• I can list and define four levels of organization in the environment (organism, population, community, ecosystem). 
    I can compare and contrast predator/prey relationships. 
    I can compare and contrast parasite/host relationships. 
    I can construct a food web and understand how energy is transferred between levels in the energy pyramid. 
    I can trace the flow of matter in an ecosystem.
    I can compare and contrast the roles of producers, consumers, and decomposers in an ecosystem. 
    I can define and give examples of living (biotic) and non-living (abiotic) things within an ecosystem. 
    I can explain how changes in biotic and abiotic factors can affect populations in an ecosystem. 
    I can give examples of human activities that affect ecosystems (bacterial resistance, pollution, over-hunting, urban development, deforestation). 
    I can describe patterns and make predictions about ecosystems using maps, satellite images and/or other data sets. 
    I can identify that producers carry out photosynthesis. 
    I can state that photosynthesis requires energy from the sun, water and carbon dioxide to produce sugar and oxygen.
    I can describe how the sugars produced by photosynthesis are used in cellular respiration.