Name______________________________

Period_____

4.2 Guided Reading

Photosynthesis

As you carefully read through the text, answer the following questions as completely as possible!

Introduction

1. How does a plant get the food it needs to survive? Explain.

2. Explain how the process of photosynthesis is “central to sustaining life on Earth.”

3. During photosynthesis, __________________________________ and water combine, using the suns’ energy to produce ________________________ and oxygen.

The Process of Photosynthesis

4. Photosynthesis takes place in the ______________________________.

5. Describe the two different parts of the chloroplasts.

6. Draw and label a simple diagram of a chloroplast.

The Reactants

7. What is a reactant?

8. What are the reactants of photosynthesis?

9. What is chlorophyll?

10. What special roles do the roots, veins, and leaves of a plant play in photosynthesis? Explain.

11. What are stomata?

The Products

12. What is a product?

13. The products of photosynthesis are ______________________ and ___________________.

14. What is glucose? What is it used for?

15. Why is it so important that plants release oxygen?

The Chemical Reaction

16. The overall chemical reaction for photosynthesis is: _____ molecules of carbon dioxide (CO2) + _____ molecules of water (H2O) + solar energy produces _____ molecule of glucose (C6H12O6) and _____ molecules of oxygen (O2).

17. Write the entire chemical equation for photosynthesis.

18. What is needed to start photosynthesis?

19. The initial steps of photosynthesis are called the __________________ reactions as they occur only in the presence of light. During the light reactions, _______________ is used and __________________ is released. The energy from sunlight is converted into a small amount of ________________ and an energy carrier called _________________.

20. ATP, NADPH, and carbon dioxide (CO2) are used to make __________________ through a process called the __________________ cycle.