Science & Technology | The Canadian Encyclopedia

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  • Article

    Weather

    WEATHER FORECASTING is the attempt to understand atmospheric patterns to predict the weather conditions that will occur at a specific place and time, including temperature, wind, cloud, precipitation and humidity.

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  • Article

    Weather Forecasting

    Most modern meteorologists attempt to cope with physical processes by expressing them mathematically, ie, by creating mathematical models of the atmosphere. Powerful computers are then used to solve problems.

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  • Article

    Weather Modification

    Weather modification has been used in an attempt to increase rainfall and snowfall, to suppress hail, to clear fogs, to modify tropical cyclones and to suppress lightning. The term "weather modification" is not normally used to describe inadvertent changes in our WEATHER.

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  • Article

    Weather Observations

       Weather in Canada ranges from the extreme cold of the Arctic to tornadoes and other severe weather in the southern regions; from the storms and fog of the Atlantic to the dry heat and majestic thunderstorms of the prairies.

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  • Article

    Weights and Measures

    Weights and measures are terms which traditionally referred to standards of mass (or weight), length and volume. Over the past few thousand years such standards have frequently been introduced throughout the world for trading and tax purposes.

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  • Article

    Weights and Measures: Table

    Weights and Measures: Table Weights and Measures: Table Some Non-SI Units Used in North America Unit Definition SI Value LENGTH nautical mile air & sea measure¹ 1.852 km furlong 220 yd 201.2 m mile 1760 yd 1.609 km arpent 180 Paris feet 58.47 m yard 3 feet 0.9144 m foot 12 inches 0.3048 m inch 1/36 yard 25.4 mm  AREA acre (survey) 4840 sq yards (survey) 4047 m2 acre (commercial) 4000 sq yards (commercial) 3344.51...

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  • Article

    West Nile Virus

    West Nile VIRUS, a member of the flavivirus family, is related to the viruses that cause dengue and yellow fevers. The effects of infection with West Nile virus range from no symptoms to severe illness and even death.

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  • Macleans

    West Nile Virus Precautions

    THEY'LL SOON be here, riding the warm currents of summer: MOSQUITOES armed with the latest bioweapon - the West Nile VIRUS. Short of building a concrete bunker or setting up an unhealthy fog of repellent spray, there are ways of safeguarding the pasty flesh of Canuckus winterus.This article was originally published in Maclean's Magazine on May 19, 2003

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  • Editorial

    Alexander Graham Bell and the Invention of the Telephone

    The following article is an editorial written by The Canadian Encyclopedia staff. Editorials are not usually updated.

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  • Article

    White Pass & Yukon Route

    The White Pass & Yukon Route railway was built to meet the demand for transportation to the gold fields of the Yukon River basin during the Klondike Gold Rush. Completed in 1900, it was a feat of engineering and one of the steepest railways in North America. It ran 177 km from Skagway, Alaska, to Whitehorse, Yukon. Today, tourist rail excursions run on a portion of the original line.

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  • Macleans

    Why doctors want the right to pull the plug

    The battle between doctors and patients’ families has only just begunThis article was originally published in Maclean's Magazine on October 18, 2013

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  • Article

    Wildlife Conservation and Management

     The first European explorers and settlers in North America found wildlife in abundance. This wealth was recognized as having immediate commercial value, with FISHERIES and the FUR TRADE being the first widespread exploitive activities.

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  • Article

    Wildlife Preserve

    A wildlife preserve is an area of land or water set aside from at least some forms of development or recreational use, particularly from industrial use, hunting and motorized recreation, to protect wildlife and their habitats.

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  • Article

    Wind Chill

    The more pronounced the air movement (wind or moving air produced by walking, skiing or riding in a convertible) and the greater the temperature difference between the surface of the object and the air, the greater the heat loss.

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  • Article

    Wind Energy in Canada

    Wind energy is energy obtained from moving air. The motion results from the heating and cooling of the Earth; thus, wind energy is an indirect form of solar energy. It is normally turned into useful energy by the action of wind currents on moving surfaces such as the sails of a ship or the blades of a windmill. Wind energy is one of the oldest forms of energy used to supplement human muscle.

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