Clean Pennies With Vinegar
It's easy and fun to do
Directions
First , you mix the vinegar an the salt together,
Then, you put 5 pennies in the bowl and count to 10 slowly,
Finally you wash the pennies of with water.
Question/problem
Will the pennies get clean if you put them in the salt and vinegar mixture
Hypothisis
If you put the pennies in vinegar then they will get clean.
Materials
*A few old, not so shiny pennies
* 1/4 cup of white vinegar
* 1 teaspoon of salt
* Non metal bowl
* Paper towls
Control Group ( something that is constant or unchanged )
Something that is not changed is the * Amount of vinegar
* Amount of salt
Independent Variable ( something you change )
Something that you can change is put a little bit more vinegar and see if the pennies get cleaner.
Dependent Variable ( something you measure )
You measure how clean the pennies get.