Browse "Nature & Geography"

Displaying 861-880 of 900 results
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.

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.

Article

Weeds

Weeds are plants growing where humans do not want them.

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.

Article

Whale

 Whale, common name for large, aquatic or marine mammals of order Cetacea, which inhabit all oceans.

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.

Article

Whelk

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

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.

Article

Whitefish

Whitefish, common name for several freshwater fishes of class Actinopterygii, family Salmonidae (salmon), subfamily Coregoninae (sometimes elevated to family rank).

Article

Wild Berries in Canada

Over 200 species of small, fleshy, wild fruits occur in Canada. Most people consider them all “berries” but, technically, they are classed in different categories. These categories include drupes (e.g. cherries, elderberries), pomes (e.g. saskatoon berries), true berries (e.g. gooseberries, blueberries) and aggregate fruits (e.g. raspberries, strawberries). In this article “berry” is used in its less technical sense. The following are favourite Canadian wild berries.

Article

Wild Geese

Wild Geese, novel credited to Martha Ostenso (London, New York and Toronto, 1925). Published first in England as The Passionate Flight, Wild Geese was one of the Best-Selling Canadian novels of the 20th century.

Article

Wild Horses

Wild horses in western Canada are found primarily in forested areas, typically lodgepole pine woodlands interspersed with pockets of dry grassland, shrubland and sedge meadows.

Article

Wild Rice

Wild rice, a true grass (Zizania aquatica, family Gramineae or Poaceae), grows in marshlands and along waterways from Manitoba to the Atlantic Ocean in southern Canada, and over much of the eastern US.

Article

Wildflowers

There are approximately 4000 species of flowering plants in Canada, of which about 3000 may be considered wildflowers. About one-quarter of these have been introduced from other regions of the world.

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.

Article

Willow

Willow (Salix) is a genus of trees and shrubs of the willow family (Salicaceae). About 300 species occur worldwide, chiefly in the Northern Hemisphere.

Article

Wind

In the atmosphere, between about 1.2 and 1.6 km above the Earth's surface, winds tend to blow parallel to rather than across the lines of equal pressure (isobars).

Article

Wind-scorpion

Wind-scorpions are spiderlike and hairy. Their most striking feature is the enormous chelicerae, which are often about 25% of their body length.