Science vocab chapter 2

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  1. Population
    • All the individuals of a species that occupy a particular geographic area at a certain time
    • E.g. the population of Kitchener is: 219 153
  2. Exponential Growth
    • Accelerating growth that produces a J-shaped curve when the population is graphed against time
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  3. Limiting Factors
    • A factor that limits the growth, distribution, or amount of a population in an ecosystem
    • E.g. if the winters of a certain ecosystem are uninhabitable for humans, or if there isn’t enough food for a population to survive
  4. Carrying Capacity
    • The size of a population that can be supported by the valuable resources of an ecosystem
    • E.g. an ecosystem that has a limited sustainable food source, but if too many organisms used it, it would run out
  5. Ecological Niche
    • The way in which an organism occupies a position in an ecosystem, including all necessary biotic and abiotic factors
    • E.g. a bats effect on an ecosystem in terms of what it eats, where it lives & what resources it uses
  6. Predator
    • An organism that kills and consumes other organisms
    • E.g. a fox eats animals such as rabbits
  7. Prey
    • An organism that is eaten as food by a predator
    • E.g. a rabbit that is being eaten by a fox
  8. Mutualism
    • A symbiotic relationship between two species in which both species benefit from the relationship
    • E.g. algae and coral, coral give algae a habitat and a steady flow of carbon dioxide, and in return, the algae give the coral by-products of photosynthesis
  9. Parasite
    • An organism whose niche is dependent on a close association with a larger host organism
    • E.g. a tape worm that steals nutrients from their host
  10. Competition
    • When two or more organisms compete for the same resource in the same location at the same time
    • E.g. if two birds are fighting over the same food source, or for the same mate
  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 was obtained
    • E.g. using a resource, not to its quantity limit, but less enough that it can reproduce in time for next harvest
  12. Doubling Time
    • The period of time that is required for a population to double in size
    • E.g. if a village starts with 10 people, and they make 5 people each year, the doubling time would be two years
  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. a Hummer’s ecological footprint is far greater than a Prius’
  14. Unsustainable
    • A pattern of activity that leads to a decline in the function of an ecosystem
    • E.g. an ecosystem with no food is unsustainable
  15. Sustainability
    • Use of earth’s resources, including land and water, at levels that can continue forever
    • E.g. making sure a resource has enough time for it to grow back for another season
  16. Ecosystem Services
    • The benefits experienced by organisms, including humans, that are provided by sustainable ecosystems
    • E.g. Food, nutrients, etc.
  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. if a land were to lose all if it’s water, it would become desert-like
  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. zip-lining from tree to tree or swimming in an ocean
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Science vocab chapter 2
2013-09-24 01:09:00
Science vocab chapter

Science vocab chapter 2
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