human
What are some of the most common types of sand?
assistant
1.  Sand is composed of particles that range in size from 0.5 mm to 2 mm, with an average grain size between 1 and 3 mm.
2.  Silt is a type of sedimentary rock composed of particles smaller than 0.25 mm.
3.  Clay is a type of sedimentary rock composed of particles smaller than 0.005 mm.