1. Do Now #1. 4/18/18 When do you use energy
Do Now #1 4/18/18 When do you use energy? List all of the ways you have used energy today.

2. Do Now #2 4/19/18
What is the difference between ATP and ADP? What role do both play?
2) What are examples of forms of energy?
3) What are the 2 cell energy processes we will be studying?

3. Do Now #3. 4/20/18 1) Where does photosynthesis occur
Do Now #3 4/20/18 1) Where does photosynthesis occur? 2) Write the chemical equation for photosynthesis? 3) Where do light reactions take place?

4. Cell Energy

5. Without the ability to obtain and use energy, life would not exist.

6. Forms of Energy
Energy comes in many forms:
Light
Heat
Electricity
. . . Energy can also be stored in the bonds of chemical compounds.

7. Chemical Energy
The main compound cells use to store and release energy = ATP

8. Cell Energy Compounds:
1. ATP
= adenosine triphosphate
ATP is a high energy compound
2. ADP...
adenosine diphosphate
(1-less phosphate group
and less stored energy)

9. Energy RELEASED from ATP when one Phosphate group bond is BROKEN-- ADP less stored energy

10. The two cell energy processes we will discuss =
Photosynthesis
Cellular Respiration

11. Where do trees get their mass from? Veritasium Video
Video from:

12. Photosynthesis
CHAPTER 8

13. Why do leaves change colors in the fall?

14. Who can do this? …Plants and Algae
Photosynthesis
Definition: The conversion of light energy into chemical energy stored in organic compounds
Who can do this? …Plants and Algae

15. In other words, remember this:
Chemical Equation
In other words, remember this:
carbon dioxide + water + light energy = glucose + oxygen
As a chemical reaction it's like so:
6CO2 +6H2O  C6H12O6 + 6O2

16. Where does it happen? Within the CHLOROPLAST of a plant cell
Draw & label
in notes!

17. Location and Structure of Chloroplasts

18. 2 Major Groups of Reactions
How does it happen????
2 Major Groups of Reactions
A. Light Dependent
B. Calvin Cycle

19. Circle on the diagram you drew.
A. Light Reactions
Reaction occurs in the membrane of the thylakoid
Chloroplast
Circle on the diagram you drew.

20. 1. Photosynthesis begins with the absorption of light by pigments in the thylakoids and the splitting of water
Main pigments in plants = chlorophyll. It absorbs all colors of light, and reflects back green.
PIGMENTS

22. A. Light Reactions-con’t
2. Light excites e- that were released from water and are in the chlorophyll pigments (e- go from low energy to high energy)
3. e- travel to other molecules in membrane, losing energy along the way

23. This process is called
THE ELECTRON
TRANSPORT
CHAIN (ETC)

24. Final Step: 4. e- combine with H+ to make NADPH and … ATP ADP + phosphate + energy ATP NADPH and ATP will act as energy to fuel the Calvin Cycle………..

25. Needed: Light energy & H2O
Summary of
Light Reactions...
Needed: Light energy & H2O
Made: ATP, NADPH
Waste: Oxygen

26. B. Calvin Cycle (a.k.a. Dark Reaction) produces glucose
Occurs in stroma of chloroplast (circle on your diagram)
Uses ATP and H from light rxn.
ATP + H + CO2(from air) = glucose (carb)

27. Solution-
STROMA
THYLAKOID
C h l o r o p l a s t

28. The exchange of gases between the leaf and the atmosphere occurs through the STOMATA (pores on the underside of a leaf)

29. Summary
Light Reaction
*Makes ATP and NADPH
Calvin Cycle
*Makes glucose

30. Excited about photosynthesis yet????
Let’s sing!
Image from: Movie clip from: