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Topic: Ability to support life 

Science

 Standard 2.  Understands Earth's composition and structure
  Level IV (Grade 9-12)
   Benchmark 6.Knows the conditions of Earth that enable it to support life (e.g., force of gravity that enables the planet to retain an adequate atmosphere, intensity of radiation from the Sun that allows water to cycle between liquid and vapor)
    Knowledge/skill statements
     1.Knows that the intensity of radiation from the Sun, which allows water to cycle between liquid and vapor, is a condition of Earth that enables it to support life
     2.Knows that the force of gravity, which enables the retention of an adequate atmosphere, is a condition of Earth that enables it to support life
 Standard 6.  Understands relationships among organisms and their physical environment
  Level III (Grade 6-8)
   Benchmark 2.Knows factors that affect the number and types of organisms an ecosystem can support (e.g., available resources; abiotic factors such as quantity of light and water, range of temperatures, and soil composition; disease; competition from other organisms within the ecosystem; predation)
    Knowledge/skill statements
     1.Knows the factors that affect the number of organisms an ecosystem can support
     2.Knows the factors that affect the types of organisms an ecosystem can support
     3.Knows how the available resources affect the number of organisms an ecosystem can support
     4.Knows how the available resources affect the types of organisms an ecosystem can support
     5.Knows abiotic factors that affect the number of organisms an ecosystem can support
     6.Knows abiotic factors that affect the types of organisms an ecosystem can support
     7.Knows the amount of water affects the number of organisms an ecosystem can support
     8.Knows the amount of water affects the types of organisms an ecosystem can support
     9.Knows the amount of light affects the number of organisms an ecosystem can support
     10.Knows the amount of light affects the types of organisms an ecosystem can support
     11.Knows the range of temperatures affects the number of organisms an ecosystem can support
     12.Knows the range of temperatures affects the types of organisms an ecosystem can support
     13.Knows that soil composition affects the number of organisms an ecosystem can support
     14.Knows that soil composition affects the types of organisms an ecosystem can support
     15.Knows that disease affects the number of organisms an ecosystem can support
     16.Knows that disease affects the types of organisms an ecosystem can support
     17.Knows that competition from other organisms affects the number of organisms an ecosystem can support
     18.Knows that competition from other organisms affects the types of organisms an ecosystem can support
     19.Knows that predation affects the number of organisms an ecosystem can support
     20.Knows that predation affects the types of organisms an ecosystem can support