Slime does not have its own shape. However, it can also be bounced like a ball because of its elasticity.
Pull the slime slowly and it flows more freely. If you pull it quickly, the slime will break off more easily because you are breaking apart the chemical bonds. Slime is all about polymers! A polymer is made up of very large chains of molecules. These chains slide past one another fairly easily which keeps the glue flowing. Chemical bonds are formed when you mix the PVA glue and slime activator together. Slime activators borax, saline solution, or liquid starch change the position of the molecules in the glue in a process called cross-linking!
A chemical reaction occurs between the glue and the borate ions, and slime is the new substance formed. Instead of flowing freely as before, the molecules in the slime have become tangled and create what is slime.
Think wet, freshly cooked spaghetti versus leftover cooked spaghetti! Cross-linking changes the viscosity or flow of the new substance. You can experiment with the viscosity or thickness of slime using our basic slime recipes. Can you change the viscosity of slime with the amount of slime activator you use?
We show you how to set up your own slime science experiments in the link below. Concerned that borax is not good for you? We have a number of taste safe borax free slime recipes for you to try. Find out what fun substitutes for borax you can make slime with! Please note, that a borax free slime will not have the same texture or stretch as traditional slime.
Feel like you are juggling between helping a few students and groups that finish at different times? Want to know what to say when children ask those difficult to explain WHY questions? For your information, Slime is created when PVA, in other words Polyvinyl acetate, comes in contact with sodium borate, sodium tetraborate, or disodium tetraborate.
Slime is a very easy craft that me and my class love so much, that we make it every Monday! We recommend the following slimes: Floam slime, Fluffy slime, Iceburg slime, Crystal clear slime, and Bubble Rap slime. We use the box of McCormick liquid food coloring bottles from the spices section of the grocery store! Does the borax react with the PVA to make it less dangerous?
Thanks, Lisa. This is your borax solution. If you would like your slime to be a certain color, add one or two drops of food coloring to your borax solution. Place 1 tablespoon of water in another cup and add 1 tablespoon of Elmer's glue.
Stir with a popsicle stick until the glue and water are thoroughly mixed. This is your glue solution. Slowly pour all of the borax solution into the glue solution, and stir with a clean popsicle stick. You should notice a sudden change in the solutions.
Your slime is done when you can pick up your popsicle stick and most of the slime comes out on the stick. When you have some nice thick slime, pull it off the popsicle stick and move it back and forth between your hands.
The more you play, the less sticky it gets. Explore Wikis Community Central. Register Don't have an account? History Talk 0. Do you like this video? Play Sound. A pudgy elemental life form. It's said that desserts made from slimes of different elements will have incredibly distinctive flavors.
Silly Putty, Gak and slime! These substances can be confusing, too. Most substances become harder when cooled and flow much better as they warm up. Think of how honey slowly oozes from the bottle on a cold day and rushes out on a hot day. Silly Putty, Gak and slime are different.
They can feel as hard as a solid when squeezed in your fist, but as soon as you release your grip, they ooze out through your fingers like a thick liquid. Why would slime be different? In this activity you will make your own slime, play with it and discover what makes it flow! Background Is it a solid or a liquid?
Solids consist of tightly packed particles called molecules or atoms that clasp onto each other so the solid holds its shape. Liquids have particles that can slide over and around one another, allowing the fluid to flow. Only adding or taking away heat can make some liquids, like water or oil, flow better or worse. These are called Newtonian liquids. Non-Newtonian liquids, such as ketchup and slime, are different. Manipulations like squeezing, stirring or agitating can also change how they flow.
Sometimes they can become so viscous—or have such a hard time flowing—that they could easily be mistaken for a solid. One such non-Newtonian liquid can be created with white school glue, which is a polymer. A polymer is made from long chains of repeating parts called monomers.
One polymer might consist of hundreds of thousands of monomers. Polymers are also called macromolecules, or large-sized molecules. Some are man-made, such as plastic and nylon. Others occur in nature, such as DNA, wheat gluten and starches. White school glue is liquid because its long polymers can slide over and along one another. It does not flow easily, though; it is quite viscous. The addition of some chemicals—such as a borax solution or sodium tetraborate decahydrate dissolved in water —can cause cross-links to form between the polymers.
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