Oxygen in the atmosphere has a negative charge that is attracted to the positive charge of the copper in the penny. If you want things to be fun and messy, you can always have your kids use their hands as long as you are happy to deal with the consequences of ketchup-coated fingers! Look for pennies made before 1982 and roughly about the same time; this way they will be more tarnished and the pennies will have similar composition. After a few minutes, remove the pennies from the bowl, and rinse them with water. (Check out some cool Brainpop, Generation Genius, or Flocabulary videos for extra background knowledge) Your class will then, :- Teacher directions- vocabulary cards- 5 written response questions- border and borderl, 7 Easy Science Experiments To Teach The Scientific Method Bundle, Fun Experiments with Scientific Investigation Bundle. salt water? Salt! First, prepare all your cups and line them up. Antique Singer Sewing Machines That Changed the Game, Although they are often found at garage sales, flea markets, and estate sales with very low price tags, there are several models of antique Singer sewing machines that are highly sought after by co, 62+ Fun Family Night Ideas and Activities You'll Want to Give a Go, Family night ideas include fun games and activities any family can enjoy together at home or in their neighborhood. Wipe the penny off with a paper towel and rinse off. This is because when the hydrochloric solution cleaned the coin and air dried it, it also took with it some of the salt. You also may have noticed that the longer the pennies stayed in the cleaning solution, the cleaner they became! 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Trust me on this. Grab a cup of coffee, some of that chocolate youre hiding from the kids, and join me as I learn, experiment, and explore with my kiddos and hopefully inspire you a little in your journey alongside smart, quirky, creative kids, too! This website is helpful to me but,add more steps and I think it can be more helpful. Oranges? In each case, make sure the penny is completely covered by the contents of the cup. 'Fun, ' link: If you enjoyed this cleaning pennies experiment, you'll love: Wow! The friction does the work. 'Balloon Powered Rocket, that looks at what house hold solutions will be best to. Place each of the pennies in the 1 minute column into their corresponding cup. The soda cleans the pennies because it contains phosphoric acid. So if you look at the coin in the vinegar solution, it made the old coin a little bit brighter and less brown. Since most pennies made after 1982 are made out of zinc with a thin copper coating, you used real copper pennies to get the true effect. Wear safety goggles to avoid splash danger. While the coins are air drying in the second stage, you can talk your kids through their findings of the first stage together! Add the salt, and stir until the salt is completely dissolved. Place the pennies in the bowl, and allow them to sit for several minutes. 'Dry Ice Bubble, ' link: Want to wow your kids with some simple kitchen science? The step-by-step instructions included in this digital product are easy to follow and are accompanied by colorful illustrations that make the . In this case, talk with the young scientist about which solutions he or she thinks will best clean the pennies. Wipe the excess ketchup off the pennies, then rinse them off. i need to know!!! Once all the pennies are in the correct cup, use the remaining time to observe the pennies, and the contents of the cup. Isnt that amazing? Experiment with even longer periods of time with each of the cleaning methods. Im not talking about the literal dirt that ends up collecting on them Im talking about the residue that is still present even if you rinse your pennies off with water. Finally, wipe the coins dry with a tea towel or kitchen paper. The students have to come up, a question, make a hypothesis, conduct an, a conclusion. Through a penny cleaning science project, you can study atoms, chemical changes and observing processes through the scientific method, all of which are science lesson benchmarks for eighth grade. follow up activities, 10 graphing activities for graphing the hypothesis. Next should either be the soda/fruit juice or vinegar (sometimes these switch depending on what type of each you have used) because their pH is usually around 3, so they are mildly acidic. Younger kids might need a bit of help. If you line up your pennies in order from the dirtiest to the cleanest, the order should go something like this: Water, Soda/Fruit Juice, Vinegar, Ketchup, and Vinegar and salt mixture. Get rid of dirt, oil, rust, and debris with a regular garage floor cleaning and maintenance routine. The salt helps speed up the reaction. Great for President's Day! Now, when copper reacts to oxygen, it turns dark brown to make copper oxide. So for the 2nd stage of this experiment, you will work on these two materials alone. Pennies are good for more than just buying penny candy. This blue-green is called malachite and copper can turn into malachite over many years of exposure to chlorine and oxygen. Mix one tablespoon of salt with half a cup of vinegar in a small container and stir until the salt dissolves. Try more solutions. The acids (usually vinegar - acetic acid) break the copper oxide free from the penny. So, the acetic acid in vinegar dissolves the copper oxide and cleans it. ), 20 Best Sensory Tables Ideas for Toddlers and Pre-Schoolers, Science Fair For Kids: The Battle of the Senses (Taste vs., solutions like ketchup and the salt and vinegar mixture, https://www.youtube.com/watch?v=WhAgQEr1LOE, Can Ketchup Clean a Penny? Did you do the 2nd stage of this cleaning coins experiment? The coins that were submerged in those cups should come out nice and shiny, while the rest are still a little dull and dirty. But, can make them shiny and new again. (Keeping the pennies in front of the cups will help you remember which solution they were each in. As they are exposed to the environment, pennies become coated with a layer of copper-oxide, making them look tarnished (dull, brown and dirty appearance). Compare all of the pennies to the control pennies. Stage 1: First, prepare all your cups and line them up. Science - Lesson 4 of 50 - Grades 4,5,6 ', ' link: All with pocket change actually. Copper oxide is what causes pennies to become dull. Step 1: Put the salt and vinegar in the bowl. Use your paper and pencil to create a table like the one below. Start with the cups labeled 1. Check it out. The lab instructions are easy to follow and provide step-by-step guidance on how to conduct the, 5-IN-1 BUNDLE (Set 1 of 10) - Grades 4,5,6, What is in this '5-IN-1 BUNDLE'? After that you won't see anything happen. Learn how to wash Rothy's shoes so your go-to flats and loafers always look their best. Leave the coins in the liquid for 10 minutes. If you have older kids, you can let them pour the soda. it does not say the date and author on the website! 20-30 dull pennies 1/4 cup white vinegar (dilute acetic acid) 1 teaspoon salt (NaCl) 1 shallow, clear glass or plastic bowl (not metal) 1-2 clean steel screws or nails water measuring spoons paper towels Shiny Clean Pennies Pour the salt and vinegar into the bowl. These boxes are presented in partnership with Popular Mechanics so you know you'll be getting some great stuff each month. A coin collector prides himself on gathering pennies, but old tarnished pennies are an eyesore to anyone's collection. The answer is pretty simple before 1982, pennies were made almost entirely from copper, and modern pennies are made of copper-plated zinc. Which method works best is determined by the amount of acid present, and the presence of salt. Step 4: Stir until the salt dissolves. 2. Begin the experiment by placing a few pennies on a small plate. Well, heres something even more fascinating. 5. Compare the penny from the ketchup to the control penny. Step by Step Procedure: There are two different stages to this Science activity. Continue observations. Density Experiment With Water Watch The Floating Egg! This outlines all of the steps of scientific investigation. My kids had fun doing this, raiding their piggy banks to find some dirty pennies. Copper oxide is blackish. Required fields are marked *. Kids will love trying their hand at the classic cleaning pennies science experiment to see if theycan use a chemical reaction to make pennies shine brightly once again. PRINT AND GO STEM BUNDLE. Put a dollop of ketchup on a plate. Materials: Dirty pennies Glass Vinegar Salt Measuring spoons Paper towels Instructions: Fill the glass about halfway full with vinegar. If you are looking for an easy way to engage your kids with science, then why dont you try out the classic cleaning coins experiment? All rights reserved. Now check out your pennies. Water is the worst because it is a neutral liquid, meaning that it sits smack in the middle of the pH scale. And be sure to share these additional fun learning activities with your kids! To begin with, you'll want to find a handful of dirty pennies. It turns out that when you mix vinegar and salt, a chemical reaction takes place and form what is called hydrochloric acid. Please supervise your children during all activities. The ketchup is most likely what will surprise your kids the most (and lets be honest perhaps you too!). Book a Science PartyHave the Science Guy visit your school! Look how much cleaner it is. Vinegar and SaltMake a solution of vinegar and salt and let the pennies soak. When experimenting with how to clean pennies, we tested a variety of items, here are some ideas: Lemon or lime juice Water Soy sauce Dish soap White vinegar Ginger ale Ketchup Salt water Hot Sauce Mustard Milk Baking soda (we did not try this, but it would be a good option to add in!) ), and then explain why the salt and vinegar is the winner (sorry to give it awa, enrichment project during our money unit. However, over time, they turn dull and dark. Add the salt, and stir until the salt is completely dissolved. 2002-2023 LoveToKnow Media. There are two different stages to this Science activity. TPT empowers educators to teach at their best. This is because copper reacts to oxygen in the air and it turns into a compound called copper oxide. Have your kids write down their findings on their piece of paper ready to summarize their findings and talk through the explanation. You dont need any fancy gadgets or science kits. Take the pennies out one at a time and, keeping track of which penny is which, rinse each one off. You simply add salt to vinegar and you end up making an even more acidic concoction? Its that dull dark color that coats old coins. A hypothesis is a prediction of what is going to happen in an experiment based on knowledge that the experimenter already has. But sometimes those pennies you see on the ground look anything but lucky. Luckily, there are a number of ways to clean pennies and make them look bright and shiny again, using chemistry! We talked about the materials used for making, and the process of oxidation. Salt is also a key ingredient in the other cleaning agents, thus making them effective in cleaning the pennies. As you are drying them, you'll notice that rubbing results in some of the dirt coming off the pennies. we do during the week of Presidents' Day or when we are talking about coins in Math. What is the optimal time to leave the pennies in the cleaning solution? In this lesson, the students will predict why some. Make each cell (square) of the table large enough to place your penny in it after your testing is complete. Keep the pennies in the cup. Remember that copper turns dark brown when reacting with oxygen? A variety of products can be used to keep your pennies looking shiny and new. 1/2 cup vinegar. In fact, new pennies are so pretty that its considered a compliment to say that something is as shiny as a new penny. This means you will only have two cups to work with. They are going to love it! 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