LEARN NC was a program of the University of North Carolina at Chapel Hill School of Education from 1997 – 2013. It provided lesson plans, professional development, and innovative web resources to support teachers, build community, and improve K-12 education in North Carolina. Learn NC is no longer supported by the School of Education – this is a historical archive of their website.

Solid fragments of inorganic (not composed of living organisms) or organic (composed of living organisms) material that come from the weathering of rock and are carried and deposited by wind, water, or ice; sediments may also be formed from chemical, biochemical, or biological materials (such as minerals formed by the evaporation of sea water, sea shells, or plant remains). Sediments are usually dominated by minerals but they may also contain biological remains (fossils). Sediments may later become compacted, cemented and variously altered to form sedimentary rocks, for example sand becoming sandstone.