Browse "Nature & Geography"

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Not for Saps: Tree Planting in Alberta

Over a century’s worth of shifting environmental policy means that today, maintaining Canada’s forests is as important as cutting them down. Tree planting is an essential part of this maintenance, and each year thousands of young Canadians trek through rough conditions and remote areas to replant thousands of trees.

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Alder

Alder, tree or shrub of genus Alnus of birch family. The 30 known species are found mainly in the northern hemisphere; 3 are native to Canada.

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Alderfly

Alderfly, small (13-18 mm), dark, soft-bodied insect of order Megaloptera, family Sialidae, found in freshwater habitats bordered by alder.

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Alfalfa

Alfalfa, or lucerne (genus Medicago), is a herbaceous perennial belonging to the legume family and grown as a forage crop.

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Blue-green Algae

Blue-green Algae, now known as Cyanobacteria, are named for the blue-green pigment phycocyanin which along with chlorophyll a gives them a blue-green appearance. This led to Cyanobacteria being called blue-green algae before the kingdom Monera was recognized.

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Algae

They are mostly photosynthetic organisms whose body is termed a thallus (ie; they lack leaves, stems and roots). All the photosynthetic forms possess chlorophyll a as their primary photosynthetic pigment. Algae also form unprotected reproductive structures.

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Allison Pass

Allison Pass, elevation 1,352 metres, is located at kilometre 60, the highest point on the Hope-Princeton Highway (opened 1949) through the Cascade Mountains of southern British Columbia.

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Aluminum

Pure aluminum (Al) is a silver-white, malleable, ductile metal with one-third the density of steel. It is the most abundant metal in the earth's crust.

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Amphibian

Amphibians are members of a group of tetrapod (4-legged) vertebrate animals derived from fishes, and are the common ancestor to mammals and reptiles.

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Planet and Satellite

The diameter of a world is a significant value because, given the same densities, the surface gravity will vary roughly with the diameter. A diameter of 350 km is the approximate dividing line between the larger, near-spherical bodies and the smaller objects of irregular shape.

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Bird Distribution and Habitat

Animals' lives are circumscribed by 2 imperatives: finding food for survival, growth and reproduction and avoiding becoming prey before reproducing. For an animal to occupy a habitat, it must be able to survive and reproduce within it. Birds have evolved many ways of meeting these challenges.

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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.