1. Harnessing the power of LIGHT to CREATE food!
Photosynthesis
Harnessing the power of LIGHT to CREATE food!

2. By the end of this unit, you will be able to…
Explain why plants are green.
Identify where photosynthesis takes place.
Identify the structures of a chloroplast.
Write the chemical equation of photosynthesis.
Explain how glucose is made.
Compare and contrast the light dependent and independent reactions

3. Essential Question:
What is the process of photosynthesis and where does it take place?
Learning Objective:
I can show how photosynthesis transforms light energy into stored chemical energy.

4. Let’s start this off with some MUSIC!

5. Photosynthesis- LIGHT
White light from the sun is a blend of many different wavelengths (colors) of light.
An object is a certain color because it RELFECTS a certain portion of the light and absorbs the rest.

6. A leaf is green because it reflects green light.

7. Photosynthesis- Producers
Producers are organisms that make their own energy. They do not eat.
Producers are autotrophs, meaning they make their own food.
Photosynthesis is a process that producers use to store light energy as chemical energy (usually in the form of sugars)

8. Chemical Equations
Chemical equations have reactants (things that chemically react) and products (that which is produced)
Reactants > Products
CAREFUL!
Products are always on the end of the arrow
Products < Reactants

9. Pancake Recipe (REACTANTS) (heat)
1 cup flour + 1 cup milk + 2 TBSP baking powder + 1 egg + 1 TSP salt
(REACTANTS)
(heat)
> 12 Pancakes
(PRODUCTS)

10. Photosynthesis Equation
light energy
6 CO2 + 6 H2O > C6H12O6 + 6 O2
How to read that:
Carbon dioxide + water + light YIELDS Glucose + oxygen
Reactants Products
absorbed by chlorophyll

11. Glucose provides the energy and carbon needed to make other plant materials like wax and cellulose.-
REMEMBER CARBOHYDRATES????

12. Where? Photosynthesis occurs in the Chloroplast
Stroma- fluid part of chloroplast (like cytoplasm)
Grana- stack of thylakoids, contains chlorophyll
Thylakoids- looks like stack of coins
Draw that! >

13. Here’s another picture of a chloroplast

14. And another…

15. Here’s what they look like, for real

16. What absorbs the light?
Chlorophyll- green pigment in plants that absorbs the energy from sun and converts it to chemical energy
Carotenoids- Yellow, orange & red pigments that absorb light energy and pass onto chlorophyll

17. Quiz Yo Self!!
Using the white boards, write your answer to the following questions.
USE YOUR NOTES!!

18. What is the light absorbing green pigment in chloroplasts called?
Carotenoids
Green
Chlorophyll
Water

19. What is the light absorbing green pigment in chloroplasts called?
Carotenoids
Green
Chlorophyll
Water

20. Light energy is converted to chemical energy through the process of….
Glycolysis
Photosynthesis
Cellular Respiration
Fermentation

21. Light energy is converted to chemical energy through the process of….
Glycolysis
Photosynthesis
Cellular Respiration
Fermentation

22. Plants appear green because…..
They absorb green wavelengths of light
They reflect green wavelengths of light
They absorb blue and yellow wavelengths, which makes green
It’s an optical illusion and we’re all seeing different colors.

23. Plants appear green because…..
They absorb green wavelengths of light
They reflect green wavelengths of light
They absorb blue and yellow wavelengths, which makes green
It’s an optical illusion and we’re all seeing different colors.

24. Which of the following is an example of an autotroph?
Dog
Cat
Elephant
Tree

25. Which of the following is an example of an autotroph?
Dog
Cat
Elephant
Tree

26. The TWO parts of a chemical equation are…
Reactants and Products
Oxygen and Carbon dioxide
Mitochondria and chloroplasts
Peanut butter and jelly

27. The TWO parts of a chemical equation are…
Reactants and Products
Oxygen and Carbon dioxide
Mitochondria and chloroplasts
Peanut butter and jelly

28. Write out the CORRECT chemical equation for photosynthesis

29. 6 CO2 + 6 H2O ------------> C6H12O6 + 6 O2
Check Yo Self…
6 CO2 + 6 H2O > C6H12O6 + 6 O2

30. In which organelle does photosynthesis take place?
Mitochondria
Golgi body
Nucleus
Chloroplast

31. In which organelle does photosynthesis take place?
Mitochondria
Golgi body
Nucleus
Chloroplast

32. Label the chloroplast!
Word Bank
Stroma
Grana
Thylakoid
Cell membrane

33. Label the chloroplast!
Stroma
Thylakoid
Grana
Cell Membrane

34. Pat yourself on the back!
Now you can….
Identify where photosynthesis takes place
Write the chemical equation for photosynthesis
Explain why plants are green!
Pat yourself on the back!

35. Exit Ticket
INDIVIDUALLY, Write the chemical equation for photosynthesis. Write a sentence with the word chlorophyll (our two stems)

36. Essential Question
What is the difference between the Light Reaction and Calvin Cycle during photosynthesis?
Objective:
I can explain how glucose is made.

37. Let’s Review!
Using the notecards at your table, rearrange them into the correct chemical equation for photosynthesis.

38. Does it look like this?
6 CO2 + 6 H2O > C6H12O6 + 6 O2

39. 2 Cycles
There are two cycles that work together to create glucose (C6H12O6)
Light Reactions (require light)
Calvin Cycle (doesn’t require light or dark)
Definition:
Photolysis- when a chemical (like water) is broken down by photons

40. But first! What the heck is ATP?
ATP= Adenosine Triphosphate
ATP is an ENERGY molecule. We have energy because we have ATP.
ATP= ENERGY!

41. Light Reaction- Needs Light
Occurs in the grana of chloroplasts
Adds a phosphate to ADP to become ATP
Splits water (H2O) to release O2 (oxygen) and H+ (hydrogen)
Sends H+ over to Calvin Cycle
That’s what we breathe!!

42. That pore is called a stomata
Remember Diffusion?
After the Light Reaction, oxygen (O2) diffuses out of the cell that we then breathe!
That pore is called a stomata

43. Calvin Cycle- Doesn’t need light!
Occurs in the stroma of chloroplasts
Takes in CO2 (Carbon Dioxide)
Uses the ATP (energy) and H+ from Light Reaction
Synthesizes (makes) GLUCOSE (C6H12O6)
This can happen day or night

45. Photosynthesis Project
Learning Objective: I can show how photosynthesis transforms light energy into stored chemical energy.
Habit of Mind: Curiosity
To demonstrate your mastery, of this learning objective, you may choose one of the following projects to complete in the next week. Each has its own guidelines and requirements. This will be an individual project so choose wisely.
Poster: Identify the parts of a flower and plant then create a poster with appropriate labels
Brochure: Research project about deforestation or global climate change
Create a song and video about photosynthesis
Create a model of a chloroplast with appropriate labels

46. Grit AngelaDuckworth.com/grit-scale
Write about a time when you had to persevere through challenges to accomplish something. How did you succeed? What did that feel like?
Skills
Goals
Friendships
School (FINALS??)