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TEKS Grade 7 Science - 7.10 - Diagnostic Ecosystems Microhabitats

Quiz by Texas Education Agency

Grade 7
Science (2017)
Texas Essential Knowledge and Skills (TEKS)

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10 questions
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  • Q1
    Warm temperature and an abundance (lots) of rain, plants and animals. What Biome am I?
  • Q2
    What is the most important factor in determining which biome is found in an area?
    Biotic factors
    Soil type
    Animals present
  • Q3
    Tropical rain forests have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?
    The presence of a variety of herbivore species that can feed on a large number of different producer species helps ensure abundant prey for predators in the ecosystem.
    All of these
    The presence of more species with different adaptations makes it more likely that some organisms will survive an ecological disaster.
    Greater genetic variation within species makes it more likely that some individuals will survive a disease outbreak.
  • Q4
    If you cut down trees in an ecosystem, what will likely happen?
    Reduce the variety of organisms living on earth
    Reduce the amount of air pollution
    Increase the number of different ecosystems on earth
    Increase the number of plants living on earth
  • Q5
    Which ecosystem is more biodiversity, and therefore more sustainable?
    The ecosystem with more genetic variation so species can adapt.
    The ecosystem that has more energy because of the autotrophs.
    The ecosystem that has more decomposers to recycle nutrients.
    The ecosystem with more top predators so they need more food.
  • Q6
    An ecosystem that is not sustainable can break down when a natural disaster occurs. This can lead to organisms in the ecosystem either leaving the area or dying off. Increased biodiversity results in a more sustainable ecosystem because —
    a greater number of plant species means that there is less barren land
    the transition area between two ecosystems is narrower
    there are fewer species to be affected by environmental stresses
    a greater variety of species present allows more organisms to adapt after changes occur
  • Q7
    Some students take care of a vegetable garden. When it is time to plant in the spring, the students leave part of the garden empty in order to observe ecological succession. Which of these will most likely occur first?
    Growth of weeds and grasses
    Development of a stream
    Growth of trees and shrubs
    Development of topsoil
  • Q8
    Both primary and secondary succession begin with pioneer species that —
    invade the area so that new organisms cannot be established
    use up all the existing resources and prevent establishment of non-native organisms
    modify the area and allow larger and more complex organisms to appear
    change the area and make it safer from predatory organisms
  • Q9
    Weeds and then small trees, what type of succession are you in....
    Secondary Succession
    Primary Succession
    Biological Succession
    Heterotrophic Succession
  • Q10
    If left unaltered (not changed), what will happen to this ecosystem
    Question Image
    the relocation of many native species
    an ecosystem without any decomposers
    the loss of consumers that cannot be recovered
    a stable ecosystem that can last for many years

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