Nature & Geography | The Canadian Encyclopedia

Browse "Nature & Geography"

Displaying 646-660 of 932 results

  • Article

    Plankton

    Plankton [Gk planktos, "drifting"], plants and animals, phytoplankton and zooplankton, respectively, that float freely or drift with currents in oceans, freshwater ponds and lakes.

    "https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9" // resources/views/front/categories/view.blade.php
    https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 Plankton

  • Article

    Plant

    The shoot system (stem and leaves) grows upward into the light and is the site of photosynthesis; the root system penetrates the soil, anchors the plant and absorbs necessary water and minerals.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/8c6d96af-79e3-4fb0-bbea-a540ea72e324.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/8c6d96af-79e3-4fb0-bbea-a540ea72e324.jpg Plant

  • Article

    Plant Breeding

    Plant breeding is an applied science, in which knowledge of genetics, pathology, plant physiology, statistics, and molecular biology are used to modify plant species for human needs or preferences.

    "https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9" // resources/views/front/categories/view.blade.php
    https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 Plant Breeding

  • Article

    Plant Classification

    Popular classification usually divides living beings into plants and animals and, sometimes, microbes. Scientific classification long followed a similar system, with 2 principal kingdoms: the animal order and the vegetable order.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/edce9657-3d08-4b7c-b369-aa52cc7f8d79.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/edce9657-3d08-4b7c-b369-aa52cc7f8d79.jpg Plant Classification

  • Article

    Plant Disease

    Plant disease can decrease the economic, aesthetic and biological value of all kinds of plants. Plant pathology (phytopathology) is the study of the nature, causes, prevention and socioeconomic aspects of plant diseases.

    "https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9" // resources/views/front/categories/view.blade.php
    https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 Plant Disease

  • Article

    Traditional Plants and Indigenous Peoples in Canada

    Indigenous peoples in what is now Canada collectively used over a 1,000 different plants for food, medicine, materials, and in cultural rituals and mythology. Many of these species, ranging from algae to conifers and flowering plants, remain important to Indigenous communities today. This knowledge of plants and their uses has allowed Indigenous peoples to thrive in Canada’s diverse environments. Many traditional uses of plants have evolved to be used in modern life by Indigenous and non-Indigenous peoples alike. (See also Indigenous Peoples’ Medicine in Canada.)

    "https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/WildBerries/9342749963_6006fba520_z.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/WildBerries/9342749963_6006fba520_z.jpg Traditional Plants and Indigenous Peoples in Canada

  • Article

    Plate Tectonics

    Plate tectonics is the theory proposing that Earth’s outer rocky shell is divided into seven major and several smaller rigid plates. Forces generated by heat losses from the planet’s interior constantly move the plates about. Plate movements, ongoing over millions of years (see Geological History), open and close ocean basins, generate volcanoes, raise mountains, facilitate accumulation of mineral and petroleum deposits, and influence evolution and climate change. Friction between plates prevents steady motion and stores energy that is released in sudden movements, causing earthquakes. This article is the full-length entry about plate tectonics. For a plain-language summary, please see Plate Tectonics (Plain-Language Summary). 

    "https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/PlateTectonics/PlateTectonicsMapEN.png" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/PlateTectonics/PlateTectonicsMapEN.png Plate Tectonics

  • Article

    Plate Tectonics (Plain-Language Summary)

    Plate tectonics is the theory that rocky plates divide Earth’s surface. The plates move as Earth releases heat from its interior. The movement of plates creates volcanoes and mountains and causes earthquakes. This article is a plain-language summary of Plate Tectonics. If you are interested in reading about this topic in more depth, please see our full-length entry, Plate Tectonics.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/PlateTectonics/PlateTectonicsMapEN.png" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/new_article_images/PlateTectonics/PlateTectonicsMapEN.png Plate Tectonics (Plain-Language Summary)

  • Article

    Platinum

    Platinum (Pt) is the best known of the 6 greyish-white, metallic, platinum group elements, which also include palladium (Pd), iridium (Ir), rhodium (Rh), osmium (Os) and ruthenium (Ru). Platinum and palladium are more commonly used than the other elements in the group.

    "https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9" // resources/views/front/categories/view.blade.php
    https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 Platinum

  • Article

    Plover

    Plover is the common name for a family (Charadriidae) of shorebirds with 2 subfamilies: Charadriinae, including true plovers; and Vanellinae, including lapwings.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/54ed14de-ebc8-46ba-80f7-c4f5bbef4130.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/54ed14de-ebc8-46ba-80f7-c4f5bbef4130.jpg Plover

  • Article

    Plum

    Plum is a common name for certain members of genus Prunus of the rose family, which produce a smooth-skinned, elliptical, heart-shaped, oblong, ovate or round fruit with a flat seed.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/a7b2bcfe-316e-4c50-b69e-69d4fc395472.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/a7b2bcfe-316e-4c50-b69e-69d4fc395472.jpg Plum

  • Article

    Pocket Gopher

    Pocket Gopher (Geomyidae), family of medium-sized, solitary, nonhibernating, subterranean rodents. 

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/369f05da-3657-43ac-8d8f-51afdcb5fc9d.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/369f05da-3657-43ac-8d8f-51afdcb5fc9d.jpg Pocket Gopher

  • Article

    Pocket Mouse

    Pocket Mouse, small, jumping rodent of the North American family Heteromyidae.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/bb3cae34-7af8-4118-acfb-e7bdd5f3128f.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/bb3cae34-7af8-4118-acfb-e7bdd5f3128f.jpg Pocket Mouse

  • Article

    Poison Ivy

    Poison ivy plants can spread by underground stems or seeds. Most are small shrubs (0.5-1 m tall); others are vinelike plants, 15 m or longer, supported by aerial roots. Shrubby forms are sometimes called poison oak.

    "https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9" // resources/views/front/categories/view.blade.php
    https://development.thecanadianencyclopedia.ca/images/tce_placeholder.jpg?v=e9dca980c9bdb3aa11e832e7ea94f5d9 Poison Ivy

  • Article

    Poisonous Plants

    Toxic PropertiesToxic reactions generally are caused by chemical compounds that are produced by plants or absorbed from soil. These compounds produce undesirable physiological responses in individuals or animals.

    "https://d2ttikhf7xbzbs.cloudfront.net/media/media/3118a894-b3ac-4aea-92be-4e8966b78166.jpg" // resources/views/front/categories/view.blade.php
    https://d2ttikhf7xbzbs.cloudfront.net/media/media/3118a894-b3ac-4aea-92be-4e8966b78166.jpg Poisonous Plants