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Ninth Grade (Grade 9) Communities, Populations, and Ecosystems Questions

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Grade 9 Communities, Populations, and Ecosystems
Which of these refers to a niche?
  1. An environmental factor that tends to limit population size.
  2. n increase in the Earth's average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect.
  3. Unique living arrangement of an organism defined by its habitat, food sources, time of day it’s most active, and other factors.
  4. None of the above
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
A limiting factor that depends on population size is called?
  1. limiting factor
  2. density-dependent limiting factor
  3. completion limiting factor
  4. prediction limiting factor
Grade 9 Communities, Populations, and Ecosystems
Which of the following is a good example of a limiting factor in an ecosystem?
  1. an organism with no natural preditors
  2. an ecosystem with little to no rain
  3. an ecosystem with an abundance of nutrients
  4. an ecosystem with plenty of space for population growth
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Which of these factors increases the size of a population?
  1. birthrate
  2. emigration
  3. death rate
  4. carrying capacity
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Which of the following choices best describes an organism's niche?
  1. how it moves
  2. its breeding behaviors
  3. its habitat
  4. role in its habitat
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
Grade 9 Communities, Populations, and Ecosystems
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