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PHOTOSYNTHESIS What we know - Photosynthesis • Producers are organisms that produce their own food. • Green plants are producers – they convert sunlight into energy (food). IN YOUR NOTEBOOK list some green plants. Are green plants only located on land? List some green plants that are found under water. Do they carry out photosynthesis? Radiant Energy Photosynthesis What we are learning today- • Photosynthesis is a chemical reaction, where radiant energy from the sun reacts with water and carbon dioxide to form chemical energy. • Radiant Energy is required for the chemical process to take place. Water 6 H2O Carbon dioxide + 6 CO2 Radiant energy (sunlight) Glucose C6H12O6 Oxygen + 6 O2 • Carbon dioxide and water are the “ingredients” for photosynthesis, and sugar (glucose) is formed, along with oxygen. • The plants use these products (glucose and Oxygen) to produce food and energy or will store them for later use. Photosynthesis • A process that requires carbon dioxide (CO2) and uses Radiant (Light) energy and water (H2O) to produce organic (glucose). photons SUN 6CO2 + 6H2O + RE C6H12O6 + 6O2 Organic glucose In your notebook draw the leaf Use the formula to explain the Process of photosynthesis Label what goes in and what comes out of the leaf What is the leaf making? Will the leaf use the product immediately or will it be used later? Where does this all happen? • To answer this first you must think – Which part of the plant is usually green? • How does Carbon dioxide and water get into that plant part? • How does Radiant energy get captured? Plants • Autotrophs: self-producers. • Location: 1. Leaves a. stoma b. guard cells Stoma Chloroplast Guard Cell Questions: • How does Radiant energy get captured by the leaf? • Where does photosynthesis take place? Chloroplast Draw a chloroplast organelle in your notebook Chloroplast • Organelle (or a pocket) where photosynthesis takes place. • Contains Chlorophyll – Absorbs Radiant (light) Energy Outer Membrane Inner Membrane Chlorophyll Question: • Why are plants green? Chlorophyll Molecules • Chlorophyll pigments (COLOR) absorb energy (photons) by absorbing certain wavelengths (blue-420 nm and red-660 nm are most important). • Plants are green because the green wavelength is reflected, not absorbed.