Chapter 2

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Chapter 2
2014-09-23 07:40:12
onscience9 science chapter2 chci

Chapter 2 grade 9 science flasshcards
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  1. Population
    All the individuals of a single species that occupy a certain area at a certain time.

    e.g. The population of humans on earth is about 7 billion
  2. Exponential Growth
    Accelerating growth that creates a J-shaped curve when the population is graphed against time

    e.g. elephants in africa had an exponential growth in population when they started to be protected. Their numbers grew from 1000 to 7500 in 6 Years
  3. Limiting Factors
    A factor that limits the growth, distribution, or amount of a population in an ecosystem.

    e.g. Access to fewer resources, dirty water or food
  4. Carrying Capacity
    The size of a population that can be supported indefinitely by the available resources and services of an ecosystem.

    e.g. No one knows the carrying capacity of humans but it is linked to energy

    e.g. The carrying capacity of the fur seal was 9 thousand in 1945
  5. Ecological Niche
    The way in which an organism occupies a position in an ecosystem, including all the necessary biotic and abiotic factors.

    e.g. Cave for a bat
  6. Predator
    An organism that kills and consumes another organism.

    e.g. osprey eating fish
  7. Prey
    An organism that is eaten as food by a predator.

    e.g. Hawk eating a mouse
  8. Mutualism
    A symbiotic relationship between two species in which both species benefit from the relationship.

    e.g. Algae and coral
  9. Parasite
    An organism who's niche is dependant on a close association with a larger host organism.

    e.g. Brainworm in the while-tailed deer
  10. Competition
    When two or more organisms compete for the same resource in the same location at the same time.

    e.g. Stickleback fish is ontario competing for food in lakes
  11. Sustainable Use
    Use that does not lead to long-term depletion of a resource or affect the diversity of the ecosystem from which the resource is obtained.

    e.g. The use of water is sustainable
  12. Doubling Time
    The period of time that is required for a population to double in size.

    e.g. Earth's currrent doubling time is 60 years. The population will double by 2070
  13. Ecological Footprint
    A measure of the impact of an individual or a population on the environment in terms of energy consumption, land use, and waste production.

    e.g. Canada has the sixth biggest ecological footprint at 7.7 hectares per person
  14. Unsustainable
    A pattern of activity that leads to a decline in the function of an ecosystem.

    e.g. the use of earth's resources
  15. Sustainability
    Use of Earth's resources, including land and water, at levels that can continue forever.
  16. Ecosystem Services
    The benefits experienced by organisms, including humans, that are provided by sustainable sustainable ecosystems.

    e.g. Cycling of nutrients, provision of food and clean water, pollination of crops and natural vegetation
  17. Desertification
    The change of non-desert land into a desert, which may result from climate change or from unsustainable farming or water use.

    e.g. Parts of ontario have suffered from desertification fromunsustainable farming
  18. Ecotourism
    A form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable ecosystems.

    e.g. Whale watching, birdwatching