Photosynthesis and Respiration

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Photosynthesis and Respiration

  1. 1. Photosynthesis and RespirationHow are they related?
  2. 2. PhotosynthesisThe process of photosynthesis is a chemical reaction.It is the most important chemical reaction on our planet.
  3. 3. What is the Process? The process of changing light energy (from the sun or other light source) to chemical energy This energy is stored as sugar (a carbohydrate) Occurs in plants and some algae Plants need light energy, CO 2 , and H 2 O Photosynthesis takes place in the chloroplasts, using chlorophyll, the green pigment in plants
  4. 4. What Happens in thisChemical Reaction?
  5. 5. How Do Scientists Writethis Chemical Reaction? What does this mean? Six molecules of carbon dioxide react with six molecules of water to form 1 molecule of glucose and six molecules of oxygen.
  6. 6. HUH? Plants capture light energy and use that energy to make sugar (which can be changed to starch, a carbohydrate, also) Sunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucose Oxygen is also released in this reaction
  7. 7. Why Is This So Important? We cannot make our own food (glucose, energy), we must get our food from plants. Plants are the first step in the food chain. The oxygen released during photosynthesis is necessary for all living things.
  8. 8. Respiration There are two types:
  9. 9. What is Cellular Respiration? The process of cellular respiration is a chemical reaction.It is the most important chemical reaction in our bodies
  10. 10. What is the Process? Cellular respiration is a process, like photosynthesis. Cellular respiration takes place in the mitochondria. The mitochondria take in nutrients (glucose and oxygen), break them down, and create energy for the cell. This process of creating cell energy is known as cellular respiration. Takes place in all living things
  11. 11. Let’s Write the Chemical EquationGlucose + Oxygen ----  Carbon Dioxide + Water Or another way of writing the equation is:C 6 H 12 O 6 + 6O 2 ---- 6CO 2 + 6H 2 O
  12. 12. Notice Any Similarities?
  13. 13. Notice any now?
  14. 14. Any Similarities with These?
  15. 15. Photosynthesis andRespiration are Related  It is the basic cycle on Earth.

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