Definition
Foam is a substance formed by trapping gas bubbles in a liquid or solid. Think of the bubbles in your soda or the frothy top of a latte β. It's characterized by its light, airy texture and relatively low density. Foam can be desirable, like in shaving cream, or undesirable, like in polluted water. It's a fascinating example of how gas and liquid can combine to create something unique. Imagine it as a bubbly sculpture crafted from air and liquid. π«§