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Its most important mineral forms are magnetite (Fe3O4, 72.4% Fe), hematite (Fe2O3, 69.9% Fe) and siderite (FeCO3, 48.29% Fe). In Brazil, some ore that contains practically no other minerals can grade as high as 68% Fe, but the crude ore mined in Canada grades between 30 and 44% Fe.

Canadair Challenger, corporate executive aircraft developed and built in Canada. Exhaustive testing resulted in an advanced wing design, broad body and quiet, efficient engines. It carries up to 19 passengers at a normal cruise speed of 819 km/h.

The Canadian Council of Professional Engineers (CCPE)/Conseil canadien des ingénieurs (CCI), established in 1936, is the national organization of the provincial and territorial associations that governs the practice of engineering in Canada.

Cadmium (Cd) is a soft, ductile, silvery white metal that melts at 320.9°C and is present in the earth's crust at 0.1-0.5 parts per million. The most common cadmium MINERAL, greenockite (CdS), is generally found in zinc-bearing ores and is recovered as a by-product during processing.

The International Development Research Centre (IDRC) was established as a public corporation by Parliament in 1970 to support research designed to adapt science and technology to the specific needs of developing countries. The first chairman was Lester B. PEARSON.

Opting-Out originated as a device by which one or more provinces choose not to participate in a federal-provincial shared cost program; instead the province receives direct payment (in cash or tax room) of funds which would have been spent there.

The Alberta Research Council, the oldest provincial research organization, was established by order-in-council as the Scientific and Industrial Research Council of Alberta in 1921. Instrumental in founding the organization were J.L. COTÉ, provincial secretary, and H.M.

Consumers normally consider that the term "food additive" refers to almost all substances, primarily chemical in nature, added to foods during production, manufacture, packaging or storage.

As a thunderstorm grows, or a mature storm approaches, this electric field is reversed. In general, the lower part of a cloud is negatively charged; the upper portions, positively charged. A further positive charge is induced on the Earth's surface below a thunderstorm.

From earliest times it has been recognized that artificial light prolongs daytime activities. Relaxation and social interaction necessarily occurred after the day's work was done; therefore, indoor lighting has always had a special association with this aspect of living.

Linguistics is the study of language. Language accompanies almost all human activities, and is the medium for many of them.

Lead is extracted from mined ores containing zinc, silver and minor amounts of copper. It is also recovered from recycled materials; more than 50% of world metal production comes from recycling, making lead one of the most recycled metals in the world.

Ecology is subdivided into 3 fields of study: autecology (relations of individual species or populations to their milieu), synecology (composition of living communities) and dynecology (processes of change in related communities).

 McKee Trophy, award given annually for contribution to the advancement of Canadian aviation. It was donated by J. Dalzell McKee, an American sportsman pilot, who completed the first flight of a seaplane across Canada in 1926.

Medical jurisprudence, broadly defined, covers the relationship between a patient and a health-care provider such as a doctor, nurse, dentist, physiotherapist, or even an institution such as a HOSPITAL.

The Metropolitan-Hinterland Thesis is a theory of historic relations between a large, powerful urban community (metropolis) and the surrounding territory (hinterland) which the metropolis dominates through mainly economic means. Formulated by economic historian N.S.B.

Early settlers in Ontario experienced a disease called "fever and ague," which ravaged the first European settlements such as Newark [Niagara-on-the-Lake] and Cataraqui [Kingston].

The term medicine wheel is not an Aboriginal term, but was initially used around the turn of the century by Americans of European ancestry in reference to the Bighorn Medicine Wheel located near Sheridan, Wyoming. Later archaeological research on the Plains Aboriginal people identified other features characterized by a variety of stone circle, cairn and spoke configurations. Because of general similarities to the Bighorn Wheel, the term medicine wheel was extended to describe them as well.

The involvement of a society in mathematics is determined by cultural and functional factors.