Photosynthesis and Energy Flow in Ecosystems
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Questions and Answers

What percentage of the energy having Photosynthetically Active Radiation is typically used by plants for the process of photosynthesis?

  • 50-60 percent
  • 10-20 percent
  • 2-10 percent (correct)
  • 30-40 percent
  • In what form is the energy stored in various organic products in plants during photosynthesis?

  • Kinetic energy
  • Mechanical energy
  • Heat energy
  • Chemical energy (correct)
  • What happens to the energy when it is converted into heat during the process of energy flow in the ecosystem?

  • Energy is converted back to light energy
  • Energy is stored in the ecosystem
  • Energy is absorbed by plants
  • Energy is lost from the ecosystem (correct)
  • Which consumers receive energy directly from the primary producers in a food chain?

    <p>Primary consumers</p> Signup and view all the answers

    What law states that only about 10 percent of the energy is transferred to each trophic level in a food chain?

    <p>10 Percent Law</p> Signup and view all the answers

    Which organelle in plants is responsible for absorbing sunlight for the process of photosynthesis?

    <p>Chloroplasts</p> Signup and view all the answers

    What is the main source of energy required by all living organisms in an ecosystem?

    <p>Chemical energy of food</p> Signup and view all the answers

    Which law of thermodynamics states that energy can neither be created nor destroyed, only changed from one form to another?

    <p>Second law of thermodynamics</p> Signup and view all the answers

    What is the term used to describe the radiation from the sun that can be used by plants for photosynthesis?

    <p>Effective radiation</p> Signup and view all the answers

    What happens to most of the sun's radiation that falls on Earth?

    <p>It is reflected back into space by the atmosphere</p> Signup and view all the answers

    What term is used to describe each level within a food chain?

    <p>Trophic level</p> Signup and view all the answers

    Which law of thermodynamics states that as energy is transferred, more and more of it is wasted?

    <p>Second law of thermodynamics</p> Signup and view all the answers

    What percentage of energy is typically transferred from one trophic level to the next?

    <p>90%</p> Signup and view all the answers

    Which trophic level represents the primary consumers in an ecosystem?

    <p>Herbivores</p> Signup and view all the answers

    What is the ultimate source of energy on Earth?

    <p>Sun</p> Signup and view all the answers

    What process do plants utilize to convert light energy into chemical energy?

    <p>Photosynthesis</p> Signup and view all the answers

    What are the scavengers responsible for in the food chain?

    <p>Breaking down dead matter</p> Signup and view all the answers

    What do reducers do after absorbing constituents from dead matter in the food chain?

    <p>Release molecules back to the environment</p> Signup and view all the answers

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