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Ninth Grade (Grade 9) Ecology Questions

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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 Communities, Populations, and Ecosystems
The study of organisms' interactions with their surroundings is
  1. abiotic
  2. ecology
  3. sociology
  4. microbiology
  5. geology
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 Communities, Populations, and Ecosystems
Which of the following is NOT considered to be a density-dependent factor?
  1. Competition
  2. Predation
  3. Commensalism
  4. Parasitism and disease
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Symbiosis
Grade 9 Biotic and Abiotic
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Food Chains and Webs
What is a producer?
  1. Any organism
  2. Any organism that obtains energy
  3. Any organism that obtains energy from other life forms
  4. Any organism that produces its own food
Grade 9 Food Chains and Webs
Which of the following statements correctly describes an autotroph?
  1. It is an organism that makes its own food.
  2. It is an organism that eats other organisms.
  3. It is an organism that eats decaying matter.
  4. None of the above.
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Biogeochemical Cycles
Grade 9 Food Chains and Webs
What does an herbivore eat?
  1. Plants
  2. Meats
  3. Meats and plants
  4. Decomposing organic matter
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Symbiosis
Grade 9 Communities, Populations, and Ecosystems
A limiting factor that depends on population size is called a(n)
  1. limiting factor
  2. density-dependent limiting factor
  3. completion limiting factor
  4. prediction limiting factor
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