Silt:

- Size: Silt particles are smaller than sand particles, typically ranging from 0.002 to 0.063 millimeters in diameter.

- Density: Silt particles have a lower density compared to sand particles.

- Flow Behavior: Due to their small size and lower density, silt particles are more easily suspended in water and can be carried over longer distances by currents. They tend to form cohesive masses and stay suspended in the water column, resulting in a more uniform distribution.

Sand:

- Size: Sand particles are larger than silt particles, ranging from 0.063 to 2 millimeters in diameter.

- Density: Sand particles have a higher density than silt particles.

- Flow Behavior: Sand particles are heavier and less easily suspended in water compared to silt. They tend to settle down more quickly and form distinct layers or deposits on the riverbed or coastal areas. Sand transport occurs primarily through rolling, sliding, or saltation, where particles are lifted and transported short distances before settling again.

In summary, silt, due to its smaller size and lower density, can stay suspended in water longer and travel greater distances, resulting in a more uniform distribution. Sand, with its larger size and higher density, settles more quickly and forms distinct layers or deposits during transportation.