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5 Written Questions

5 Matching Questions

  1. Ecosystems
  2. Nutrient (biogeochemical) cycles
  3. Phosphorus cycle
  4. Omnivores
  5. Biogeochemical cycles
  1. a The pathways by which chemicals circulate through ecosystems that involve both living (biotic) and nonliving (geological) components.
  2. b The elements and compounds that make up nutrients move continually through air, water, soil, rock and living organisms in ecosystems and in the biosphere
  3. c A consumer that eats both producers and other consumers
  4. d All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment
  5. e Cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment

5 Multiple Choice Questions

  1. The earth's liquid water (oceans, lakes, other bodies of surface water, and underground water), frozen water (polar ice caps, floating ice caps, and ice in soil, known as permafrost), and water vapor in the atmosphere. See also hydrologic cycle.
  2. Organisms that produce their own food
  3. Diagram representing the flow of energy through each trophic level in a food chain or food web. With each energy transfer, only a small part (typically 10%) of the usable energy entering one trophic level is transferred to the organisms at the next trophic level. Compare pyramid of biomass, pyramid of numbers.
  4. Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches.
  5. All the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction.

5 True/False Questions

  1. Food chainSeries of steps in an ecosystem in which organisms transfer energy by eating and being eaten.


  2. CarnivoresOrganisms that eat other animals for energy


  3. OrganismsOrganisms that produce their own food


  4. DecomposersOrganisms that eat living producers and/or other consumers for food


  5. AbioticPertaining to life; environmental factors created by living organisms


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