1. Food for Plants

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

3. What is Photosynthesis?
The process of 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. Chemical reaction of photosynthesis?
Light Energy
Carbon
Dioxide
Water
Glucose
Oxygen
6CO H2O C6H12O O2
Reactant (NEED)
Products (MAKE)

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?
CO2 combines 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 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 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 cellular respiration.
Plants are the first step in the food chain.
The oxygen released during photosynthesis is necessary for all living things.

11. Cellular Respiration 1. 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 in eukaryotic cells.

13. 3. Describe Cellular Respiration
Definition: The process of breaking down glucose molecules to release cellular ATP energy
Respiration means “to breathe”
-AEROBIC respiration when oxygen is used
-ANAEROBIC respiration when NO oxygen is 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. 4. What is the Equation for Cellular Respiration?
Carbon
Dioxide
Water
Glucose
Oxygen
C6H12O O CO H2O

19. Comparing Photosynthesis & Cellular Respiration The product of one process is the reactant of the other! *flip flop
Photosynthesis stores energy into glucose- Cell Respiration releases energy from glucose
Photosynthesis removes CO2 and respiration returns it.

20. Carbon Cycle

24. Process of ATP to ADP

25. In class activity: All classes