Understanding Photosynthesis: A Scientific Explanation
English
Grade 8
10 questions
~20 mins
1 views0 downloads
About This Worksheet
A worksheet focused on analyzing a scientific explanation passage about photosynthesis, designed to develop reading comprehension and annotation skills for Grade 8 students.
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Understanding Photosynthesis: A Scientific Explanation
Subject: EnglishGrade: Grade 8
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Untitled Worksheet
Grade Grade 8
A
Analysis of Scientific Explanation
Photosynthesis is the fundamental process by which green plants, algae, and certain bacteria convert light energy into chemical energy stored in glucose molecules. This intricate process occurs primarily within the chloroplasts, specialized organelles rich in chlorophyll. During photosynthesis, light energy excites electrons within the chlorophyll molecules, initiating a cascade of reactions known as the light-dependent reactions. These reactions produce energy-rich molecules such as ATP and NADPH, which are subsequently utilized in the Calvin cycle—a series of enzyme-assisted steps—where carbon dioxide is fixed into glucose. This process not only sustains the organism itself but also forms the basis of the food chain, supporting virtually all terrestrial and aquatic life forms. Understanding photosynthesis is crucial for comprehending ecological balance and the impact of environmental changes on plant life and the broader biosphere.
1.
Summarize the main purpose of photosynthesis as described in the passage.
[2 marks]2.
Identify the organelle where photosynthesis occurs.
[2 marks]3.
What are the two main stages of photosynthesis mentioned in the passage?
[2 marks]4.
Explain the role of chlorophyll in photosynthesis.
[3 marks]5.
Describe the significance of photosynthesis for the broader ecosystem.
[4 marks]6.
Identify and explain one scientific technique used in the passage to clarify the process.
[3 marks]7.
What is the significance of understanding photosynthesis in environmental science?
[2 marks]8.
Analyze how the passage constructs a scientific explanation. Identify at least one technique used.
[4 marks]9.
Based on the passage, what might be a consequence of disruption in the process of photosynthesis?
[2 marks]10.
Design a brief experiment to demonstrate the role of light in photosynthesis. Include a checklist of materials and steps.
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet