Food for Plants

1. Food for Plants

2. Cellular Energy (Photosynthesis & Cellular Respiration)An Introduction

3. What is Photosynthesis? The processof photosynthesis is a chemical reaction. The process of converting light energy to make chemical energy (glucose) It is the most important chemical reaction on our planet.

4. Prefix/Suffix: Photosynthesis “Photo” means light “synthesis” means to make

5. Who & where does it take place? • Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs • Photosynthesis occurs in chloroplasts of the plant cell in the leaves of a plant. -Inside the chloroplasts is a green pigment called chlorophyll that captures light.

6. CHOLORPLAST

7. Carbon Dioxide Water Glucose Oxygen Chemical reaction of photosynthesis? Light Energy 6CO2 6H2O C6H12O66O2 Products (MAKE) Reactant (NEED)

8. 2. What Happens During Photosynthesis? Plants capture light energy and use that energy to make glucose Sunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucose Oxygen is also released in this reaction Carbon dioxide enters the leaf through holes called stomata

9. 2. What Happens During Photosynthesis? • CO2combines with the stored energy in the chloroplasts through a chemical reaction to make glucose • The sugar is moved through tubes in the leaf to the roots,stems (Shoots) and fruits of the plants • Some of the sugar is used right away by the plant for energy; some is stored as starch; and some is built into plant tissue such as cellulose

10. 3.Why is This Important to Us? • We cannot make our own energy (glucose), we must get our energy from plants.It is a carbohydrate used for quick fuel. • Organisms, such as plants and animals, take glucose and change it into ATP energy during cellularrespiration. • Plants are the first step in the food chain. • The oxygen released during photosynthesis is necessary for all living things.

11. Cellular Respiration1. What is Cellular Respiration? • Once the energy that was in sunlight is changed into chemical energy by photosynthesis, an organism has to transform the chemical energy into a form that can be used by the organism. • This process is cellular respiration.

12. 2. Who & where does it take place? • Takes place in ALL living things- bacteria, plant, protists, fungi, AND animal • Cell respiration occurs in “MIGHTY” MITOCHONDRIA ineukaryotic cells.

13. 3. Describe Cellular Respiration • Definition: The process of breaking down glucosemolecules to release cellularATP energy • Respiration means “to breathe” -AEROBICrespiration when oxygenis used -ANAEROBICrespiration when NOoxygenis used (aka fermentation) • Is a step by step process: • Glycolysis • Krebs Cycle/Citric Acid Cycle • Electron Transport Cycle

14. Light vs Dark

15. 2 ATP 32-34 ATP 2 ATP 2 ATP

16. Review Cellular Respiration • All living things need ENERGY Energy in the form of… Glucose = chemical energy Cell energy=ATP

17. Figure 8-3 Comparison of ADP and ATP to a Battery Section 8-1 ADP – Low energy ATP – high energy Energy Energy Adenosine diphosphate (ADP) + Phosphate Adenosine triphosphate (ATP) Partially charged battery Fully charged battery

18. Carbon Dioxide Water Glucose Oxygen C6H12O66O2 6CO2 6H2O 4. What is the Equation for Cellular Respiration?

19. Comparing Photosynthesis & Cellular RespirationThe product of one process is the reactant of the other! *flip flop • Photosynthesis storesenergy into glucose- Cell Respiration releasesenergy from glucose • Photosynthesis removes CO2 and respiration returns it.

20. Carbon Cycle

24. Process of ATP to ADP

25. In class activity: All classes