Browse "Nature & Geography"

Displaying 736-750 of 933 results

  • Article

    Salmon

    The salmon is a family of fish, Salmonidae [Lat salire, "to leap"], with soft fin rays, a short dorsal fin, an adipose (fatty) fin, and teeth in the jaws.

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  • Article

    Salt

    Sodium chloride (NaCl), or common salt, is ubiquitous in the environment. In its solid form, salt crystallizes as colourless cubes and is called rock salt. Salt is also known to geologists as halite. Its crystal structure was the first to be determined by X-rays.

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  • 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.

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  • Article

    Sandpiper

    Sandpiper is the common name for family Scolopacidae of shorebirds.

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  • Article

    Sardine

    Sardine, name applied to various small fishes packed in oil. 

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  • Article

    Saskatoon Berry

    Saskatoon berry (Amelanchier alnifolia) is a deciduous native shrub that grows from western Ontario to British Columbia and the Yukon. 

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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

    Scale Insect

    Scale Insect, highly specialized insect belonging to order Hemiptera, suborder Homoptera, super-family Coccoidea.

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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

    Scorpionfish

    Scorpionfish, or rockfish (Scorpaenidae), family of bottom-dwelling, marine fishes with large heads, mouths and eyes, stout bodies and large pectoral fins. 

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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

    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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