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5 Written questions

5 Matching questions

  1. Greenhouse effect
  2. Carbon cycle
  3. Food chain
  4. Biosphere
  5. Chemosynthesis
  1. a Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten.
  2. b Cyclic movement of carbon in different chemical forms from the environment to organisms and then back to the environment.
  3. c Anticipated increase in Earth's temperature, caused by carbon dioxide (emitted by burning fossil fuels) trapping some of the radiation emitted by the surface.
  4. d The entire portion of Earth inhabited by life; the sum of all the planet's ecosystems.
  5. e Process in which certain organisms (mostly specialized bacteria) extract inorganic compounds from their environment and convert them into organic nutrient compounds without the presence of sunlight. Compare photosynthesis.

5 Multiple choice questions

  1. The recycling of nitrogen in the environment in which nitrogen goes from a gas, to organic compounds in the soil, to proteins in a plant or nitrates, and then is again released into the atmosphere as a gas.
  2. Organisms that use energy from sunlight or inorganic substances to make organic compounds
  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. Pertaining to life; environmental factors created by living organisms
  5. Organisms that produce their own food

5 True/False questions

  1. StratosphereThe layer of Earth's atmosphere that extends from the troposhere to the mesosphere; concentrations of ozone cause it to get warmer as you go up in this layer.


  2. Gross Primary Productivity (GPP)Rate at which all the plants in an ecosystem produce net useful chemical energy; equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (gross primary productivity) and the rate at which they use some of that energy through cellular respiration. Compare gross primary productivity.


  3. AtmosphereThe entire portion of Earth inhabited by life; the sum of all the planet's ecosystems.


  4. ConsumersOrganisms that produce their own food


  5. DetritivoresCommonly digest decomposers that live on, and in, detritus particles, which they chew and grind into even smaller pieces.


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