Cups.__ =====

=
__Task 5: List all steps in the method of your experiment (try and include a diagram or video that helps explain): Step1: Put the cornstarch in the bowl and put the water. Step2:Put some food coloring and mix it.__ =====

__**Task 6: Observation and discussion**__
Note down what you noticed as you did each experiment. Try and include an image or a video or photos of your experiment.

__Experiment 1 Observations:__

__Experiment 2 Observations:__

__Experiment 3 Observations:__

__Task 7: Results__
Take a screen shot of your results table. Upload it and put it here:

__Task 8: Conclusion__
Write a statement that says whether your hypothesis was wrong. If you were wrong, why were you wrong?