Slime Recipe: Cornstarch & Dish Soap

Did you know you can create a captivating, wiggly slime with just two household ingredients, cornstarch and dish soap? This fun, engaging recipe is perfect for kids, and adults too! It's not only mesmerizing to play with, but it also offers an intriguing learning opportunity about non-Newtonian fluids. Let's dive into the world of slime and explore this simple, yet striking recipe.

Before we get started, it's essential to understand that this slime is much messier than traditional, store-bought slime. It's more of a slimy, goopy texture that's best enjoyed with old clothes or on a covered surface. Now that we've set clear expectations, let's get slimming!

Gathering Your Ingredients

For this slime recipe, you'll need just two main ingredients: cornstarch and dish soap. Here's a simple list to ensure you have everything you need:

• 1 cup of cornstarch
• 1/2 cup of dish soap

Why Cornstarch and Dish Soap?

Cornstarch and dish soap may not seem like a likely pair, but they create a unique chemical reaction that results in a fascinating, slime-like substance. Cornstarch is a type of complex carbohydrate called a polysaccharide, while dish soap is a surfactant that reduces the surface tension of liquids. When combined, they form a non-Newtonian fluid, a term you'll learn more about in the next section.

It's important to note that not all dish soaps will work equally well for this recipe. Look for a dish soap with a high concentration of laureth sulfate or lauryl sulfate, as these are the active ingredients that create the best slime effect.

Understanding Non-Newtonian Fluids

Now that you know the secret behind your slimy success, let's take a moment to understand non-Newtonian fluids. Non-Newtonian fluids are substances that don't follow the standard rules of fluids, meaning their viscosity (thickness) changes under stress or pressure. In other words, they behave differently when you apply force compared to when you don't.

Our slime is a example of a dilatant non-Newtonian fluid, meaning it thickens as more stress is applied. This is why you can hold the slime in your hand with ease, but when you try to squeeze it, it suddenly becomes more solid-like. Isn't science fascinating?

Exploring Your Slime's Properties

Now that you've created your slime and understand the science behind it, it's time to investigate its unique properties! Here are some fun experiments to try with your new creation:

• Squeezing test: Try squeezing the slime in your hand. Notice how it becomes more solid when you apply pressure? This is an excellent demonstration of the dilatant property we discussed earlier.
• Shear thickening: Pour the slime onto a flat surface and try to poke or prod it with your finger. Observe how it hardens when you apply stress, but remains slimy when you don't.
• Non-Newtonian fluid comparison: If you have access to other non-Newtonian fluids, such as oobleck (cornstarch and water), try comparing their properties side-by-side. You'll quickly notice the differences in behavior between the two.

Creating slime with cornstarch and dish soap is an engaging and educational activity that fosters curiosity and encourages exploration. The next time you're looking for a fun, low-cost project to try at home, give this recipe a go and let the slimy adventures begin!