Sand is a type of soil that is made up of small, loose particles of rock, such as quartz. It is usually light-colored and has a gritty texture. Sand is well-drained and does not hold water well, which is why it is often found in deserts.

Dirt is a more general term that refers to soil that is made up of a mixture of different materials, such as sand, silt, clay, and organic matter. It can be any color, and its texture can vary depending on the proportions of different materials it contains. Dirt usually contains more nutrients and holds water better than sand.