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NCSCOS Grade 8 Science - Topic: 8..L.3 Structures and Functions of Living Organisms- Ecosystems

Quiz by NCDPI

Grade 8
Science
North Carolina Standard Course of Study

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9 questions
Show answers
  • Q1
    Which of these organisms is a producer in a marine ecosystem?
    fish
    algae
    worm
    gull
    60s
    8.L.3.2
  • Q2
    Which BEST determines the number of wolves that can live in an area?
    the number of trees in the area
    the amount of snow in the area each year
    the amount of food available in the area
    the number of birds that live in the area
    60s
    8.L.3.1
  • Q3
    What happens to a population and to competition when there is a reduction of living space?
    The population increases as competition decreases.
    The population expands and competition intensifies.
    Competition weakens and the population decreases.
    Competition strengthens while the population contracts.
    60s
    8.L.3.1
  • Q4
    Kudzu vines grow by climbing and wrapping around trees. Trees covered by kudzu can die because they are starved of sunlight. What type of relationship exists between the trees and the kudzu growing on them?
    parasitism
    predator-prey
    competition
    mutualism
    60s
    8.L.3.2
  • Q5
    Consider this food web: Where is the largest amount of energy found in this food web?
    Question Image
    hawk
    grass
    grasshopper
    mouse
    60s
    8.L.3.3
  • Q6
    Which BEST explains the importance of nitrogen in the cycling of energy and matter?
    Nitrogen increases the effectiveness of photosynthesis.
    Nitrogen increases protein production in plants.
    Nitrogen decreases the effectiveness of photosynthesis.
    Nitrogen decreases protein production in plants.
    60s
    8.L.3.3
  • Q7
    If wolves prey on deer for food, what will MOST LIKELY happen to the deer population if wolves are removed from an area where deer live?
    The population of deer will decrease.
    The population of deer will become extinct.
    The population of deer will increase.
    The population of deer will remain the same.
    60s
    8.L.3.2
  • Q8
    Where do plants get most of the energy they need to live and grow?
    sunlight
    soil
    air
    water
    60s
    8.L.3.3
  • Q9
    In a food pyramid, which BEST explains why the number of organisms decreases from one trophic level to the next?
    The consumers are feeding on larger organisms that have less energy.
    The consumers are feeding on smaller organisms that have less energy.
    Consumers at the lower level require more energy than the top-level consumers.
    Consumers at the top level require more energy than the lower-level consumers.
    60s
    8.L.3.3

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