* Homogeneous mixtures have a uniform composition throughout. This means that if you take a sample from one part of the mixture, it will have the same properties as a sample taken from another part.

* Beach sand is made up of different materials, such as:

* Quartz (silicon dioxide) - usually the most common component

* Feldspar (various minerals)

* Shell fragments

* Rock fragments

* Organic matter

Because beach sand is composed of these different materials, it is heterogeneous. You can easily see the different components and they will not be evenly distributed throughout the sand.