Standards Database Logo
Home | Browse | Search | Purpose | History | Process | Acknowledgment| Reference

 


 


Topic: Populations and ecosystems 

Science

 Standard 6.  Understands relationships among organisms and their physical environment
  Level I (Grade K-2)
   Benchmark 2.Knows that living things are found almost everywhere in the world and that distinct environments support the life of different types of plants and animals
    Knowledge/skill statements
     1.Knows that living things are almost everywhere
     2.Knows that distinct environments support life of different plants
     3.Knows that distinct environments support life of different animals
  Level III (Grade 6-8)
   Benchmark 1.Knows that all individuals of a species that exist together at a given place and time make up a population, and all populations living together and the physical factors with which they interact compose an ecosystem
    Knowledge/skill statements
     1.Knows that a population is all individuals of a species that exist at the same place and time
     2.Knows that an ecosystem is all populations living together and the physical factors they interact with
   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
  Level IV (Grade 9-12)
   Benchmark 1.Knows how the interrelationships and interdependencies among organisms generate stable ecosystems that fluctuate around a state of rough equilibrium for hundreds or thousands of years (e.g., growth of a population is held in check by environmental factors such as depletion of food or nesting sites, increased loss due to larger numbers of predators or parasites)
    Knowledge/skill statements
     1.Knows that interrelationships among organisms generate stable ecosystems
     2.Knows that interdependencies among organisms generate stable ecosystems
     3.Knows that stable ecosystems fluctuate around a state of equilibrium for hundreds of years
     4.Knows that population growth is held in check by environmental factors
     5.Knows that population growth is held in check by the depletion of food
     6.Knows that population growth is held in check by the depletion of nesting sites
     7.Knows that population growth is held in check by an increased number of predators
     8.Knows that population growth is held in check by an increased number of parasites
   Benchmark 2.Knows how the amount of life an environment can support is limited by the availability of matter and energy and the ability of the ecosystem to recycle materials
    Knowledge/skill statements
     1.Knows that the amount of life an environment can support is limited by the availability of matter
     2.Knows that the amount of life an environment can support is limited by the availability of energy
     3.Knows that the amount of life an environment can support is limited by the ability of that ecosystem to recycle material
   Benchmark 5.Knows ways in which humans can alter the equilibrium of ecosystems, causing potentially irreversible effects (e.g., human population growth, technology, and consumption; human destruction of habitats through direct harvesting, pollution, and atmospheric changes)
    Knowledge/skill statements
     1.Knows that humans can alter the equilibrium of ecosystems
     2.Knows that humans can cause irreversible effects
     3.Knows that human population growth can affect the equilibrium of ecosystems
     4.Knows that technology can affect the equilibrium of ecosystems
     5.Knows that consumption can affect the equilibrium of ecosystems
     6.Knows that humans can destroy habitats by direct harvesting
     7.Knows that humans can destroy habitats by pollution
     8.Knows that humans can destroy habitats by atmospheric changes