More Answers

www.ask.com/business-finance/causes-pennies-dirty-a5f49695bbd26892

The dark brown color of a penny is most likely oxidation, which occurs when the copper in the penny comes in contact with oxygen. Since the average penny circulates for 25 years, a...

How Do Pennies Get Dirty? | eHow

www.ehow.com/facts_7344498_do-pennies-dirty_.html

Dirty pennies have a variety of causes. penny graph image by RT from Fotolia. com. There are currently over 130 billion pennies circulating in the United States.

Copper & Kids - Copper Experiments

www.copper.org/education/Kids/copperandkids_cuexperiment.html

10 dirty pennies; 4 tablespoons lemon juice; 8 tablespoons vinegar; 1 teaspoon salt; small bowl (not metal!) 1 spoon (not metal!) paper towels or napkins ...

How do pennies get so dirty - Answers

www.answers.com/Q/How_do_pennies_get_so_dirty

Yes, the tarnish is copper oxide. But actually the tarnish is not from when the pennies are made (brand new pennies are shiny); the tarnish is from the copper of ...

Cleaning Pennies From 1950's - Finishing

www.finishing.com/80/18.shtml

In October---, you said that today, pennies are copper plated zinc. ... And also what causes them to get dirty and what is the dirty stuff on the surface of the penny ...

Project on cleaning pennies - Finishing

www.finishing.com/175/93.shtml

Oh, I have one more question, what actually causes pennies to get dirty? THANKS A BUNCH FOR YOUR HELP! Kalyn [last name deleted for privacy by Editor]

www.ask.com/youtube?q=What Causes Pennies to Get Dirty&v=kufXLB1GF94
Nov 6, 2012 ... Clean all your dirty cents or any copper metal using vinegar and salt Music: ... I'm sure you can get more than 2 antique pennies from the jar.

From Dull to Dazzling: Using Pennies to Test How pH Affects ...

www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p090.shtml

Pennies are bright and shiny when they're new, but become quite dull with time. What causes such a drastic change? Oxygen in the air ..... GET INVOLVED.

Penny Experiments - Lettice Bell

www.letticebell.com/experiments/PENNIES.PDF

How many pennies can you put in a full glass of water? ... 20 dirty pennies .... Heat causes objects to expand (get bigger), while cold causes objects to contract  ...

Penny Tarnish Reverse Projects | The Classroom | Synonym

classroom.synonym.com/penny-tarnish-reverse-projects-13067.html

Because pennies are made of copper, they don't actually rust. ... What Causes Copper to Tarnish? How to Get Tarnish Off of a Gold Necklace · The Do's & Don' ts of Buying Penny Stocks · What Are Penny Stocks, ... the salt it reacts to remove the copper oxide -- the cause of their dark and dirty appearance -- ...

Popular Q&A
Q: T think, i really have no idea, some people tell me i have movie ...
A: Well i agree with the first answer you do sound a little full of yourself, but I think girls might think your too into yourself and not into them. As we all kno... Read More »
Source: answers.yahoo.com
Q: What cause your eye to get darker and dirty looking?
A: The area around your eyes may appear darker because of lack of sleep which causes darkening around the eyes.  It may also be staining do to makeup. Read More »
Source: www.helpfulbox.com
Helpful Resources

Science Activity: Turn Old Pennies Bright and Shiny! | Exploratorium

www.exploratorium.edu

20 dull, dirty pennies; 1/4 cup white vinegar; 1 teaspoon salt; A clear, shallow bowl (not metal); 2 clean ... How did the nail and the screw get coated with copper?

Dirty Pennies | Experiments | Triunfo

triunfo.colostate.edu

Dirty Pennies. Students prepare to oxidize pennies! Background Information. Have you ever seen a penny that was so dirty it was black or green instead of ...

Chemistry cleans pennies! - Planet Science

www.planet-science.com

Pennies get dull and dirty because the copper in the pennies reacts with oxygen in the air to form copper oxide. When you put your pennies in a vinegar and salt ...