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Topic: Biogeochemical cycles  

Science

 Standard 2.  Understands Earth's composition and structure
  Level IV (Grade 9-12)
   Benchmark 3.Knows that elements exist in fixed amounts and move through the solid Earth, oceans, atmosphere, and living things as part of geochemical cycles (e.g., carbon cycle, nitrogen cycle)
    Knowledge/skill statements
     1.Knows that elements exist on Earth in fixed amounts
     2.Knows that elements move through the solid Earth as part of geochemical cycles
     3.Knows that elements move through the oceans as part of geochemical cycles
     4.Knows that elements move through the atmosphere as part of geochemical cycles
     5.Knows that elements move through living things as part of geochemical cycles
     6.Knows the carbon cycle is a geochemical cycle
     7.Knows the nitrogen cycle is a geochemical cycle
 Standard 6.  Understands relationships among organisms and their physical environment
  Level IV (Grade 9-12)
   Benchmark 3.Knows that as matter and energy flow through different levels of organization in living systems and between living systems and the physical environment, chemical elements (e.g., carbon, nitrogen) are recombined in different ways
    Knowledge/skill statements
     1.Knows that matter flows through different levels of organization in living systems
     2.Knows that matter flows through different levels of organization between living systems and the physical environment
     3.Knows that energy flows through different levels of organization in living systems
     4.Knows that energy flows through different levels of organization between living systems and the physical environment
     5.Knows that in the flow of matter and energy through different levels of organization, chemical elements are recombined in different ways
     6.Knows that carbon and nitrogen are recombined in different ways as matter and energy flow through different levels of organization