Search for ""

Displaying 341-360 of 825 results
Article

Science Council of Canada

Science Council of Canada, organization created by federal statute in 1966 to advise the government on science and technology policy. The original membership was 25 appointed scientists and senior federal civil servants, later altered to 30 appointed eminent experts from the natural and social sciences, business and finance, and no civil servants.

Article

St Elmo's Fire

St Elmo's Fire is a blue or reddish glow, sometimes with the appearance of a flame, accompanying a powerful electrical discharge from a pointed conducting object in an intense electric field.

Article

Sonar

Sonar (sound navigation and ranging), method for locating objects by the reflection of sound waves. It is used naturally by such animals as BATS and DOLPHINS to locate food and obstacles.

Article

Sand and Gravel

Sand and gravel are unconsolidated, granular mineral materials produced by the natural disintegration of rock caused by weathering. The terms sand, gravel, clay and silt relate to grain size rather than composition. Sand is material passing through a number 4 (4.

Article

Smoking

Smoking is a universal health hazard. All forms of TOBACCO smoking are risky. Canadian consumption of cigarettes has been declining since the monitoring of smoking began in 1965, when an estimated 50% of adults smoked. In 1981 smoking prevalence had dropped below 40%.

Article

Silver Dart

J.A.D. MCCURDY was the principal designer and pilot; Glenn H. Curtiss developed the water-cooled engine, an advance on the association's earlier experiments.

Article

Submersible

The Canadian government took delivery of a HYSUB 5000 ROV in 1987. Designed and manufactured by International Submarine Engineering (ISE) of Port Moody, BC, the HYSUB is an electrohydraulic submersible remotely operated vehicle, operating with 6 to 250 hp.

Article

Tungsten

Tungsten (W), also called Wolfram, lapis ponderosus or Heavy Stone, is a silver-grey metallic element with the highest melting point of any metal (3410° C). Tungsten has a high density, high strength at elevated temperatures and extreme hardness.

Article

Time

Precise timekeeping helped establish and develop Canada. For the past 2 centuries, Canadian exploration, mapping, navigation and transportation have exploited state-of-the-art precise time systems.

Article

Tunnels

Unlike other mountainous countries such as Switzerland, and despite its size, Canada is not distinguished by well-known tunnels.

Article

Immunology

Immunology is a branch of MEDICINE that studies the body's ability to defend itself from foreign substances, cells and tissues, especially DISEASE-causing organisms, and seeks means of controlling that ability.

Article

Silviculture

Silviculture is the branch of FORESTRY that deals with establishing, caring for and reproducing stands of trees for a variety of forest uses including wildlife habitat, timber production and outdoor recreation.

Article

Taber Child

In 1961, fragments of a human infant skull from were recovered from the banks of the Oldman River near Taber, Alberta.

Article

Soaring

Soaring, or gliding, is the sport of flying a sailplane or glider for a sustained period of time by utilizing currents of rising air to stay aloft.

Article

Sports Medicine

Sports medicine practitioners help serious athletes plan preseason training and testing, provide early treatment for injuries, identify groups that may be susceptible to risk, and record frequencies in patterns of injuries.