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Eighth Grade (Grade 8) Ecology Questions

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Grade 8 Communities, Populations, and Ecosystems
Competition for food, living space, or other resources can                         .
  1. limit population growth
  2. cause exponential growth
  3. stop symbiosis
  4. create a new ecosystem
Grade 8 Food Chains and Webs
Which type of organism breaks down the cells of dead organisms?
  1. producer
  2. consumer
  3. decomposer
  4. omnivore
Grade 8 Conservation and Biodiversity
                occurs when a species dies out.
  1. Genotype
  2. Evolution
  3. Heredity
  4. Extinction
Grade 8 Food Chains and Webs
What organism cannot make its own food?
  1. heterotroph
  2. chemotroph
  3. producer
  4. autotroph
Grade 8 Conservation and Biodiversity
A community of plants that is relatively stable and has reached the end stage of ecological succession is a(n)
  1. climax community.
  2. biome.
  3. ecosystem.
  4. habitat.
Grade 8 Food Chains and Webs
Secondary consumers are also known as herbivores.
  1. True
  2. False
Grade 8 Food Chains and Webs
Which is an autotroph?
  1. producer
  2. consumer
  3. scavenger
  4. decomposer
Grade 8 Symbiosis
What are the three types of symbiotic relationships between organisms?
  1. commensalism, parasitism, predator
  2. commensalism, mutualism, prey
  3. commensalism, mutualism, parasitism
  4. mutualism, parasitism, consumer
Grade 8 Food Chains and Webs
Predators such as foxes, owls, woodpeckers, and skunks make up the                     of a deciduous forest.
  1. tertiary consumers
  2. secondary consumers
  3. primary consumers
  4. producers
Grade 8 Communities, Populations, and Ecosystems
An ecosystem goes through a flood. This bad weather event is an example of a
  1. niche.
  2. biotic factor.
  3. climax community.
  4. limiting factor.
Grade 8 Food Chains and Webs
Which organism is an example of an autotroph?
  1. oak tree
  2. butterfly
  3. mushroom
  4. dog
Grade 8 Food Chains and Webs
Organisms such as green plants or algae are
  1. decomposers.
  2. herbivores.
  3. consumers.
  4. producers.
Grade 8 Food Chains and Webs
Organisms that feed only on other consumers are
  1. herbivores.
  2. omnivores.
  3. carnivores.
  4. predators.
Grade 8 Food Chains and Webs
A primary consumer is a                                          .
  1. meat eater that eats primary consumers.
  2. plant eater that eats tertiary consumers.
  3. plant eater that eats producers.
  4. meat eater that eats secondary consumers.
Grade 8 Biomes
Which biome is ideal for growing crops and raising sheep and cattle?
  1. grassland
  2. taiga
  3. temperate deciduous forest
  4. temperate rain forest
  5. freshwater
Grade 8 Food Chains and Webs
A(n)                 is the depiction of what eats what.
  1. food web
  2. biosphere
  3. decomposer
  4. energy pyramid
Grade 8 Food Chains and Webs
Why does a food chain begin with plants?
  1. They produce food from light energy, carbon dioxide, and water.
  2. All the species of the ecosystem depend on them for food.
  3. They do not depend on other living creatures for food.
  4. All of the above
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