Super Star Scientist

Greenleigh!

Scientist Greenleigh was ready with her lab coat, goggles and materials!  Her materials were:  lemon juice, vinegar, 2 bowls, 2 pennies, and a paper plate.

Experiment:  Bright as a Penny

Objective:  If vinegar and lemon juice will make a penny shiny

First, Greenleigh showed us 2 dirty, old pennies.

Next, Greenleigh put a dirty penny in a cup of vinegar and a dirty penny in a cup of lemon juice. 

We let them soak for awhile, then took the pennies out and dried them off.  Look how SHINY they are!!!

Conclusion:

Oxygen and copper make a penny dull.  The acid of the lemon and vinegar remove the oxide and make the penny shiny.