Insoluble materials are substances that do not dissolve in liquids like water. When added to water, these materials do not mix or form a solution; instead, they remain separate and can often be seen as solid particles. For example, sand, ...

An example of a soluble material is salt. When you add salt to water, it dissolves completely, forming a clear solution. The particles of salt mix evenly with the water, and you can no longer see the individual grains of ...