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Milk and Vinegar Plastic Science Experiment (with free printable worksheet)

With 2 simple ingredients you have in your kitchen you can quickly and easily make your own plastic milk! Kids are going to be super impressed with this fun, hands-on Milk Plastic project! With this very simple science experimentfor kids, you can turn milk into plastic! This milk and vinegar experiment is perfect for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th graders too .Simply download pdf file with milk and vinegar experiment worksheet and you are ready to start this fun science experiment with milk!

With 2 simple ingredients you have in your kitchen you can quickly and easily make your own plastic milk! Kids are going to be super impressed with this fun, hands-on Milk Plastic project! With this very simple science experimentfor kids, you can turn milk into plastic! This milk and vinegar experiment is perfect for preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th graders too .Simply download pdf file with milk and vinegar experiment worksheet and you are ready to start this fun science experiment with milk!


Plastic milk

Did you that before plastic was made from petroleum it was made from milk! In the early 1900s milk was used to make beads for jewlery and buttons.  I love doing science experiments that impress kids! Not only are they eager to learn, but it stretches their little minds. Today’s easy science experiment is going to really impress your kids! They are going to change milk into plastic. The best part is this plastic milk is super simple to make and has such a great WOW effect for children of all ages. Try this turning milk into plastic with preschoolers, kindergartners, grade 1, grade 2, grade 3, grade 4, grdae 5, and grade 6 students. Whether you are a parent, teacher, or homeschooler – this vinegar and milk is a must try at home and in the classroom.

Milk and Vinegar experiment worksheet

Start by scrolling to the bottom of the post, under the terms of use, and click on the text link that says >> Download <<. The plastic milk experiment worksheet pdf file will open in a new window for you to save the freebie and print the template.

heat milk to just before boiling+plastic +made +of +milk

To start out with you are going to heat up 1 cup of milk to almost boiling in a saucepan or microwave it for 90 seconds.

Hint: I suggest using non-homogenized milk if possible for better clumping

Take the pan off the heat and add 4 Tablespoons white vinegar and stir for 1 minute. You will see the milk separate and clumps form.

drain out liquid in a strainer

Milk into plastic

Now pour into a strainer to get rid of the extra liquid.

you'll be left with lumps

Turn milk into plastic

This is what you are left with. Once they are cool enought to touch you can rinse the milk chunks and then press them together. Now wrap them in a paper towel and sqeeze out any extra water.

add some food coloring drops to color your plastic

Milk and vinegar experiment

You have two choices of WHEN to color your milk plastic. Put a drop or two of food coloring in several small bowls and pour the milk in them just after you’ve added the vinegar; stir. Or you can add it once you have rinsed the chunks and squeezed out the extra liquid; you can also add in glitter.

pat dry with paper towel

Vinegar and milk

Spoon out your clumps from the strainer and pat dry with a paper towel. The more liquid you pat out the stronger plastic you will make.

plastic-milk-science-project

The mixture can be formed into a ball and pressed flat. I suggest using a cookie small cookie cutter shape your mixture. Press down until it is smooth. Use toothpicks to make holes to make beads for necklaces.

Place on paper towels to dry for at least 2 day.

making plastic out of milk

Plastic Milk

Another ideas is to turn this into more of an experiment by testing different fat percentages of milk such as fat-free and low-fat varieties. You could even test different ratios of vinegar to milk. How about trying a different  acid such as lemon juice; would that turn the milk into plastic?

 

Vinegar and milk chemical reaction

Wondering about the science?

No, this milk and vinegar experiment does not produce real plastic. You made a substance called CASEIN which occurs when the protein in the milk meets the acid in the vinegar. As the casein in milk does not mix with the acid, the molecules move to join forces to make the casein plastic which forms a plastic-like blob that you can strain and mold.

When the plastic is dry, it is hard, shiny, and durable.

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milk and vinegar experiment worksheet

Plastic milk experiment worksheet

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>> Download Plastic Milk Worksheet <<

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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