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TEKS Grade 8 Science - 8.11.A Competing for Biotic and Abiotic Factors

Quiz by Texas Education Agency

Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)

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Measures 1 skill from
Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)


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15 questions
Show answers
  • Q1
    The graph below shows the percent of seeds from two plant species that sprout when grown in water containing different amounts of salt. Which of the following best summarizes the effect of saltwater on these plant species?
    Question Image
    Species 1 can sprout only in freshwater, and Species 2 can sprout only in saltwater.
    Both species can sprout in freshwater and saltwater, but Species 2 can sprout in a higher salt concentration than Species 1.
    Species 1 can sprout only in water with a low salt concentration, but Species 2 is not affected by the salt concentration.
    Both species need salt in their water, but Species 2 needs more salt than Species 1.
  • Q2
    Which organisms in the food web shown above compete for the same food source in this environment?
    Question Image
    Hawks and frogs
    Grasshoppers and snakes
    Frogs and snakes
    Decomposers and grasses
  • Q3
    The Couch’s spadefoot lives in Texas and has the characteristics listed below. The Couch’s spadefoot is adapted to a certain type of environment. Which of these resources is most likely scarce in this environment?
    Question Image
  • Q4
    The graph below shows the range of water conditions preferred by three species of fish in an Ozark stream. Water with which of these conditions would cause the most competition for resources among all three species of fish?
    Question Image
    Mild temperatures, some suspended particles, flows at a medium speed
    Very cold, very clear, and very fast
    Mild temperatures, some suspended particles, flows very fast
    Very warm, very clear, and very slow
  • Q5
    Barnacles are marine organisms that live attached to surfaces as adults. A scientist studies two barnacle species that live on rocks on a coast in Scotland. In some rocky areas Species A is found alone. In other rocky areas Species B is found alone. In still other rocky areas both species are found together. The diagram below shows the two barnacle species on rocks in their habitats. If Species B were removed from the rocky areas it shares with Species A, Species A would most likely inhabit —
    Question Image
    Zone I only
    Zones I and II only
    Zones I, II, and III
    Zone III only

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