GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Solubility. Left beaker: table salt (sodium chloride, NaCl) is soluble in water and forms a clear solution. Right beaker: sand (mostly silica, SiO2) is insoluble in water and settles at the bottom of a container, with clear water over it.
Model release not required. Property release not required.