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Eighth Grade (Grade 8) Ecology Questions

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Grade 8 Symbiosis
What type of relationship is represented by an organism catching and eating another?
  1. competition
  2. cooperation
  3. mutualism
  4. predation
Grade 8 Food Chains and Webs
The source of energy that fuels most life on Earth is
  1. oil.
  2. chlorophyll.
  3. the Sun.
  4. DNA.
Grade 8 Conservation and Biodiversity
Scientists are attempting to protect biodiversity by mating animals in zoos or on wildlife preserves using the method of
  1. habitat fragmentation.
  2. captive breeding.
  3. habitat preservation.
Grade 8 Food Chains and Webs
Mushrooms and earthworms are                .
  1. producers.
  2. consumers.
  3. decomposers.
  4. parasites.
Grade 8 Food Chains and Webs
Which organisms are the first step in a food chain?
  1. consumers
  2. decomposers
  3. producers
  4. herbivores
Grade 8 Biotic and Abiotic
Which is an abiotic factor?
  1. lion
  2. water
  3. giraffe
  4. tree
Grade 8 Food Chains and Webs
Which type of organism is found at the bottom of an energy pyramid?
  1. consumer
  2. herbivore
  3. producer
  4. omnivore
Grade 8 Food Chains and Webs
Which description is a characteristic of a heterotroph?
  1. uses energy directly from the Sun
  2. uses chlorophyll to absorb energy
  3. undergoes photosynthesis to create glucose
  4. obtains energy by consuming other organisms
Grade 8 Food Chains and Webs
The food chain of desert organisms consists of
  1. cactus, moth, lizard, and bird.
  2. dolphin, fish, and coral.
  3. grass, deer, and bear.
  4. berries, monkey, and leopard.
Grade 8 Communities, Populations, and Ecosystems
Which factor allows for an increase in population?
  1. immigration
  2. emigration
  3. death
  4. none of the above
Grade 8 Conservation and Biodiversity
What is extinction?
  1. the end of a breed of a species
  2. the end of an organism in a population
  3. the end of a species on Earth
  4. none of the above
Grade 8 Food Chains and Webs
Which one is a heterotroph?
  1. plant
  2. flower
  3. producer
  4. consumer
Grade 8 Food Chains and Webs
What is the ultimate energy source for living organisms?
  1. energy stored in chemical bonds
  2. the Sun
  3. energy stored in cells
  4. nuclear power
Grade 8 Succession
In                     , soil begins to form when lichens and weather break down volcanic rock into smaller pieces.
  1. pioneer species
  2. primary succession
  3. secondary succession
  4. climax communities
Grade 8 Biomes
Which TWO biomes have the most precipitation?
  1. temperate deciduous forest and tropical rain forest
  2. desert and tundra
  3. temperate rain forest and tropical rain forest
  4. taiga and temperate deciduous forest
Grade 8 Communities, Populations, and Ecosystems
A                 is a place where an organism lives.
  1. habitat
  2. prey
  3. predator
  4. decomposer
Grade 8 Communities, Populations, and Ecosystems
What is the maximum number of individuals an ecosystem can support?
  1. population density
  2. carrying capacity
  3. succession limit
  4. habitat maximum
Grade 8 Communities, Populations, and Ecosystems
How are limiting factors and carrying capacity similar?
  1. They both limit the number of animals.
  2. They both allow more animals.
  3. They both kill animals.
  4. They both create more deaths than births.
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