Photosynthesis is the process by which plants, algae, and cyanobacteria use sunlight, water and carbon dioxide to produce oxygen and energy in the form of sugars. Key parts of the process include chloroplasts, which contain chlorophyll and convert sunlight into chemical energy, and thylakoids, where photosynthesis takes place. The major reactants in photosynthesis are water and carbon dioxide, while the main products are oxygen and glucose or sugar. Photosynthesis is essential for plants and critical for life on Earth.

1. Overview of Photosynthesis
Week 2
Supplementary Science 10

2. Learning Objectives
• identify the photosynthesis equation.
• identify the parts of plant involve in photosynthesis.
• describe the process of photosynthesis
• explain the purpose of photosynthesis.

4. Is energy transformed during photosynthesis?
• Photosynthesis is the process in which light energy is converted to
chemical energy in the form of sugars.
Light
Energy
Chemical
Energy

5. Guess What?
P _ _ _ T _ P_ _ _ _ P _ _ _ K _ _ _
C _ _ N _ _ _ C _ _ _ _ A

6. Guess What?
PLANTS PHYTOPLANKTON
CYANOBACTERIA

7. Organisms that plays an important role in photosynthesis.
1. Plants - use sunlight, water, and carbon dioxide to create oxygen
and energy in the form of sugar.
2. Phytoplankton - have chlorophyll to capture sunlight, and they
use photosynthesis to turn it into chemical energy.
3. Cyanobacteria – use photosynthetic pigments, such as
carotenoids, phycobilin, and various forms of chlorophyll, which
absorb energy from light.

8. What are the parts of the Leaves?
Physical Parts Cellular Parts

10. Parts of the Chloroplast
• Chloroplast
The chloroplast converts sun light into food (sugar) for
the plant with the help of water and carbon dioxide.
• Granum
Special thylakoids stacked on top of each other. They
are connected to each other by separate thylakoids.
• Thylakoid
A special internal membrane system where the
process of photosynthesis takes place.

11. 2 (Two) types of reaction in photosynthesis.

12. What are the products and reactants of
photosynthesis?

14. 1.What will happen to the plants if there is no sunlight, water,
or carbon dioxide?
2.Are there plants that can grow in the dark?

15. Self - Check
1. What are the reactants of photosynthesis?
2. What are the products of photosynthesis?
3. Where does photosynthesis take place?
4. What parts of the plants that are involve in photosynthesis?

16. Bring the ff. materials:
1. Soil in a small pot (2 pots)
2. Pechay or cabbage seeds ( any seeds that are easy to germinate)
3. Masking tape and marker (label)