(You may need to push the one in the catsup to get it fully submerged). Finally, after about 30 minutes to 1 hour, look at the coins again. Most of these aren't substances that are typically used to clean, which is part of makes guessing how they will affect the pennies more fun. This will allow you to make a better judgment of how well each method cleaned, by looking at the pennies before and after their treatment. And see whats the sciencebehind this phenomena. Stir until the salt dissolves. Slowly add water, 1 tablespoon at time, until youve created a paste. Do you notice any changes in the contents of the cups is anything bubbling, or changing color? Add the salt, and stir until the salt is completely dissolved. ), 2 tablespoons freshly squeezed Lemon Juice, 2 tablespoons Tabasco Sauce (or other hot sauce), 11 plastic cups (small Tupperware containers or bowls will work as well). Create a solution of vinegar and salt using one teaspoon of salt and 1/4 of a cup of vinegar. You don't have to do the 2nd one, but it's also a good scientific experiment and you'll even find out why the Statue of Liberty is the color that it is. 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. How does time affect the cleanliness of the pennies? They are going to love it! Get rid of dirt, oil, rust, and debris with a regular garage floor cleaning and maintenance routine. Make sure you stay with your kids during this part and engage with them. After 10 minutes, take the coins out of the cups and lay them out on some kitchen paper but do not dry them! Theres a reason for that. You can watch them change for the first few seconds. Extra: Experiment with even longer periods of time with each of the cleaning methods. All rights reserved. Copper oxide is what causes pennies to become dull. Through the data and . Students will practice NGSS skills such as asking questions, planning and carrying out an investigation, and analyzing and interpreting data. The vinegar + salt mixture and the ketchup will have come out as the clear winners. Put 1 tablespoon Tabasco into each Tabasco cup. more information Accept. Wet a toothbrush and begin scrubbing the penny. Thank you for sharing! In this activity you experimented with 4 different cleaning methods to determine which was the most effective at cleaning pennies. Ketchup. Vinegar (or Lemon Juice) and Salt This method is the best way to clean your pennies, and it will produce a very bright orangey-copper color on your pennies. What do your results tell you about the special properties of copper pennies? Recently, we did thisCleaning Pennies Experimentand the results were surprising to my kids. Update Includes Google Slides version for distance learning, Rated 4.77 out of 5, based on 172 reviews, " is a product that provides a fun and educational activity for children and adults alike. I know I was. I LOVE teaching! Do you notice any changes in the appearance of the pennies? Begin your control experiment. I used this experiment for my science class and my teacher was super impressed. Will using lemon juice and salt have better results than vinegar? Line these cups up in a row. You need just a few things for this experiment: Create a solution of vinegar and salt using one teaspoon of salt and 1/4 of a cup of vinegar. 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. About half way filled is fine. The liquids didnt clean the coins in 10 minutes so I think it needed to be for longer! I believe learning should be enjoyable and engaging. In each case, make sure the penny is completely covered by the contents of the cup. This activity helps students to see and experience the properties of water- including Adhesion, Cohesion, and Surface Tension. Read this: Life Lessons from the Scientific Method.). 1. Use your paper towels to gently dry off each penny, then place it in the corresponding square of your table. In time, however, they get darker, brownish and dull. This is your control. First, prepare all your cups and line them up on a counter. The kids had a lot of fun and the sorting sheet helped keep the organized and on track. We know that its mostly tomatoes a quite acidic vegetable. What do they look like? Next, drop in a dirty penny and stir. The following titles name the 20, /activities.Shake It! Let the pennies sit in the soda overnight. It can be done relatively quickly and with multiple ages. Stir until the salt dissolves. This is easy for the water and other thin liquids, but for ketchup or mustard, you need to flip the penny around to be sure it is coated. Simple, any age students! Pour enough of each solution into its corresponding dish to cover the pennies (it doesn't take much). If you have dirty, dull, or green pennies lying around, try the cleaning pennies science experiment to turn them bright again! Have your kids write down their findings on their piece of paper ready to summarize their findings and talk through the explanation. Make each cell (square) of the table large enough to place your penny in it after your testing is complete. This is one reason that the pH papers can be a helpful tool. Here is the full list so you can tick them off with your kids as you collect them: When it comes to what liquids you and your kids can use in this experiment, part of the fun is asking them what they think would be good to use and trying it out. That is why old coins look, well, old and new coins are bright and shiny. Chemical reactions are responsible for the change in a pennys appearance over time. Leave the coins to air dry for at least 30 minutes. Add the pennies. They can also consider which might clean the pennies fastest. Here is a step by step walkthrough of the experiment so you dont get forget what to do or lose track of where you are: Once this is all done, you may be tempted to clean everything but not yet! There are two different stages to this Science activity. Most of these aren't substances that are typically used to clean, which is part of makes guessing how they will affect the pennies more fun. Tomatoes contain naturally occurring citric acid, another acid that is generally slightly weaker than vinegar or lemon juice. Test whether these cleaning solutions work on other types of coins. Gently swirl the cup so that the penny is completely covered with Ketchup. This will help them to get thinking about the subject and soon, they will start to come up with their own questions. We use cookies to ensure that we give you the best experience on our website. Teacher Notes: Student Write-Up Sample: 1 colour page Are you getting the free resources, updates, and special offers we send out every week in our teacher newsletter? The ketchup is most likely what will surprise your kids the most (and lets be honest perhaps you too!). What works best to do this is an acid combined with salt. The salt and acetic acid in vinegar do the trick. 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. You might be surprised at how well the ketchup cleaned the penny. Record this number on your data table under trial 1. Place the penny (tails side up) on a flat surface. Kids are given some background on chemical reactions and oxidation. Cleaning Pennies Home Experiment Conclusions Annex Analysis This graph interprets the results of the experiment. Its not just dependent on how old the pennies are. Remember that copper turns dark brown when reacting with oxygen? Privacy. Step by Step Procedure: There are two different stages to this Science activity. Be sure the penny is coated in whatever solution is in that cup. My goal is to ease the burdens of educators by offering memorable learning activities. Its acid! Why is that? I have an easy science experiment for you today. So we did a little experiment to see what would actually happen. are shinier than others, learn the meaning of a hypothesis by watching a video (link to website), make a hypothesis, graph their hypothesis, are dull and how they become shiny. Set one penny aside to act as your control. The experiment can be done with just as much fun and learning without using this tool. Remember to be sensible and dont let them near any dangerous liquids like petroleum or bleach kids may come up with a few silly answers for fun, but as the adult, you need to draw the line at what is fun and what could be potentially dangers. Step 4: Why did the catsup clean the coin as well as the vinegar + salt solution? Copper oxide is the dull dark color that covers old coins the older a copper coin is, the more copper oxide it has coating its surface. What is the optimal time to leave the pennies in the cleaning solution? To remove this tarnish, an acid needs to be used to weaken the bonds between the copper and oxygen atoms. The acids (usually vinegar - acetic acid) break the copper oxide free from the penny. To get your kids involved, ask them a few questions about pennies and cleaning them. Salt is also a key ingredient in the other cleaning agents, thus making them effective in cleaning the pennies. In the second cup, put water mixed with dish soap. The child should be prepared to discuss why they think some solutions were more effective than others. My goal is to encourage moms, find practical parenting solutions, and help moms with the unique challenges twins bring! Penny Lab webapi.bu.edu 2022-10-29 . Repeat steps 2-8 with the pennies in your 5 minutes column. It is a great sensory STEM activity for preschoolers and older children. it does not say the date and author on the website! Place your 'Control, 1 minutes' penny into the 'Control 1' cup. Pour a small amount of each solution you chose into a cup. In this fun and easy kitchen science experiment for kids, we're going to use a chemical reaction to clean pennies. Place a penny on each square of your table, heads side up. 12-Page Black & White Download I'm so happy you're here!! Teachers- the materials are readily available! So if you want to try this simple science experiment out at home, here is what you need to do: The first step you will have to do is to make your hypothesis. And because this mixture is way up high in the acidic scale, it cleaned the coin so much better and quicker than just vinegar. Can you think of other safe household acids you could test? What will happen when the liquid cleans the coin? You simply place a, in three types of solutions, I chose water, soap/water, and salt/vinegar but you can change the solutions if you like (the sheet is editable). Discover the quickest ways to keep your Air Force 1s looking like they're fresh out of the box. . Just don't drink the coke afterward. Its exactly the same reaction thats happening to the dearly beloved Statue of Liberty! 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. All you need are, , water, dish soap, salt, and vinegar. The chemical reaction that dissolves the copper oxide on your pennies is an ongoing process. Explore this article things needed 1 Preparation 2 Collect pennies of varying color Collect pennies of varying color. Salt and vinegar mixed together creates a chemical reaction to form hydrochloric acid, which is far more acidic than vinegar alone. But, can make them shiny and new again. Penny cleaning science projects are a popular choice at grade school science fairs - and for good reason. Get your copper coins out of the containers where theyve been hiding for many years and get them cleaned. Conclusion: The hypothesis was proven true, and the pennies, were best cleaned by the strongest acid, which in this experiment was lemon juice. But we think that that alone could not clean coins this quickly. In this case, you may have noticed that the Ketchup and Tabasco pennies were not quiet as well-cleaned as the pennies that were in the vinegar and lemon juice. A questionable aspect of this experiment is arisen with the change of the color of ammonia during the experiment. Leave the paper clip in the solution overnight. While the coins are submerged in the cups, lay out some paper towels or kitchen paper and label each towel so you know which coin is going where. So if you look at the coin in the vinegar solution, it made the old coin a little bit brighter and less brown. The answer is pretty simple before 1982, pennies were made almost entirely from copper, and modern pennies are made of copper-plated zinc. And don't worry, I give the science behind it all! At the end students write which solution, Lab Activity" is an engaging and interactive lab, designed for high school and college biology classes. For any other use, please contact Science Buddies. After quite some time, or after exposure to an acid, pennies will formcopper sulfate, carbonate, and chloride salts, which gives pennies a green color. Materials: -pennies, fabuloso, ketchup, coke, lemon juice, paper . This is also why the salt and vinegar mixture was a better coin cleaner than just vinegar alone. Next, pour one liquid into each cup. Instructions. Mix until the salt is dissolved (it helps if the vinegar is a little warm). 12-Page Colour Download: I love coming up with simple and fun learning and STEM activities for kids. 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? What happened to the coins when air dried? Drop the pennies into the soda. salt water? 'Balloon Powered Rocket, ' link: Pre-made digital activities. Water is the worst because it is a neutral liquid, meaning that it sits smack in the middle of the pH scale. Well, after you wash the ketchup off, that is. You can dispose of any extra ketchup how you normally would. There is a second stage to this experiment that you can also try out while you are talking to your kids about their results from the first stage. Not only will this, Use this observation handout when experimenting. She is an accomplished screenwriter, teacher and blogger. Kindergarten Math Practice with the Zap Zap Math App, Falling Unexpectedly in Love With Homeschooling My Gifted Child, Disclosure Policy & Copyright Information. We're going to try this out today! Stage 1: First, prepare all your cups and line them up. First, put the coins back into the same mixture as the one you used in the first experiment. She's worked as a freelance copywriter and fiction writer for over a decade. Put 1 tablespoon Ketchup into each Ketchup cup. You explained the science behind it perfectly. Start by placing the Ketchup, 5 minutes penny into the cup labeled Ketchup 5. TOTAL PAGES AVAILABLE FOR, 10-IN-1 BUNDLE (Set 1 of 5) - Grades 4,5,6, What is in this '10-IN-1 BUNDLE'? When the oxygen and the copper on the coins' outsides interact, a substance called copper oxide is formed. Science - Lesson 2 of 50 - Grades 4,5,6 If you took a picture in Step 1, go back and compare each pennys cleanliness before and after being cleaned. The project above is a DEMONSTRATION. Well keep that in mind. Mix until the salt is dissolved (it helps if the vinegar is a little warm). Then write and draw your observations. 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And it even had added acetic acid! Your email address will not be published. 2 teaspoons salt. No, the scientific method isnt a chore. Have you ever wondered why some pennies are shiny and some are dull? This is because copper reacts to oxygen in the air and it turns into a compound called copper oxide. Compare the penny from the ketchup to the control penny. Dry the pennies with a paper towel. Compare the 1 minute and 5 minute pennies in each row. Answers to, Questions: 1 colour page As in ketchup, salt and vinegar . The salt in the ketchup adds dissolved chloride ions that bond with the copper to form copper chloride, which allows the acid to break up even more copper oxide. A hypothesis is a prediction of what is going to happen in an experiment based on knowledge that the experimenter already has. Vinegar and lemon juice are both acids. Put one penny in each of the liquids and make sure it's fully submerged. The young scientist tries to find out which of several solutions will clean pennies best, eliminating the copper oxide that gives the surface a dull and tarnished appearance. Since we have 6 different liquids here, its best to properly label each cup. Materials: Dirty pennies Glass Vinegar Salt Measuring spoons Paper towels Instructions: Fill the glass about halfway full with vinegar. Sometimes, all you need is some glue, some baking soda or a few old pennies. And hydrochloric acid is so much more acidic than vinegar alone. Making an hypothesis is easy its basically asking a question! Your kids will love this simple chemistry experiment. Cleaning Pennies Science Experiment for Kids. Find out! A coin collector prides himself on gathering pennies, but old tarnished pennies are an eyesore to anyone's collection. Extra: Test whether these cleaning solutions work on other types of coins. After that you won't see anything happen. Be sure to include one water cup as a control and one ketchup cup. 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. Once the budding scientist has a pile of pennies, he or she should choose and collect their selection of cleaning solutions. PRINT AND GO STEM BUNDLE. Place the pennies in the bowl, and allow them to sit for several minutes. You should have observed that each cleaning method made the pennies cleaner, but some methods may have been more successful than others. also after an hour of the salt and vinegar, the salt made the coin super duper weird and worse. Add the salt, and stir until the salt is completely dissolved. we do during the week of Presidents' Day or when we are talking about coins in Math. How do they feel? Two student printables are included for recording and responding to the lesson. While the coins are air drying in the second stage, you can talk your kids through their findings of the first stage together! Science - Lesson 1 of 50 - Grades 4,5,6 Therefore, each cleaning method you tested contained acid and salt, but the Ketchup and Tabasco sauce may have had a slightly weaker acid. How to Wash Rothy's Shoes & Flats & Keep Them Odor Free. Educational Toys And Child Development Research Studies. Start a 1 minute timer. If you are in a hurry these two cups can be enough, but more solutions are better to give a full picture of what is happening. Not only will you be improving them as an individual, you will also be strengthening the bond you share together. As in ketchup, salt and vinegar are both in hot sauce. Smell), Science Fair Project For Kids: Demonstrating How Plants Help Stop Soil Erosion, 10 Great Inventors Books To Inspire Young Children, DIY Bath Bomb for Kids Fun Science Experiments For Kids, Best Books To Get Your Kids to Fall in Love With Math Teach Approved, 5 old copper pennies (these coins need to be copper for this experiment to work), 5 strips of paper (for labelling each penny), A pen and paper for jotting down the results, 5 different liquids to use to clean your pennies. (we used our hands very messy business especially with the catsup but the kids thought that was fun!) Wash your hands. Teacher Notes: Regarding, : 1 colour page Lawrence holds a Bachelor of Fine Arts in screenwriting from New York University and a Master of Science in childhood education from Brooklyn College. Cleaning pennies with ketchup: easy and fun STEM for kids. Well, its time to look at what is in our catsup! Deidre is an avid writer with a Bachelor of Arts in Literature. Pennies rust overtime. As you are drying them, you'll notice that rubbing results in some of the dirt coming off the pennies. Look how much cleaner it is. Thats great to know Aayeshi. For my class, I just had to explain the process, give them a definition of a hypothesis (letting them know it's okay to be wrong!
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