1. The photosynthesis equation
Write the chemical equation for photosynthesis in words…
Then write the equation again using molecular formulas…
Then balance the chemical equation using coefficients…
Word Bank:
Sunlight Water Glucose
Carbon dioxide Oxygen

2. Photosynthesis:
Plants use the energy of sunlight to convert water and carbon dioxide into high energy sugars and oxygen

3. II. Chemical Equations
Chemical equations have two parts…. Reactants Products - The raw materials -What are made

4. II. Chemical Equations
Atoms are rearranged to form new products

5. The photosynthesis equation:
The Reactants: The Products: Carbon dioxide & Water Glucose and Oxygen

6. III. What do plants use sugars for?
Sugars meet the plants energy needs
Builds complex carbohydrates (cellulose) for growth

7. V. How do plants capture the energy of sunlight?
What is sunlight made of? “white light” is made of Different wavelengths of light

8. How do plant capture the energy of sunlight?
Plants use light-absorbing molecules called pigments to absorb sunlight. A plants main pigment is called chlorophyll

9. Concept Check:
What does chlorophyll do for plants? Absorb light-energy.

10. Which two colors do the chlorophyll molecules absorb most?
1. Blue/violet
2. Red
Absorption

11. What color is not absorbed?
1. Green
Absorption

12. What happens to the color not absorbed by the plant?

13. Green light is reflected back to your eyes

14. ANTHOCYANIN
CAROTENOIDS
CHLOROPHYLL A
CHLOROPHYLL B
XANTHOPHYLL

15. VII. Where does light-absorption occur?
Plant Plant Cells Chloroplast

16. VII. Chloroplast Structure
Chloroplasts have a double-membrane Chlorophyll pigments are found in chloroplasts

17. A Musical Summary

18. Limiting Factors
Brainstorm as many factors as you can that limits how many touchdowns a quarter back can throw:

19. Limiting Factors
A limiting factor limits how fast a reaction can happen In photosynthesis, a limiting factor would limit how fast products are made -glucose and oxygen

20. Limiting Factors of Photosynthesis
Water
-Water is necessary for photosynthesis
-Less water can slow or stop photosynthesis

21. Limiting Factors of Photosynthesis
Water
-What happens to grass during a drought?
-How do desert plants attempt to reduce water loss?

22. Limiting Factors of Photosynthesis
2. Temperature -Photosynthesis works best between 0-35 degrees Celsius -Temperatures too high or low can slow or stop photosynthesis

23. Limiting Factors of Photosynthesis
3. Intensity of Light -High light intensity increases rate of photosynthesis -Low light intensity decreases rate of photosynthesis

24. Limiting Factors of Photosynthesis
3. Intensity of Light When (in the year) is the sunlight most intense in Missouri? When do the plants have the highest rate of photosynthesis?

25. Limiting Factors Summary
The following factors can limit the rate of photosynthesis: 1. Water 2. Temperature 3. Light intensity