Clean Pennies With Vinegar
It's easy and fun to do
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.
Will the pennies get clean if you put them in the salt and vinegar mixture
If you put the pennies in vinegar then they will get clean.
*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.