the basics of photosynthesis

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