Nature & Geography | The Canadian Encyclopedia

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  • Article

    Waterfall

    A waterfall is a phenomenon which occurs when water flowing in a river channel encounters a vertical or near-vertical drop in the channel bed. 

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  • Article

    Waterfowl

    Waterfowl is a general term used for members of the family Anatidae, composed of closely allied species commonly known as ducks, geese and swans.

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  • Article

    Waxwing

    Waxwing is a family of birds comprising 8 species, including the true waxwings, the palmchat of Hispaniola and the silky-flycatchers of the southwestern US and Central America.

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  • Article

    Weasel

    The weasel is a small, long-bodied, carnivorous mammal of the family Mustelidae. Three species of weasels are found in Canada: the short-tailed weasel, also known as the ermine or stoat (Mustela erminea), the long-tailed weasel (Mustela frenata), and the least weasel (Mustela nivalis). The least weasel is the smallest species in the order carnivora. The genus Mustela also includes mink, black-footed ferret, and the introduced European ferret.

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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

    Weathering

    Fragmented rock materials formed by mechanical weathering are normally larger than clay particles. These materials constitute major sources of sediment for later erosion, transportation and deposition under the impetus of gravity, wind, water or ice.

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  • Article

    Weeds

    Weeds are plants growing where humans do not want them.

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  • Article

    Wetlands

    Wetlands cover about 14 per cent of the land area of Canada, and are the natural habitat of over 600 species of plants, animals and insects. In addition to providing a home for these plants and animals, wetlands are an essential part of the environment because they prevent flooding, filter toxins, store groundwater and limit erosion. The most common wetland habitats are swamps, marshes, and bogs.

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  • List

    Whale Species in Canada

    Whale is the common name for large marine mammals of the order Cetartiodactyla (formerly Cetacea). They are subdivided into the Mysticeti, or baleen whales, and Odontoceti, or toothed whales. Smaller kinds of toothed whales are called dolphins or porpoises. Thirty-five whale species are found at least occasionally in Canadian waters — 9 species of baleen whales, and 26 species of toothed whales (mostly dolphins and porpoises). The commercial pursuit of whales was significant in early European exploration of Canada (see Whaling). Since the end of commercial whaling in Canada in 1972, whale watching has become popular. Whales found in Canada range in size from about 60 kg for the harbour porpoise to well over 100 tonnes for the blue whale, making it the largest animal ever known.

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  • Article

    Wheat

    Wheat is the common name for members of genus Triticum of the grass family (Gramineae) and for the cereal grains produced by these grasses. 

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  • Article

    Whelk

    Whelkis the common name for a carnivorous marine snail which may be included with the Buccinid, Muricid or Purpurid families.

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  • Article

    White Fox

    White Fox, Sask, incorporated as a village in 1941, population 364 (2011c), 348 (2006c). The Village of White Fox is located about 130 km east of Prince Albert, just north of Nipawin and the Saskatchewan River. The village is named for the White Fox River which flows through the district.

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