Browse "Nature & Geography"

Displaying 181-200 of 895 results
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Chickpea

Chickpea (Cicer arietinum L.) is part of the legume family. The two primary centres of origin for chickpea are Southwest Asia and the Mediterranean, while Ethiopia is a secondary centre of origin.

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Chimaera

Chimaera, ratfish, or ghost shark, strange-looking marine fish belonging to the subclass Holocephali, class Chondrichthyes and thus related to sharks and rays.

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Chinook

In Canada, the chinook belt lies almost exclusively within southern and central Alberta. The wind occurs in every season, but it is more distinctive and numerous in the winter, when the unseasonable warming it brings differentiates it from the normal cold winter weather.

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Chipmunk

Chipmunk, diminutive member of the squirrel family belonging to genus Tamias.

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Chiroptera

Chiroptera is the order of mammals (Mammalia) that includes all bats, living (~1200 species) and fossil.

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Chromium

Chromium (Cr) a hard, brittle, silver-white metal (melting point 1875° C), is widely known for its use as decorative trim on home appliances and automobiles. However, its most important use is in the manufacture of stainless STEEL, which typically contains about 20% chromium.

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City Beautiful Movement

Some historians have noted that the City Beautiful Movement in Canada was hampered by the lack of an integrated philosophy and the absence of an articulate national spokesperson. However, the amateur side of the movement was lively and active on the local scene.

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Clam

Clam, common name for any bivalve (hinged shell) mollusc, referring especially to those of economic significance burrowing in beaches or the seafloor.

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Clay

Clay is the common name for a complex group of industrial MINERALS, each characterized by different mineralogy, occurrence and uses.

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Climate

Climate is often defined as average weather, when weather means the current state of the atmosphere. For scientists, climates are the result of exchanges of heat and moisture at the Earth's surface. Because of its size, Canada has many different climates.

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Climate Change

Climate change occurs when long-term weather patterns begin to shift. These periods of change have occurred throughout the Earth’s history over extended periods of time. However, since the Industrial Revolution the world has been warming at an unprecedented rate. Because of this, the current period of climate change is often referred to as “global warming.” Human activities that release heat-trapping greenhouse gases, such as the burning of fossil fuels, are largely responsible for this increased rate of change. The implications of this global increase in temperature are potentially disastrous and include extreme weather events, rising sea levels and loss of habitat for plants, animals and humans. In Canada, efforts to mitigate climate change include phasing-out coal-fired power plants in Ontario and instituting a carbon tax in British Columbia.

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Climate Severity

 Environment Canada devised the climate severity index to rate a locality's climate according to human comfort and well being. The index has a range from 1 to 100, with a score of 1 representing the least severe climate and 100 the most.

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Cloud

  Cloud, visible suspension in the atmosphere composed of tiny water droplets or ICE crystals from about one to a few hundred micrometres in diameter.

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Clover

The "true" clovers (genus Trifolium) are herbaceous plants of the pea family Leguminosae or Fabaceae (see legume) and must be distinguished from bur clovers (Medicago) and sweet clovers (Melilotus) of the same family.

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Club-moss

Club-moss, perennial, evergreen, coarsely mosslike plants belonging to the genera Diphasiastrum, Huperzia, Lycopodiella and Lycopodium of the club-moss family (Lycopodiaceae).

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Cnidaria

Cnidaria, phylum of multicellular, radially symmetrical invertebrates (eg, hydroids, jellyfish, sea anemones, corals) dating to late Precambrian era (630-570 million years ago).

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Coal in Canada

Coal is a fossil fuel that has been used as a source of energy in Canada since the 18th century. Canada is home to 0.6 per cent of the world’s coal resources. Most of the country’s coal reserves (over 95 per cent) are found in AlbertaBritish Columbia and Saskatchewan. In recent years, the environmental movement has opposed the coal industry for disrupting local ecosystems, creating adverse health effects and for its large contribution to the carbon-dioxide emissions that drive climate change. In an effort to curb harmful emissions, the federal government has signalled its intention to phase out traditional coal-fired electricity by 2030, and Alberta has a plan to achieve the same goal as a province.