Ice Cream in a Bag: Exothermic Reactions | Science for Kids That way you make a smoother product. Even on a very hot day. The ice–salt combination gets colder than pure water ice and can freeze the ingredients in the ice cream machine (and in the bags you used in this activity), turning them into ice cream. Ice cream has been a summer favorite for over a hundred years, especially in the United States. Place the double bagged small baggie into the larger baggie and seal. How important do you think they get cooled to a certain temperature? If you live in a cold climate, you may have seen trucks spreading salt and sand on the streets in the wintertime to prevent roads from getting slick after snow or ice. This ice cream in a bag science experiment is a fun activity to try at home or in the classroom. The size of the ice crystals largely determines how fine, or grainy, the ice cream eventually turns out. Technically, the temperature that the salt lowers is called the freezing point. Now add four cups of ice cubes to the other large, gallon-sized bag, but this time do not add any salt to it. Grades: 4 th, 5 th, 6 th, 7 th, 8 th, 9 th. Freeze any uneaten ice cream. The addition of salt lowers the freezing point by a few degrees ( freezing point depression ). Ice Cream Topping or Add-In of your choice (we used Milo, because yum!) 4. To make ice cream, the ingredients—typically milk (or half and half), sugar and vanilla extract—need to be cooled down. And if you’re low on ice cream in your freezer, it’s a great way to make your own treat! It’s always a party here. Ice cream is an emulsion, which means small droplets of one liquid dispersed or spread throughout another liquid. Think salad dressing… Oil and vinegar don’t dissolve, but they can disperse into an emulsion with the help of a whisk. Deep Dish Bacon and Cheese Breakfast Pizza | Recipes for Kids, RLL #96: Finding Learning Opportunities with Dennis DeNoia, Learning Strategies for Reluctant Gifted Kiddos, A Million Things You Haven't Found | Gifts for Hamilton Fans, Disclosure Policy & Copyright Information, Chocolate syrup (if you want to make chocolate ice cream). Science sure is tasty! The easiest and least messy way to get the ice cream out was to cut off a corner of the sandwich bag and squeeze out the cream like soft serve. In 90-degree heat. Hi! If you have cream in your refrigerator, it’s time to transform that into delicious ice cream using the scientific principles of exothermic reactions! When salt is added to ice, it lowers the melting point of ice to below freezing. A good pair of gloves are needed as this science activity does get very cold. Ice Cream in a Bag! Subjects: Chemistry, General Science, End of Year. You can also compare how cold the different ice cube bags feel. The best part about this kids ice cream in a bag activity is that I bet you have many, if not all, of the ingredients in your kitchen right now. 1 gallon-sized zip-top bag. How do the ingredients change during this process? Fill the large bag about ½ full of ice. You should have seen that the ice cubes in the large bag with salt melted much more, and felt much colder, than the ice cubes in the large bag without salt. Why does shaking some dairy in a bag make ice cream? (This is the same process that occurs when icy roads have salt spread on them to melt the ice, keeping the roads less slippery at lower temperatures.) Why is this? 1/4 cup of Rock Salt. Kids will love this part. Use oven mitts if fingers get cold. Edible science has become one of our favorite things to do together these days. After the ice cream hardens, put the bags in the freezer for about 30 minutes. I thought that there would be many Science Lessons From Making Freezer Bag Ice Cream. Put on oven mitts or wrap the bag in a small towel and then shake the bag for five minutes. Shake, shake, shake the bag until the sorbet is the consistency you want. 1/4 cup sugar. 9. Solutions Homemade Ice Cream in a Bag. In this science activity you'll make your own ice cream (in a bag!) The ice–salt combination gets colder than pure water ice and can freeze the ingredients in the ice cream machine (and in the bags you used in this activity), turning them into ice cream. The Science Behind the Ice Cream in a Bag Experiment. A lot of interesting chemistry is actually needed to make ice cream. With a few simple ingredients you can be eating a cold treat in no time! Use a little bit of science to make a tasty ice cream treat without a freezer or ice-cream machine. In order for the ice to melt, however, it has to absorb heat from it’s surroundings like the ice cream in the bag. The ice in the ziplock bag has to absorb energy from its environment in order to … Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners. Because it was cold enough (several degrees below freezing), the ice cube bag with salt should have been able to cool the ingredients enough to harden them and turn them into ice cream whereas the ice cube bag without salt wasn't cold enough to do this, leaving the ingredients fluid. 3. (If you put the fluid ingredients back in the bag with ice cubes and salt and shook them for about five minutes, the ingredients should have been cooled sufficiently to turn into ice cream!) What You Need. Put the small quart bag into the gallon bag and surround with the ice. Kids will love this tasty demonstration of science and will ask to do this ice cream in a bag experiment over and over. Background With our hands. Ice cream in a Bag Science Lesson Plan Here’s the sciency bit. Be sure both bags are sealed. Keep the bags in the refrigerator until you are ready to continue on to the procedure. Let’s talk about the STEAM concepts behind homemade ice cream In our recipe, we added a squeeze of chocolate syrup to one bag and some sprinkles to the other. Our ice cream turned out great, and I know I’m going to have to keep lots of half-and-half on hand this summer because we are going to be making this a lot! In this case, heat is released from molecules moving around, but it has the surprising effect of freezing cream into ice cream! Ice Cream in a Bag Preschool Science Activity. Since today is the third Sunday of July, National Ice Cream Day, I have been left with no choice but to write about the science behind ice cream. Yum! 1/2 cup rock salt. Place the bag of juice inside the baggie containing the ice, salt, and water. 2 cups of Ice. All it takes is a few simple ingredients and some knowledge of Chemical Engineering! A chilly, edible chemistry challenge from Science Buddies, Key concepts How It Works . The best part is you don't need an ice cream maker or even a freezer. You can make ice cream in a plastic bag as a fun science project. Make Ice Cream in a Baggie, from About.com Chemistry 1/4 cup of Milk. Smart as well as delicious! You will also find out the science behind how this works. Since the mixture isn’t water it needs to be a little below 32 degrees to freeze. Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at, Boiling-Point Elevation and Freezing-Point Depression, Fun, Science Activities for You and Your Family, Chemistry of Ice Cream–Making: Lowering the Freezing Point of Water, Half and half (Alternatively, milk or heavy whipping cream may be used. Talk to kids about the science behind this experiment as you take turns shaking the bag. This allows molecules to release energy, but the movement freezes the cream in the bag. Chemistry Melting needs energy which in this case comes from the milk mixture in the inner bag. Why does ice cream in a bag work? Since the ice cream isn’t just water, it needs to be a little below 32°F to freeze. Adding salt to ice lowers its melting point. source: Food For My Family Ice Cream in a Bag. How to Make Ice Cream in a Bag. How about making instant ice cream at home? Pull the bag of ice cream out and serve! Tea towel or Oven Mitts. I’ll get to the recipe and experiment soon, but first – the science! By lowering the temperature at which ice freezes, you were able to create an environment in which the cream mixture could freeze at a temperature below 32℉ (0℃) and become ice cream. Here’s what happens next according to Steve Spangler Science: “Keep in mind, however, that heat must come from somewhere to melt the ice. ), Two small, sealable bags such as pint-size or sandwich-size Ziplocs. Making Ice Cream in a Bag is a really fun way to incorporate a mini Science lesson into the middle of summer because it teaches them how salt makes the temperature around the ice cream colder so the ice cream freezes faster, plus it tastes amazing so the kids love it. Curriculum links © 2020 Scientific American, a Division of Springer Nature America, Inc. Support our award-winning coverage of advances in science & technology. The difference is the salt. Feel the smaller bag every couple of minutes while you shake it and take a peek at it. Freezing Introduction No store is open and your parents are fast asleep. Seal up each bag after adding the ingredients. You will need: In each quart bag, add 1/2 a cup of cream, a tablespoon of sugar, and a little bit of vanilla. Kids can help shake the bags and of course finish off the ice cream. Food science Add 6 tablespoons of rock salt to the ice. 3 cups ice Again, feel the smaller bag every couple of minutes while you shake it, and take a peek at it. One way to do this is by using salt. Chemist Matt Hartings and ice cream maker Ben Van Leeuwen, co-founder of Van Leeuwen Artisan Ice Cream in New York City, talk about the science behind how milk, sugar, and eggs turn into your favorite frozen desserts. Add the ice, salt, and water to a much larger bag. The Science Behind Ice Cream. Boiling-Point Elevation and Freezing-Point Depression, from Iowa State University This is a fun and tasty food science project that explores freezing point depression. When salt and ice combine, the freezing point of the ice is lowered. It also adds air to the final … As the ice cubes start to melt a little bit the water molecules mix with the salt molecules. This can be done by placing the ice cream bag in a sunny window or leaving it out on a counter to melt. They’ll chat about the sweet science behind other frozen delights, too—like how the size of water crystals affect texture and how you can make a scoopable vegan ice cream. Most ice creams consist of a successful frozen emulsion of five basic components: – Ice crystals Created when the water-content in the base starts to freeze; they put the “ice” in “ice cream”, giving solidity and body. The salt lowers the temperature at which water freezes, so with salt ice will melt even when the temperature is below the normal freezing point of water. In the case of the two ice cream bags, one with salt and ice and one with just ice, you have the same outside temperature, so the molecules are moving around at the same rate. For example, think about how you start out with refrigerated (or even room-temperature) ingredients and then need to cool them down to turn them turn into ice cream. This will prevent saltwater from seeping into your ice cream. TIPS FOR MAKING ICE CREAM IN A BAG A word of caution, the bag will get very cold once you add the salt to the ice. Why does this science experiment even work? To Freeze: 1 quart-sized zip-top bag. Outside. Phases of matter The salt you add to the ice causes it to start melting, just as salt added to icy roads does in winter. This means when salt is added to the ice in the outer bag, the ice (which is at 0°C) is above its freezing point, so starts to melt. 3/4 cup cream. In each small bag, place one tablespoon of sugar, one half cup of half and half (or milk or heavy whipping cream) and one quarter teaspoon of vanilla extract. Pull out the bags, squeeze the ice cream into bowls, and enjoy! Remove the inner bag, scoop out your frozen treat and enjoy! If the ingredients in one of your bags did not become ice cream, check out the extras below for tips on turning them into ice cream. Changing matter experiment The Science Behind Ice Cream. Normally water freezes at 32 degrees F (0 degrees Celsius) but … by Brenda Priddy | Nov 15, 2017 | Homeschool |. Mittens will protect tender hands. It can be a lot of fun, and you end up with a tasty frozen treat! If you successfully made some ice cream, you can enjoy it now as a tasty reward for your chemistry challenge! Make sure the crushed ice surrounds the inner Zip-loc bag. Why it Works. Add four cups of ice cubes to one of the large, gallon-size bags. I’m Colleen, gifted specialist, educational consultant, author, speaker, and homeschool mom of four gifted/twice-exceptional kids. Grab a cup of coffee, some of that chocolate you’re 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! Of course, my goal is always to teach and encourage progress which means that I couldn’t simply make ice cream with him. This homeschool mom loves to be able to share how ice cream in a bag works. It does require some adult supervision and assistance. The heat that causes melting comes from the surroundings and, in this case, it’s from the … (A solution is made when a substance, such as salt, is dissolved and becomes a solute. Put this inside another small baggie and seal. Pure water freezes at 0 degrees Celsius. Put on oven mitts or wrap the bag in a small towel and then shake the bag for five minutes, as you did before. The medium into which it is dissolved is a solvent—typically a liquid, like water.) The ice absorbs heat from its surroundings (the bag of ice cream mixture) which allows the ice cream mixture to freeze. You can celebrate July, National Ice Cream Month, by making your own tasty creation. Then add one half cup of salt to the bag. Ice cream is basically droplets of fat from milk suspended in millions of tiny crystals of ice, fluffed up with tiny pockets of air. The salt added to the ice lowers the melting point of the ice… Materials, Observations and results 1/2 teaspoon Vanilla. What You Need: 1/4 cup of Cream. For our ice cream, it allows the temperature of the mixture around the ice cream to get colder. Chemistry of Ice Cream–Making: Lowering the Freezing Point of Water, from Science Buddies, This activity brought to you in partnership with Science Buddies, 6 hours ago — Garrett Kenyon | Opinion, December 4, 2020 — John Horgan | Opinion, December 4, 2020 — Robin Lloyd | Opinion, December 4, 2020 — Avery Ellfeldt and E&E News. You will need: Whole milk, heavy cream, or half and half; Sugar; Vanilla; Ice; Kosher salt or ice cream salt; Plastic freezer bag ; Plastic container; Spoons and bowls; Sprinkles (optional but fun!) Did the ingredients that were shaken in the large bag with the ice cubes and salt turn into ice cream whereas the ingredients that were shaken with ice cubes alone (and no salt) remain fluid, and not harden into ice cream? Made with real cream, the ice cream is amazingly delicious! It also reveals how salt and ice make a chilling combination. In this segment, Dr. Ainissa Ramirez describes the science behind a tasty bit of chemistry—ice cream. If you have ever made ice cream with an old-fashioned hand-crank machine, you probably packed a mixture of ice and rock salt around the container holding the cream. Combining the ingredients into the bag is also a mini math lesson, so it’s a super sweet activity all around! Put the other small bag you prepared into this large bag. An exothermic reaction is a chemical reaction that releases light or heat. Americans have the highest consumption of ice cream in the world, at over 23 quarts per capita per year! Shake the bag around for about five minutes. In How to Make Ice Cream in a Bag you can follow step-by-step directions at home for making your own ice cream. What do you do? and explore the best way to chill the ingredients to make them become a delicious reward! about making ice cream in a ziplock bag is that it is a science lesson too! Ice Cream in a Bag Ingredients. So when you shake the bag, it emulsifies the ice cream, dispersing the ice crystals, fat molecules and air. The shaking (or stirring in an ice cream maker) moves the warmer cream mixture from the inside to the outside of the bag so it can freeze evenly. Wrap the … Salt when added to the ice cubes lowers the melting point of the ice, just like it does when we add salt to roads in the winter. This activity shows you how to make the right mixture, then make it cold enough to create those ice crystals without the aid of a freezer. 2. Put one of the small bags you prepared into the large bag with the ice cubes. Seal. Subscribers get more award-winning coverage of advances in science & technology. We’ve churned our own butter, and today we’re making ice cream. Salt or sodium chloride dissociates into sodium and chloride ions. May as well learn a little something. When using a crank ice cream machine, you frequently have to add more salt and ice, so you can watch the process of melting ice more than once. Snack-Sized and Sandwich-Sized Zip-Lock Bags. And what is ice cream without sprinkles?! Fill the other bag about half way full of ice and put a liberal amount of salt into the bag. Now you have salt and water molecules moving around together, the mixture makes it harder for the water molecules to … ), Salt (Different types of salts, such as table salt or rock salt, should work but may give slightly different results. The main objective (apart from the freezing itself) is therefore to keep the size of the ice crystals down as much as possible… The cool thing (see what I did there?) It only takes a few minutes to transform cream into tasty frozen cream that is as delicious as it is scientific. This download includes the directions on how to make ice cream in a bag, a brief reading passage about the science behind making ice cream in a bag & a questions review with open ended questions & a states of matter chart.Answer Key IncludedEditable Copy IncludedPlease leave a comment and ra. More to explore Heat energy is absorbed from … I decided it was a good day for Science Lessons From Making Freezer Bag Ice Cream. Have you ever made homemade ice cream? Fun, Science Activities for You and Your Family, from Science Buddies Although pure water freezes at 0 degrees Celsius (32 degrees Fahrenheit), water mixed with salt will only freeze at colder temperatures below 0 degrees C. After completing this lesson, students will be able to: 1. identify independent, dependent, and controlled variables in an experiment 2. explain the effect of salt on ice 3. compare and contrast what happened to the ice cream in the bag with the salt and the bag without the salt Close the bag. If you haven’t already, you can enjoy your tasty ice cream treat now or save it in the freezer for later. You know, the science behind it. You can watch a demonstration of how this works in the video below. It is midnight, and you are craving for some luscious ice cream; but unfortunately and depressingly, your elder brother finished the last scoop of it. Put ½ cup of milk, ¼ teaspoon of vanilla, and 1 tablespoon of sugar into a smaller baggie and seal. The Science Behind Ice Cream in a Bag: The salt added to the ice lowers the melting point of the ice, just like it does when we add salt to roads in the winter. 1/4 teaspoon vanilla. I wanted to include some science. In order for the ice to melt, however, it has to absorb heat from its surroundings like the ice cream in the bag. Holding the bag in a hand towel, gently massage or shake the freezer bag to cool the ice cream mixture. … Cleanup Be sure both bags are sealed shut. As we'll see in this activity, freezing-point depression is not unique to solutions made of water and salt; it also happens with other solutions. 1/2 cup milk. This is such a fun activity for kids in the summer! When a freezing point is lowered, such as by adding salt to water, the process is called freezing-point depression. Discover world-changing science. Crushed ice surrounds the inner bag, scoop out your frozen treat reaction is a few simple ingredients some... Do n't need an ice cream, the temperature of the small quart bag into the gallon and! Of milk, ¼ teaspoon of vanilla, and today we ’ re making ice cream in the,. Because yum! half and half ), Two small, sealable such... 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