1. Photosynthesis

2. How do we grow a plant? But is that all????

3. Plants need to do Photosynthesis Chlorophyll inside

4. What you don’t see…

5. Photosynthesis- what goes in? Sunlight (light Energy) Water H 2 O Carbon Dioxide CO 2

6. Photosynthesis- what comes out? Sunlight (Light Energy) Water H 2 O Carbon Dioxide CO 2 Glucose C 6 H 12 O 6 Oxygen O 2

7. Photosynthesis Let’s write the chemical equation on the board!! Let’s write the chemical equation on the board!! What are the reactants, What are the products? What are the reactants, What are the products?

8. Reaction CO 2 + H 2 O + light  O 2 + C 6 H 12 O 6 CO 2 + H 2 O + light  O 2 + C 6 H 12 O 6 But it’s not balanced But it’s not balanced 6 CO 2 + 6 H 2 O + light  6 O 2 + C 6 H 12 O 6 6 CO 2 + 6 H 2 O + light  6 O 2 + C 6 H 12 O 6 Reactants Products What type of energy transformations are going on?

9. Photosynthesis has an “opposite” reaction… ALL cells must perform this reaction ALL cells must perform this reaction –(not like photosynthesis that only occurs in autotrophs) –Occurs in Mitochondria –It’s why we breathe In fact the name we give to breathing is named after this cellular process In fact the name we give to breathing is named after this cellular process –Any guesses???

10. Cell Respiration Glucose C 6 H 12 O 6 Oxygen O 2 Carbon Dioxide CO 2 Water H 2 O Energy

11. Cell Respiration Let’s draw the chemical formula on the board!! Let’s draw the chemical formula on the board!! What are the reactants, What are the products? What are the reactants, What are the products? What type of energy transformations are going on? What type of energy transformations are going on?

12. It’s a cycle in plant cells, Jennnnay

13. The process of cellular respiration is taking place in your cells right now!! You are currently taking in oxygen and burning sugars within the mitochondria to release chemical energy. You are currently taking in oxygen and burning sugars within the mitochondria to release chemical energy. This process is also known as Aerobic Respiration. Why? This process is also known as Aerobic Respiration. Why? –Because Oxygen is present which allows your cells to burn glucose into energy much more efficiently. –I am sure you have heard of Aerobics.

14. What would happen if your cells were deprived of oxygen?? Would they still be able to burn glucose to make energy?? YES!! YES!! Fermentation Fermentation –When might this occur? –Long distance runners often create an anaerobic environment for their cells What does anaerobic mean?? What does anaerobic mean?? –No Oxygen present –Not a very energy efficient process and a bad side effect is produced: Lactic Acid Lactic Acid

15. A different example of fermentation Breweries rely on this process: Breweries rely on this process: –Yeast cells need energy to survive, so they will breakdown sugars in anaerobic conditions and a byproduct is alcohol. –How do you know CO 2 is produced?

16. Fermentation Anaerobic Anaerobic Animals produce lactic acid and CO2 Animals produce lactic acid and CO2 Plants produce ethyl alcohol and CO2 Plants produce ethyl alcohol and CO2 Less efficient…pgs 124-125 Less efficient…pgs 124-125 –Aerobic respiration yields at least 36 ATP –Anaeorobic nets a measly 2 ATP

17. Let’s fill in this chart with the molecules and then the energy transformations _________________________________ _____________________ _________________________________ _____________________

18. Why do leaves change colors?? Chlorophyll B Chlorophyll A Xanthophyll Carotene

19. These chromatograms show chlorophyll b at the bottom, followed by chlorophyll a, xanthophylls, and carotenes.