shield nucleus
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Shield (geology) — Geologic provinces of the world (USGS) Shiel … Wikipedia
Canadian Shield — The Canadian Shield mdash; also called the Laurentian Plateau, or Bouclier Canadien (French) mdash; is a large geological shield covered by a thin layer of soil that forms the nucleus of the North American or Laurentia craton. It has a deep,… … Wikipedia
Boreal Shield — The Boreal Shield is the largest ecozone in Canada. FormationCanadian Shield rock forms the nucleus of the North American continent. Other geological structures assumed positions around or on top of the Shield millions of years after it was… … Wikipedia
Arabian-Nubian Shield — The Arabian Nubian Shield (ANS) is an exposure of Precambrian crystalline rocks on the flanks of the Red Sea. The crystalline rocks are mostly Neoproterozoic in age. Geographically and from north to south the ANS includes the nations of Israel,… … Wikipedia
Stardust (spacecraft) — Infobox Spacecraft Name = Stardust Caption = Artist s conception of the Stardust spacecraft Organization = NASA Jet Propulsion Laboratory Major Contractors = Lockheed Martin Mission Type = Fly by, sample collection Satellite Of = Sun Orbital… … Wikipedia
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
HISTORICAL SURVEY: THE STATE AND ITS ANTECEDENTS (1880–2006) — Introduction It took the new Jewish nation about 70 years to emerge as the State of Israel. The immediate stimulus that initiated the modern return to Zion was the disappointment, in the last quarter of the 19th century, of the expectation that… … Encyclopedia of Judaism
Giotto mission — Infobox Spacecraft Name = Giotto Caption = Artist s concept of Giotto Organization = European Space Agency Major Contractors = Mission Type = Fly by Flyby Of = Comet Halley, Comet Grigg Skjellerup, Earth Flyby Date = (Halley) March 14, 1986,… … Wikipedia
chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another … Universalium
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… … Universalium
