Clarification Statement - S.HS.LS.2.3.CS:
Emphasis is on conceptual understanding of the role of aerobic and anaerobic respiration and photosynthesis within ecosystems.

Assessment Boundary - S.HS.LS.2.3.AB:
Assessment does not include the specific chemical processes of either aerobic or anaerobic respiration, and photosynthesis.

Science and Engineering Practices - 9-12.SEP6.2:
Construct and revise an explanation based on valid and reliable evidence obtained from a variety of sources (including students’ own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the na

Disciplinary Core Ideas - S.HS.LS.2.3.DCI:
LS2.B: Cycles of Matter and Energy Transfer in Ecosystems •Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes.

Crosscutting Concepts - CC5.14:
Energy drives the cycling of matter within and between systems.