(Encyclopedia) shale, sedimentary rock formed by the consolidation of mud or clay, having the property of splitting into thin layers parallel to its bedding planes. Shale tends to be fissile, i.e.,…
(Encyclopedia) silica or silicon dioxide, chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white.…
(Encyclopedia) Basket Makers, name given to the members of an early Native North American culture in the Southwest, predecessors of the Pueblo. Because of the cultural continuity from the Basket…
DEPOSITIONFIND OUT MOREThe rocky material that is transported and DEPOSITED by rivers, seas, glaciers, and the wind is called sediment. Clay, sand, and gravel are all types of sediment.…
(Encyclopedia) paper, thin, flat sheet or tissue made usually from plant fiber but also from rags and other fibrous materials. It is used principally for printing and writing on but has many other…
(Encyclopedia) Jackson, Andrew, 1767–1845, 7th President of the United States (1829–37), b. Waxhaw settlement on the border of South Carolina and North Carolina (both states claim him).
The…
First Olympic Appearance: 1896 by Mike Morrison and Mark Zurlo Related Links Olympics Overview 20082008 Summer Games: ShootingEncyclopedia: Shooting Did You Know? The…
WHAT IS CEL ANIMATION? HOW DOES STOP-FRAME ANIMATION WORK? COMPUTER ANIMATIONFIND OUT MOREAnimation is an illusion made with a sequence of still pictures that are each slightly different. The…
Empowering the National GovernmentThe Supreme CourtMarshall CourtMarshall Steps InTaking ControlEmpowering the National Government Now that Marshall had clearly established the Court's power…
