How Plants Make Their Organic Molecule Worksheet

How Plants Make Their Organic Molecules: A Comprehensive Worksheet

This worksheet explores the fascinating process of photosynthesis, where plants create their own organic molecules using sunlight, water, and carbon dioxide. Understanding this process is key to understanding the foundation of most life on Earth. Let's delve in!

Section 1: Photosynthesis Basics

1. What is photosynthesis? Define photosynthesis in your own words. Include the key reactants and products.

2. Where does photosynthesis take place within a plant cell? Be specific and describe the structure of this organelle.

3. What is chlorophyll? Explain its role in photosynthesis and why plants appear green.

Section 2: The Two Stages of Photosynthesis

1. The Light-Dependent Reactions:

• a. Where do these reactions occur?
• b. What is the primary role of sunlight in this stage?
• c. What are the key products of the light-dependent reactions? Explain their importance in the next stage.

2. The Light-Independent Reactions (Calvin Cycle):

• a. Where do these reactions occur?
• b. What is the role of carbon dioxide in this stage?
• c. What is the final product of the Calvin Cycle? Why is this product so crucial for plant growth and survival?
• d. Explain the role of ATP and NADPH in the Calvin Cycle.

Section 3: Factors Affecting Photosynthesis

1. Light Intensity: How does changing light intensity affect the rate of photosynthesis? Explain your reasoning.

2. Carbon Dioxide Concentration: Explain the relationship between carbon dioxide levels and the rate of photosynthesis.

3. Temperature: Discuss the impact of temperature on the rate of photosynthesis. Why is there an optimal temperature range?

4. Water Availability: How does water scarcity affect the process of photosynthesis?

Section 4: The Importance of Photosynthesis

1. Explain the importance of photosynthesis to the entire ecosystem. Think about the role of plants as producers and the flow of energy through the food web.

2. How does photosynthesis contribute to the regulation of atmospheric gases? Discuss its impact on oxygen and carbon dioxide levels.

Section 5: Critical Thinking

1. Suppose a plant is grown in a dark environment. What would happen to its growth and why?

2. Imagine a scenario where the Earth's atmosphere had significantly lower levels of carbon dioxide. How would this affect plant life and the wider ecosystem?

3. Research and briefly describe a plant adaptation that enhances its photosynthetic efficiency.

This worksheet provides a framework for understanding the complex process of photosynthesis. By completing this, you'll gain a deeper appreciation of how plants create their own food, sustaining life on Earth. Remember to consult your textbook and other reliable resources to aid your learning. Good luck!