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How Plants Make Their Organic Molecules: A Worksheet
Introduction: Plants are remarkable organisms capable of producing their own food through a process called photosynthesis. This process uses sunlight, water, and carbon dioxide to create glucose (a sugar) and oxygen. This worksheet will explore the details of this vital process.
Part 1: Understanding Photosynthesis
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What is Photosynthesis? Define photosynthesis in your own words.
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What are the reactants (inputs) of photosynthesis? List them and briefly explain their role.
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What are the products (outputs) of photosynthesis? List them and briefly explain their role.
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Where in the plant does photosynthesis primarily occur? Be specific.
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What is chlorophyll, and what is its role in photosynthesis?
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Draw a simple diagram illustrating the process of photosynthesis. Include labels for the reactants, products, and the location where it occurs.
Part 2: The Two Stages of Photosynthesis
Photosynthesis occurs in two main stages: the light-dependent reactions and the light-independent reactions (also known as the Calvin cycle).
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Light-Dependent Reactions: Briefly describe what happens during the light-dependent reactions. What are the key products of this stage?
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Light-Independent Reactions (Calvin Cycle): Briefly describe what happens during the light-independent reactions. What is the key product of this stage?
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How are the light-dependent and light-independent reactions connected? Explain the flow of energy and molecules between the two stages.
Part 3: Factors Affecting Photosynthesis
Several environmental factors can influence the rate of photosynthesis.
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Light Intensity: Explain how light intensity affects the rate of photosynthesis.
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Carbon Dioxide Concentration: Explain how carbon dioxide concentration affects the rate of photosynthesis.
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Temperature: Explain how temperature affects the rate of photosynthesis.
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Water Availability: Explain how water availability affects the rate of photosynthesis.
Part 4: The Importance of Photosynthesis
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Why is photosynthesis important for plants?
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Why is photosynthesis important for animals (including humans)?
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How does photosynthesis contribute to the Earth's atmosphere?
Answer Key (For Teacher Use): (You would add the answers here)
This worksheet can be adapted for different grade levels by adjusting the complexity of the questions and the level of detail required in the answers. Remember to add an answer key for your own use. You can then easily copy and paste this into a word processor and save it as a PDF.
