Discuss the results. Ask the water group to run through. Discuss the results. Sand Clay Silt Utah Agriculture in the Classroom Utah Agriculture in the Classroom 3. Background Sand, silt and clay are inorganic materials.
Sand is made up of larger particles which can be seen with the naked eye.
It has a coarse feel and allows water to move through very quickly. Silt particles are too small to see with the naked eye. Silt is often found in places that have flooded and dried out again. Clay is made up of very tiny particles. The particles fit together so closely that it is difficult for water to flow through.