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Ninth Grade (Grade 9) Biotic and Abiotic Questions

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Grade 9 Biotic and Abiotic
Grade 9 Biotic and Abiotic
Which of these phrases describes the biotic factors of an ecosystem?
  1. two dissimilar organisms living together, as in mutualism, commensalism, amensalism, or parasitism
  2. any living part of an environment
  3. the number of individual organisms in each trophic level of an ecosystem
  4. an organism that eats only meat
Grade 9 Biotic and Abiotic
Which of these phrases describes the abiotic factors of an ecosystem?
  1. an environmental factor that tends to limit population size
  2. the nonliving physical or chemical conditions of an environment
  3. a species that lived in one place but that has moved to a new geographic location because of human interference
  4. the complete process by which habitat loss results in the division of large, continuous habitats into a greater number of smaller patches of lower total area
Grade 9 Biotic and Abiotic
Which example shows a relationship between an abiotic and biotic factor in an ecosystem?
  1. An insect is food for a salmon.
  2. Water carries a rock downstream.
  3. A tree removes a gas from the air.
  4. A flower makes food for a butterfly.
Grade 9 Biotic and Abiotic
Which of the following is a biotic factor operating within an ecosystem?
  1. The kind of climate in a given region
  2. Carnivores that eat other animals
  3. The concentration of hydrogen gas in the air
  4. The rate of water flow in a body of water
Grade 9 Biotic and Abiotic
A rodent population leaves an ecosystem because of decreased temperatures and increased rain. Which best explains why the rodents left?
  1. an increase in predation
  2. a decrease in parasitism
  3. a change in biotic factors
  4. a change in abiotic factors
Grade 9 Biotic and Abiotic
Which feature is an abiotic factor in an ecosystem?
  1. weather
  2. number of predators
  3. number of producers
  4. presence of decomposers
Grade 9 Biotic and Abiotic
All the living organisms in an environment are
  1. biology.
  2. biotic factors.
  3. biosphere.
  4. population.
Grade 9 Biotic and Abiotic
Living factors in an environment are called
  1. abiotic.
  2. biomes.
  3. biotic.
  4. habitat.
Grade 9 Biotic and Abiotic
All of the following are considered to be abiotic factors EXCEPT
  1. moisture
  2. air currents
  3. predators
  4. temperature
  5. light
Grade 9 Biotic and Abiotic
Which is not a need of an organism?
  1. food
  2. shelter
  3. species
  4. water
Grade 9 Biotic and Abiotic
Which feature is a biotic factor in an ecosystem?
  1. soil
  2. atmosphere
  3. temperature
  4. number of producers
Grade 9 Biotic and Abiotic
Grade 9 Biotic and Abiotic
Which element is a biotic factor that might affect the life of water-dwelling organisms?
  1. pollutants in the water
  2. temperature of the water
  3. speed of the water current
  4. bacterial population in the water
Grade 9 Biotic and Abiotic
What are the two most significant abiotic factors that influence life in a biome?
  1. temperature and precipitation
  2. temperature and pressure
  3. temperature and latitude
  4. latitude and longitude
Grade 9 Biotic and Abiotic
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