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Eighth Grade (Grade 8) Ecology Questions

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Grade 8 Food Chains and Webs
What statement about energy pyramids is true? (Select all that apply.)
  1. The greatest amount of energy is available at the producer level.
  2. At each higher level of the pyramid, there is more energy available.
  3. About half the energy at one level is transferred to the next.
  4. Most food webs have only three or four feeding levels.
Grade 8 Biomes
In a deciduous forest,
  1. ferns and wild flowers are abundant.
  2. there is ample food for deer and smaller animals.
  3. many birds migrate southward when winter comes.
  4. all of the above
Grade 8 Food Chains and Webs
A meat eater that eats secondary consumers is a
  1. primary consumer.
  2. secondary consumer.
  3. tertiary consumer.
  4. quaternary consumer.
Grade 8 Food Chains and Webs
A lion hunts and kills other organisms to obtain energy. What type of organism is the lion?
  1. unicellular
  2. photosynthetic
  3. autotroph
  4. heterotroph
Grade 8 Communities, Populations, and Ecosystems
A                 describes the relational position of a species or population in an ecosystem.
  1. competition
  2. symbiosis
  3. prey
  4. niche
Grade 8 Communities, Populations, and Ecosystems
Which is NOT a population limiting factor?
  1. food
  2. water
  3. space
  4. sunlight
Grade 8 Food Chains and Webs
Which are NOT considered heterotrophs?
  1. herbivores
  2. carnivores
  3. decomposers
  4. producers
Grade 8 Food Chains and Webs
Mushrooms and earthworms are                .
  1. producers
  2. consumers
  3. decomposers
  4. parasites
Grade 8 Food Chains and Webs
The two top predators of the deciduous forest are bears and cougars. They make up the                      of this biome.
  1. tertiary consumers.
  2. secondary consumers.
  3. primary consumers.
  4. none of the above
Grade 8 Biomes
Which description does NOT describe a tundra biome?
  1. frozen subsoil
  2. high winds
  3. short growing season
  4. large diversity of plants
Grade 8 Food Chains and Webs
Which is most likely to be a primary consumer?
  1. herbivore
  2. carnivore
  3. omnivore
  4. multivore
Grade 8 Communities, Populations, and Ecosystems
What is the difference between an ecosystem and a biosphere?
  1. An ecosystem is all living and nonliving organisms in an area, and a biosphere is one plant or animal.
  2. An ecosystem is more than one organism that is the same species, and a biosphere is where all living things live.
  3. An ecosystem is all living organisms and nonliving things in an area, and a biosphere is where all living organisms and their surroundings are.
  4. An ecosystem is more than one organism of different species, and a biosphere is something that is eaten by another organism.
Grade 8 Food Chains and Webs
What is a characteristic that plants share?
  1. autotrophic
  2. heterotrophic
  3. prokaryotic
Grade 8 Biomes
Which biome is the most biologically diverse in the world?
  1. tropical rain forest
  2. temperate deciduous forest
  3. grasslands
  4. taiga
Grade 8 Food Chains and Webs
What statement about food webs is true? (Select all that apply.)
  1. Producers are at the top of the food web.
  2. All first-level consumers are carnivores.
  3. Second-level consumers may be carnivores or omnivores.
  4. An organism may play more than one role in a food web.
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