Recycling of Materials
Energy flows and matter recycles through an ecosystem.
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Identify autotrophs as producers who may use photosynthesis, and describe this as the basis of the food web.
Explain the process of respiration and differentiate between it and photosynthesis.
Know that all organisms, including humans, are part of, and depend on, two main interconnected global food webs: one which includes microscopic ocean plants, and the other which includes land plants.
Describe how matter is recycled within ecosystems and explain that the total amount of matter remains the same, though its form and location change.
Identify carbon, hydrogen, oxygen, nitrogen and phosphorus as common elements of living matter.