2 What is Photosynthesis? Food-making process of plants and some algae.Changes light energy to chemical energyEnergy stored as sugarTakes place in the chloroplasts, using chlorophyll, the green pigment in plantsMost important chemical reaction on our planet.
5 Overall Steps in Photosynthesis Chlorophyll molecules trap energy from the sunEnergy from sun used to change carbon dioxide gas (CO2) and water (H2O) into a simple sugar called glucose.Oxygen is produced.CO2 + H2O + energy (sunlight) glucose (sugar) + O2
6 Other Photosynthesis Details Carbon dioxide enters the leaf through holes called stomataThe sugar is moved through tubes in the leaf to the roots, stems and fruits of the plantsSome of the sugar is used right away by the plant for energy; some is stored as starch; and some is built into plant tissue
7 What Happens During Photosynthesis? SunlightCarbon DioxideWaterSugarOxygen
8 Why is this important to us? We cannot make our own food (glucose, energy), we must get our food from plants.Oxygen released during photosynthesis is necessary for all living things.Plants are the first step in the food chain.
9 Summary QuestionsWhat are the raw materials needed for photosynthesis? What are the products?How do plants get energy? How do animals get energy?What role does chlorophyll play in photosynthesis? Where is chlorophyll found?List three ways that autotrophs were important to you today.