An emulsion is like a smooth blend of two liquids that usually don’t mix together, such as oil and water. Imagine trying to mix salad dressing; oil floats on top of vinegar until you shake it up, creating a mixture that looks uniform. This is similar to how an emulsion works. In everyday life, emulsions are all around us. For example, milk is an emulsion where fat droplets are spread out in water. Mayonnaise is another example, made by mixing oil and egg yolk (which contains water) into a thick, creamy spread. Emulsions are important in many industries. In cosmetics, they help create lotions and creams that are smooth and spreadable on the skin. Paints are often emulsions, allowing them to be evenly applied and dry into a solid layer. Food products like ice cream use emulsions to be creamy and delicious. Creating an emulsion requires energy, like shaking or blending, to finely disperse one liquid into another. Emulsifiers, special ingredients, can help stabilize emulsions, keeping them mixed and preventing separation.