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Plant Power Lab

Lesson Plan

Photosynthesis Lesson Plan

Students will understand the process of photosynthesis by exploring how plants convert sunlight into chemical energy through diagrams, hands-on modeling, and a short quiz to demonstrate mastery.

This lesson builds foundational life-science knowledge, fosters scientific curiosity, and aligns with 4th-grade science standards, preparing students for future biology concepts.

Audience

4th Grade Students

Time

1 hour

Approach

Interactive, hands-on exploration and formative assessment

Materials

Plant Samples and Leaves, Photosynthesis Diagram Worksheet, Construction Paper, Markers and Crayons, Craft Supplies (pipe cleaners, popsicle sticks), Plant Energy Cycle Mini-Project Template, Sunlight Simulation Lamps (optional), and Photosynthesis Exit Quiz

Prep

Prepare Materials

15 minutes

Step 1

Introduction & Engage

10 minutes

  • Begin with a brief question: “Where do plants get their food?”
  • Show a leaf sample and ask students to observe color and texture
  • Introduce key vocabulary: photosynthesis, chlorophyll, glucose, carbon dioxide, oxygen
  • Explain lesson goals and activities

Step 2

Diagram Exploration

15 minutes

  • Distribute Photosynthesis Diagram Worksheet
  • Guide students through labeling parts: sunlight, water, carbon dioxide, chloroplasts, glucose, oxygen
  • Model the flow of energy on the board
  • Check for understanding with quick thumbs-up/thumbs-down prompts

Step 3

Mini-Project: Energy Cycle Model

20 minutes

  • Provide each group with Plant Energy Cycle Mini-Project Template and craft supplies
  • Instruct students to build a 3D model showing how sunlight, water, and CO₂ become glucose and O₂
  • Circulate to support groups, prompt explanations, and scaffold as needed
  • Use differentiated supports: word banks for ELL learners; step-by-step visuals for IEP students

Step 4

Group Presentations & Discussion

10 minutes

  • Each group briefly presents their model to the class (1–2 minutes each)
  • Ask peers to identify inputs (sunlight, water, CO₂) and outputs (glucose, O₂)
  • Use guiding questions: “Why is photosynthesis important for animals?”

Step 5

Exit Quiz

5 minutes

  • Hand out Photosynthesis Exit Quiz
  • Allow extra time or simplified wording for students with IEP/504 plans
  • Collect quizzes for assessment and provide immediate feedback where possible
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Activity

Photosynthesis Diagram Worksheet

Instructions:

  1. Label each part of the diagram below using the word bank.
  2. Answer the short-answer questions to show your understanding.

Part A: Label the Diagram

Use these terms: chloroplast, chlorophyll, carbon dioxide, water, glucose, oxygen

[Draw or paste a simple leaf/chloroplast diagram here]









  1. ___________ (green pigment that captures sunlight)
  2. ___________ (gas plants take in through their leaves)
  3. ___________ (liquid absorbed by plant roots)
  4. ___________ (tiny structures inside leaf cells where photosynthesis happens)
  5. ___________ (sugar produced by plants)
  6. ___________ (gas released by plants)

Part B: Short Answer

  1. In your own words, what is photosynthesis?





  2. Why do plants need sunlight to make food?





  3. How does photosynthesis help animals survive?










  4. Name two products that plants make during photosynthesis.





When finished, turn your worksheet in for review!

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Project Guide

Plant Energy Cycle Mini-Project Template

Objective: Build a 3D model showing how plants convert sunlight, water, and carbon dioxide into glucose and oxygen through photosynthesis.

Group Members: ______________________

Materials:

  • Construction paper
  • Pipe cleaners
  • Popsicle sticks
  • Markers and crayons
  • Glue or tape

Instructions:

  1. Plan Your Model (5 minutes)Sketch Your Model:











    • Decide which materials will represent sunlight, water, CO₂, chloroplast, glucose, and oxygen.
    • Sketch your model in the space below.
  2. Build Your Model (10 minutes)
    • Use craft supplies to create each part:
      • Sunlight: ____________________
      • Water: ____________________
      • Carbon Dioxide (CO₂): ____________________
      • Chloroplast (site of photosynthesis): ____________________
      • Glucose (sugar product): ____________________
      • Oxygen (O₂): ____________________
  3. Label Inputs and Outputs (5 minutes)
    • Attach labels to each part of your model.
    • Create a key or legend if helpful.
  4. Explain the Process (5 minutes)Process Explanation:











    • Write a brief description of how sunlight, water, and CO₂ become glucose and O₂ in your model.
  5. Reflection (5 minutes)Reflection:











    • Answer: Why is photosynthesis important for animals and humans?

Be Prepared to Present: Each group will have 1–2 minutes to share their model, identifying inputs, outputs, and explaining the overall process of photosynthesis.

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Quiz

Photosynthesis Exit Quiz

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