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Photosynthesis SWBAT explain how photosynthesis changes light energy into chemical energy; describe photosynthesis, naming the reactants and the products Photosynthesis Photosynthesis – The process that most producer organisms use to change light energy into chemical energy What does photosynthesis require? – Carbon dioxide, water, and light energy What does it produce? – Sugar and oxygen What must be present for photosynthesis to occur? – Special pigments (chlorophyll), organelles (chloroplasts), and enzymes Quick Review What is potential energy? – Stored energy due to an objects position What is kinetic energy? – Energy due to motion How is light energy kinetic energy? – Its motion is harnessed by the plant How is sugar potential energy? – It can be broken down to produce energy Pigments Absorb Light Energy Pigments – Colored substances that absorb light Chlorophyll – A green pigment, and the primary pigment for photosynthesis What organelle does photosynthesis occur in? – Chloroplasts Using Energy How do plants make proteins, lipids, and nucleic acids? – The use the energy stored from photosynthesis to produce these items.