Photosynthesis is the process by which plants convert light energy from the sun, carbon dioxide from the air, and water from the soil into glucose and oxygen. It occurs in two stages: in the light reactions, light energy, water, and carbon dioxide are used to produce ATP, NADPH, and oxygen; and in the Calvin cycle, ATP, NADPH, and carbon dioxide are used to produce glucose.

1. Photosynthesis
An Introduction & Overview

2. As always…
• Key concepts are underlined
• Vocab is in green

3. Objective
1. Write the overall equation for
photosynthesis in both symbols
and words
2. Identify the reactants and
products for the 2 stages of
photosynthesis

4. On your whiteboards
• What are some things plants
NEED in order to survive?

5. Draw
this

6. Photosynthesis
• Plants need 3 things to do
photosynthesis:
1. Water
1. Taken in through roots or
surroundings
2. Carbon dioxide (CO2)
1. Taken in from air or water
3. Light energy from the sun

7. Photosynthesis
• Photosynthesis is a process
plants use to convert the light
energy from the sun into
chemical energy that they can
use
• The chemical energy is a
molecule of sugar called
glucose
• Plants and animals use this for
food

8. Photosynthesis
• We can show the overall process of
photosynthesis in a chemical equation
• Water = H2O
• Carbon dioxide = CO2
• Light energy
• Glucose = C6H12O6
• Oxygen = O2

9. On your whiteboards
•What is the chemical symbol for carbon
dioxide?
•What is the chemical symbol for glucose?
•What is the chemical symbol for oxygen?

10. Equation
REACTANTS – what goes into a
chemical process
They react during photosynthesis
to make something new
Water +
Carbon
dioxide + Light energy
Write this part of the equation on your
whiteboard in SYMBOLS

11. Photosynthesis
equation
• PRODUCTS: what comes out of a chemical
process
• Glucose - C6H12O6
• Oxygen – O2
Water +
Carbon
dioxide + Light energy Glucose + Oxygen
Write the entire equation for photosynthesis on
your whiteboards using SYMBOLS

12. Quick Check with
Popsicle Sticks
• What is the chemical symbol for water?
• What is the chemical symbol for oxygen?
• What is the chemical symbol for carbon
dioxide?
• What is the chemical symbol for glucose?
• What are the reactants of photosynthesis?
• What are the products of photosynthesis?

13. Balance the equation
H2O + CO2 Light energy C6H12O6 + O266 6

14. On your whiteboards
• What type of energy goes
into a plant during
photosynthesis?
• How do plants store this
energy?

15. 2 stages of
photosynthesis
• Stage 1 – the Light
Reactions
 Reactants: Light and
water
 Products: oxygen
(O2), energy
molecules ATP and
NADPH
 Location: thylakoid
membranes inside
the chloroplast

16. 2 Stages of Photosynthesis
• Stage 2 – the Calvin
Cycle (or light-
independent reactions)
 Reactants: carbon
dioxide (CO2)
 Products: glucose,
ADP, NADP+
 Location: stroma
inside the chloroplast

18. Video Segment 1 – Plant
Cells
Words to write and listen for:
1. LEAVES
2. WATER
3. ROOTS
4. PHOTOSYNTHESIS

19. Now…LISTEN to the video
segment

20. Now…WRITE a 1 sentence
summary using those words

21. Video Segment 2 – A Sweet
Discovery
Words to write and listen
for:
Sun
Chloroplasts
Food
Sugar

22. Now…LISTEN to the video
segment

23. Now…WRITE a 1 sentence
summary using those words

24. Video Segment 3 – Jay’s
Journal
Words to write and listen
for:
Chlorophyll
Green
Yellow
Red

25. Now…LISTEN to the video
segment

26. Now…WRITE a 1-2 sentence
summary using those words

27. Video Segment 4 -
Photosynthesis
Words to write and listen for:
Thylakoids
Chlorophyll
Light
Calvin cycle
Glucose

28. Now…LISTEN to the video
segment

29. Now…WRITE a 1-2 sentence
summary using those words

30. Objective
1. Write the overall equation for
photosynthesis in both symbols
and words
2. Identify the reactants and
products for the 2 stages of
photosynthesis