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.

Experiment