2011 - Science 20f - Final Exam

40 Questions

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Science Quizzes & Trivia

Read every question carefully. Answer all questions. Save a copy of the exam before you submit; name it: Science20F Final Exam. Remember, note taking is very important for your future success. All fill in the blanks questions should be answered in lowercase. Do not put a period at the end of your answers.


Questions and Answers
  • 1. 
    The area of Canada with limited precipitation, few large plants, permafrost, and cold winter is called the __________ biome.
  • 2. 
    The original source of energy for most ecosystems on earth is _________.
  • 3. 
    Within a food web, plants are classified as __________ and animals as ___________.
  • 4. 
    In a food web, organisms that break down organic matter, returning nutrients to the ecosystem for further growth, can be classified as _____________.
  • 5. 
    A group of animals of the same species, and living in the same area, is called a __________.
  • 6. 
    An area in which organisms interact with the physical environment (abiotic factors) is called an ______________.
  • 7. 
    _____________ factors, such as sunlight and wind, influence organisms within an ecosystem.
  • 8. 
    The largest population of a species that an ecosystem can support is called that.
    • A. 

      The top carnivore

    • B. 

      The top capacity

    • C. 

      The carrying capacity

    • D. 

      The carrying population

    • E. 

      None of the above

  • 9. 
    The increasing concentration of a toxin in organisms as you move up the food chain is referred to as _________________________.
  • 10. 
    At various stages in the decay process, bacteria breakdown nitrates to nitrites, and then to nitrogen gas in a process called _______________________.
  • 11. 
    If fertilizers are carried from the land to an aquatic ecosystem with spring runoff, the population of algae will decrease.
    • A. 

      True

    • B. 

      False

  • 12. 
    A rapid increase of the deer population always indicates the ecosystem is healthy.
    • A. 

      True

    • B. 

      False

  • 13. 
    If the birth rate increases while the death rate and immigration remain the constant, the population will increase.
    • A. 

      True

    • B. 

      False

  • 14. 
    Biotic potential is the minimum number of offspring that a species could produce, if resources were unlimited.
    • A. 

      True

    • B. 

      False

  • 15. 
    Boreal forests receive less precipitation than tundra.
    • A. 

      True

    • B. 

      False

  • 16. 
    In general, warmer biomes have greater biodiversity.
    • A. 

      True

    • B. 

      False

  • 17. 
    The change in vegetation as you move in latitude from south to north is similar to climbing a mountain.
    • A. 

      True

    • B. 

      False

  • 18. 
    Removing plants from an area win increase the fertility of the soil.
    • A. 

      True

    • B. 

      False

  • 19. 
    Lakes that are covered by a thick layer of ice contain more oxygen than open lakes during the winter time.
    • A. 

      True

    • B. 

      False

  • 20. 
    A step-by-step sequence showing how organisms feed on each other is referred to as:
    • A. 

      An ecosystem

    • B. 

      A food pyramid

    • C. 

      A population

    • D. 

      A food chain

  • 21. 
    Fungi, mushrooms, and bread mould are all:
    • A. 

      Producers

    • B. 

      Herbivores

    • C. 

      Carnivores

    • D. 

      Decomposers

  • 22. 
    An example of an endangered Canadian species is:
    • A. 

      Passenger pigeon

    • B. 

      Eastern cougar

    • C. 

      Atlantic cod

    • D. 

      Black bear

    • E. 

      None of the above

  • 23. 
    There are 2000 white-tailed deer in a 100 km square forest. This description is of a deer:
    • A. 

      Community

    • B. 

      Population

    • C. 

      Biome

    • D. 

      Species

  • 24. 
    • A. 

      Competition between species

    • B. 

      Predator-prey relationships

    • C. 

      Birth rate

    • D. 

      Ecological niche

    • E. 

      None of the above

  • 25. 
    Which organism would be part of a population that would have the least biomass?
    • A. 

      Beetle

    • B. 

      Spider

    • C. 

      Sparrow

    • D. 

      Hawk

  • 26. 
    • A. 

      Maple tree

    • B. 

      Beetle

    • C. 

      Spider

    • D. 

      Sparrow

  • 27. 
    • A. 

      Beetle

    • B. 

      Spider

    • C. 

      Sparrow

    • D. 

      Hawk

  • 28. 
    Green plants are referred to as autotrophs, meaning they:
    • A. 

      Convert ammonia into nitrates.

    • B. 

      Carry out photosynthesis.

    • C. 

      Feed on primary consumers.

    • D. 

      Occupy the top of a food pyramid.

  • 29. 
    The time of day that an animal is most active is not part of its ecological niche.
    • A. 

      True

    • B. 

      False

  • 30. 
    The albedo effect is the measure of sunlight absorbed by an object.
    • A. 

      True

    • B. 

      False

  • 31. 
    Bacteria are inorganic organisms that help with the cycling of matter in ecosystems.
    • A. 

      True

    • B. 

      False

  • 32. 
    Water, carbon dioxide, and ammonia are all inorganic compounds.
    • A. 

      True

    • B. 

      False

  • 33. 
    Photosynthesis has water as a reactant and oxygen as a product.
    • A. 

      True

    • B. 

      False

  • 34. 
    Cellular respiration has glucose as a reactant and carbon dioxide as a product.
    • A. 

      True

    • B. 

      False

  • 35. 
    Nitrogen fixation converts nitrates into nitrogen gas.
    • A. 

      True

    • B. 

      False

  • 36. 
    Moss loves acidic soils. In other words, a soil with a pH above 7.
    • A. 

      True

    • B. 

      False

  • 37. 
    Density-independent-factors affect members of a population regardless of population density.
    • A. 

      True

    • B. 

      False

  • 38. 
    Permafrost is a layer of soil that thaws only in the summer time in the tundra biome.
    • A. 

      True

    • B. 

      False

  • 39. 
    Humus contains only animal decomposing matter.
    • A. 

      True

    • B. 

      False

  • 40. 
    A lake that is typically deep and cold is known as:
    • A. 

      Oligotrophic

    • B. 

      Eutrophic

    • C. 

      Epilimnion

    • D. 

      None of the above