Browse "Nature & Geography"

Displaying 781-800 of 900 results
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Sumac

Sumac is a shrub of the genus Rhus of the family Anacardiaceae.

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Sun (Celestial Object)

Beginnings Geological and astronomical evidence suggests that the reactions were triggered 5 billion years ago when the temperature and density at the centre of a condensing cloud of primordial interstellar gas rose to levels where hydrogen atoms fused into helium atoms.

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Sunflower

Sunflower (genus Helianthus), common name for annual or perennial herbaceous plants native to the Western Hemisphere and belonging to the family Compositae.

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Sunken Ships/Shipwrecks

SABLE ISLAND, a crescent-shaped sandbar 300 km east-southeast (160 nautical miles) of Halifax, is also infamous for its shipwrecks, and is known as "the Graveyard of the Atlantic," as its shifting sands have been the site of over 350 such incidents.

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Sustainable Development

The WCED was formed to consider the key issues related to environment and development, and to provide feasible and innovative ideas to deal with them. Sustainable development was proposed to meet this challenge.

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Sutil and Mexicana

In 1792, after exploratory voyages by Spaniards Manuel Quimper (1790) and Francisco de Eliza (1791), the extent of Juan de Fuca Strait remained a mystery. Some still believed the strait held the entry to the fabled Northwest Passage.

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Swallow

The swallow (Hirundinidae) is a small family of birds including about 87 species worldwide, of which 7 breed in Canada.

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Swan

The swan is a large waterfowl with an elongated neck and narrow patch of naked skin in front of the eye.

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Sweet Apple

The sweet apple (Malus pumila) is a cultivated species of the rose family and Canada's most important tree fruit crop.

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Sweet Corn

Sweet corn (Zea mays var. saccharata or rugosa) is an annual vegetable of the grass family.

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Swift

Swift is a common name for about 100 species of birds in 2 closely related families (Apodidae, Hemiprocnidae).

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Tanager

The tanager (Thraupidae) is a family of small songbirds, possibly comprising as many as 413 species.

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Tantramar Marsh

The Tantramar marsh is one of four saltwater tidal marshes covering 20,230 ha on the narrow Chignecto Isthmus that connects New Brunswick and Nova Scotia.

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Termite

Termites are social insects of the infraorder Isoptera. They may be thought of as “social cockroaches,” as they evolved from their wood-eating cockroach ancestors approximately 200 million years ago.

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Tern

 The tern is a medium-sized bird of the GULL family. Terns are usually grey and white; in spring and summer most species have a black cap. Similar to gulls in appearance, terns differ in having more pointed wings and usually a noticeably forked tail.

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Thistle

The thistle (Carduaceae tribe, family Compositae or Asteraceae) is a spiny herbaceous plant with white or purple flowers. There are 800 species worldwide, 46 in Canada (15 native). Native species (none serious WEEDS) are mainly "true" or "plumed" thistles of genus Cirsium.