Identify autotrophs as producers who may use photosynthesis, and describe this as the basis of the food web.
Energy flows and matter recycles through an ecosystem.
Recycling of Materials
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Explain how insects and various other organisms depend on dead plant and animal matter for food; and describe how this process contributes to the system.
Describe the process of photosynthesis and explain that plants can use the food they make immediately or store it for later use.
Using food webs, identify and describe the ways in which organisms interact and depend on one another in an ecosystem.
Describe how energy is transferred in an ecosystem through food webs; and explain the roles and relationships between producers, consumers and decomposers.
Recognize that one of the most general distinctions among organisms is between plants, which use sunlight to make their own food, and animals, which consume energy-rich foods.