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Ninth Grade (Grade 9) Ecology Questions

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Grade 9 Food Chains and Webs
Which statement 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 Food Chains and Webs
Which of the following is a true statement about ecosystems?
  1. Ecosystems are easily understood.
  2. Ecosystems are complex with many interlocking parts.
  3. Ecosystems are not affected by human activity.
  4. Ecosystems never adapt or change to new factors.
Grade 9 Symbiosis
When bees gather pollen to eat, they also help to spread that pollen to other plants, fertilizing them. Why is this is a classic example of mutualism?
  1. One organism benefits while another is unaffected.
  2. One organism benefits while another is harmed.
  3. Both organisms benefit.
  4. None of the organisms benefit or harmed.
Grade 9 Biogeochemical Cycles
Where are all the elements found?
  1. in ecology
  2. in the biosphere
  3. in biochemical pathways
  4. in the biogeochemical cycles
Grade 9 Biogeochemical Cycles
Organisms that eat the bodies of dead organisms are called                .
  1. carnivores
  2. detritivores
  3. heterotrophs
  4. omnivores
Grade 9 Communities, Populations, and Ecosystems
Which of the following statements about the organization of an ecosystem is TRUE?
  1. Communities make up species, which make up populations.
  2. Populations make up species, which make up communities.
  3. Species make up communities, which make up populations.
  4. Species make up populations, which make up communities.
Grade 9 Biogeochemical Cycles
In the water cycle, how does water leave the atmosphere and return to Earth's surface?
  1. condensation
  2. evaporation
  3. precipitation
  4. transpiration
Grade 9 Communities, Populations, and Ecosystems
What is ecology?
  1. the study of life
  2. the study of habitats
  3. the study of the environment
  4. the study of interactions between organisms and their environment
Grade 9 Communities, Populations, and Ecosystems
Which situation is a good example of a limiting factor in an ecosystem?
  1. an ecosystem with little to no rain
  2. an organism with no natural predators
  3. an ecosystem with an abundance of nutrients
  4. an ecosystem with plenty of space for population growth
Grade 9 Food Chains and Webs
A(n)                  is an organism that obtains energy form the food it consumes.
  1. autotroph
  2. heterotroph
  3. photosynthesizer
  4. phototroph
Grade 9 Succession
What process results in the development of a new ecosystem where there was not one before?
  1. secondary succession
  2. primary succession
  3. tertiary succession
  4. first succession
Grade 9 Biogeochemical Cycles
In which cycle does carbon dioxide play a large role?
  1. carbon
  2. nitrogen
  3. phosphorus
  4. water
Grade 9 Symbiosis
Which term does NOT refer to a type of symbiotic relationship?
  1. commensalism
  2. mutualism
  3. parasitism
  4. predation
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 Biogeochemical Cycles
The two main processes of the oxygen-carbon cycle are
  1. photosynthesis and carbonation.
  2. transpiration and photosynthesis.
  3. cellular respiration and transpiration.
  4. cellular respiration and photosynthesis.
Grade 9 Conservation and Biodiversity
In an ecosystem, how is biodiversity changing with the size of the region itself?
  1. As the size of the region increases, biodiversity decreases.
  2. As the size of the region increases, biodiversity also increases.
  3. As the size of the region increases, biodiversity fluctuates, both increasing and decreasing.
  4. As the size of the region increases, biodiversity disappears completely.
Grade 9 Biotic and Abiotic
Which of the following biotic factors 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 Biomes
Which biome is expected to be very cold all the time?
  1. desert
  2. temperate
  3. tropical
  4. tundra
Grade 9 Succession
During ecological succession, when are pioneer species found?
  1. during the early stages
  2. during the late stages
  3. at the very end
  4. never
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