Browse "Nature & Geography"

Displaying 586-600 of 740 results

  • Article

    Saskatoon Berry

    Saskatoon berry (Amelanchier alnifolia) is a deciduous native shrub that grows from western Ontario to British Columbia and the Yukon. The city of Saskatoon takes its name from a Cree word for the sweet, fleshy fruits, which were of prime importance to Indigenous peoples and early settlers. On the prairies, saskatoons were a major ingredient in pemmican. Saskatoons are very hardy plants that can survive winter temperatures of -50 to -60º Celsius with a lifespan of 30 to 50 years. Plant size ranges from a small to large shrub or tree 4 to 6 m high. The Saskatoon berry is the provincial fruit of Saskatchewan. (See also Provincial and Territorial Emblems; Provincial Floral Emblems.)

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  • Article

    Sawfly

    Sawfly, common name for members of insect order Hymenoptera, which resemble wasps and are characterized by the lack of a marked constriction between the first and second abdominal segments.

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  • Article

    Saxifrage

    Flowers, mostly small, commonly white or yellow, are borne as terminal clusters on hairy stalks. Plants form tufted, spreading cushions, frequently giving striking patches of colour. S.

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  • Article

    Scallop

    Scallop is a bivalve (hinged shell) mollusc of suborder Pectinina. Scallops are found in all seas. 

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  • Article

    Scorpion

    A scorpion is a carnivorous and venomous arthropod of the class Arachnida, order Scorpiones. Known from fossils 425-450 million years old, scorpions are among the oldest terrestrial animals.

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  • Article

    Scotian Shelf

    Scotian Shelf, a 700 km section of the Continental Shelf off Nova Scotia. Bounded by the Laurentian Channel on the NE, and Northeast Channel and the Gulf of Maine on the SW, it varies in width from 120 to 240 km; the average depth is 90 m.

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  • Article

    Sculpin

    Sculpin is one of the many common names given to the fish family Cottidae and its close relatives. The group, comprising over 300 species, is one of the dominant faunal components of the North Pacific Ocean, where it is believed to have evolved. Sculpins also occur in the Arctic and North Atlantic oceans; a few have penetrated to the southwest Pacific, South American and southern African waters. Freshwater forms occur in temperate and arctic waters of North America, Europe and Asia. Marine sculpins are found from intertidal waters to depths of several hundred metres; most inhabit relatively shallow waters (100 m or less). Freshwater forms generally live in shallow water. Most sculpins are bottom-living; a few occupy pelagic or mid-water habitats. About 63 species occur in Canadian waters, mostly on the west coast; a few in rivers and lakes throughout the country. 

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  • Article

    Sea Ice

    Sea ice formed by the freezing of seawater and floats on the surface of the polar oceans. Its coverage varies with the seasons; in the Northern Hemisphere sea ice ranges from a minimum of about 9 million km2 in September to a maximum of about 16 million km2 in March. In the Southern Hemisphere the range is from 3 million to 19 million km2, with the minimum and maximum coverage occurring in February and September respectively. The thickness of sea ice can vary from a few centimetres for newly formed ice in protected locations to 20 m or more in ridges; however, typical thicknesses are about 3 m in the Arctic and about 1 m in the Antarctic.

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  • Article

    Sea Lion

      The northern sea lion, also called the Steller sea lion (Eumetopias jubatus), is the largest of the eared SEALS.

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  • Article

    Sea Urchin

    Sea Urchin, radially symmetrical marine invertebrate. Sea urchins and near relatives, the sand dollars and heart urchins, belong to class Echinoidea of phylum Echinodermata.

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  • Article

    Seabird

    Seabirds are those bird species which spend long periods away from land and obtain all or most of their food from the sea while flying, swimming or diving, and occupy all of the world's oceans.

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  • Article

    Seal

    Seal is a common name given to a diverse group of aquatic, generally marine mammals of the order Pinnipedia.

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  • Article

    Seashell

    Shell is a hard covering made primarily of calcium carbonate, secreted by invertebrate animals (eg, molluscs, barnacles, sea urchins).

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  • Timelines

    Seasons in Canada

    Being a large country spanning a wide variety of ecosystems, Canada experiences broad seasonal variation from coast to coast to coast. This timeline marks some of the most iconic yearly natural and astronomical events in Canada. Did you know? Phenology is the study of cycles and seasonal shifts in nature. This can include the study of when birds migrate, when plants flower or when certain climate phenomena occur. 

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  • Article

    Seaweeds

    Seaweeds are multicellular marine algae, visible to the naked eye. They extend from the uppermost reaches of sea spray on the shore to the lower limits of light beneath the surface of the water.

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