The+Bounciest+Ball

= Doe **s changing t**he amount of borax used affect how bouncy a home made polymer ball will be? =

By Jarred and Kourbyn =  __Task 1: Answer these Questions__  = 1. What kind of reaction is mixing cornflour, borax and glue together? It is a chemical reaction between the borax and the glue. Borax makes chains of molecules with the glue molecules. The molecules stay together when you pick it up. Conflour holds this together.

This link will help you answer this question: [|bouncy ball reaction]

2. What is a polymer polymer is made up of many many molecules all strung together to form really long chains ==  __Task 2: List your independent, dependent and controlled variables:__  ==

__1. Idependent variable:__

change amount of borax added each time

__2. Dependent variable:__

Height of bounce

__3. Controlled variables:__ • same amount of cornflour • same amount of water • same amount of white glue • same size beaker • same amount of glow in the dark powder

= Task 3: What is the hypothesis for your experiment that the ball will not bounce really high. =

=  __Task 4: What equipment do you need for your experiment?__  =
 * 1) 2 cups
 * 2) 120ml of warm water
 * 3) 1 teaspoon of the borax powder
 * 4) 1 tablespoon pva glue
 * 5) 3-4 drops food colouring

=  __Task 5: List all steps in the method of your experiment (try and include a diagram or video that helps explain)__  =
 * 1) Label one cup ‘Borax Solution’ and the other cup ‘Ball Mixture’.
 * 2) Pour 120ml of warm water into the cup labeled ‘Borax Solution’ and 1 teaspoon of the borax powder into the cup. Stir the mixture to dissolve the borax.
 * 3) Pour 1 tablespoon of glue into the cup labeled ‘Ball Mixture’. Add 3-4 drops of food coloring, if desired.
 * 4) Add 1/2 teaspoon of the borax solution you just made and 1 tablespoon of cornstarch to the glue. Do not stir.
 * 5) Allow the ingredients to interact on their own for 10-15 seconds and then stir them together to fully mix.
 * 6) Once the mixture becomes impossible to stir, take it out of the cup and start molding the ball with your hands. The ball will start out sticky and messy, but will solidify as you knead it. Once the ball is less sticky, continue rolling between your hands until it is smooth and round!

__**Task 6: Observation and dis**cussion__

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?