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  • 1. 6 th Grade Science Chapter 13 The Nonliving Environment Notes Section 13.3 Chimney Rock, North Carolina
  • 2.
    • Can matter be recycled?
    • Matter can be recycled over and over but this process requires energy.
    • Can energy be recycled?
    • Energy is not recycled, but it is converted from one form to another.
    Key Questions 1
  • 3.  
  • 4.  
  • 5.  
  • 6.  
  • 7.
    • How do producers convert energy into food?
    • Most producers convert light energy into food. Some producers convert chemicals like sulfur into food.
    • What is chemosynthesis?
    • The production of energy-rich nutrient molecules from chemicals is called chemosynthesis.
    Key Questions 2 The Tadpole Galaxy
  • 8. Chemosynthesis
    • Not all producers rely on light for energy.
    • During the 1970s, scientists exploring the ocean floor were amazed to find communities
    at a depth of almost 3.2 km and living in total darkness.
  • 9.  
  • 10.  
  • 11.  
  • 12.
    • What is a food chain?
    • A food chain shows how matter and energy pass from one organism to another.
    • What is a food web?
    • A food web is made up of many different food chains.
    Key Questions 3 The Sombrero Galaxy
  • 13. Food Chains
    • Carnivores and omnivores—animals that eat other consumers—are the third and higher steps of food chains.
  • 14.  
  • 15.  
  • 16.
    • What is an energy pyramid?
    • Energy pyramids show the amount of energy available at each feeding level.
    • How does the available energy change at each level of the energy pyramid?
    • The amount of available energy decreases from the base to the top of the energy pyramid.
    Key Questions 4
  • 17. Food Webs
    • A food web is made up of many different food chains.
    • A food web is a model that shows all the
    possible feeding relationships among the organisms in a community.
  • 18. Available Energy
    • The bottom of the pyramid, which represents all of the producers, is the first feeding level.
    • An energy pyramid shows the amount of
    energy available at each feeding level in an ecosystem.
  • 19. Available Energy
    • Only about ten percent of the energy available at each feeding level of an energy pyramid is transferred to next higher level.
    • As you move up the pyramid, the transfer of
    energy is less efficient and each level becomes smaller.
  • 20.  
  • 21.
    • Compare and contrast a food web and an energy pyramid.
    • Explain why there is a limit to the number of links in a food chain.
    • Use your knowledge of food chains and energy pyramid to explain why the number of mice in a grassland ecosystem is greater than the number of hawks.
    Questions Section 13.3