### Lesson Plan: Energy Sources - Windmill
**Subject:** Basic Technology
**Grade Level:** Junior Secondary 3
**Duration:** 60 minutes
**Topic:** Energy Sources - Windmill
#### Objectives:
By the end of the lesson, students will be able to:
1. Define wind energy and explain how a windmill works.
2. Identify the various components of a windmill.
3. Understand the advantages and disadvantages of using wind energy.
4. Create a simple model of a windmill using basic materials.
#### Materials Needed:
- Chart paper and markers
- PowerPoint presentation
- Model of a windmill or images/videos
- Craft materials (cardboard, scissors, glue, straws, paper clips)
- Worksheets and handouts
#### Lesson Structure:
**Introduction (10 minutes):**
1. **Greeting and Brief Overview:**
- Welcome students and introduce today's topic.
- Briefly discuss what they know about energy and different energy sources.
2. **Icebreaker:**
- Ask students if they have ever seen a windmill or know what it's used for.
- Show a short video or images of windmills in action.
**Teaching (20 minutes):**
1. **Explanation:**
- Define wind energy: Wind energy is the process by which wind is used to generate electricity.
- Explain how windmills work: Wind turns the blades, which spin a shaft connected to a generator that produces electricity.
2. **Components of a Windmill:**
- Introduce the main parts of a windmill: blades, rotor, shaft, generator, tower.
- Use diagrams or a model to show these components.
3. **Advantages and Disadvantages:**
- Discuss the benefits of wind energy (renewable, clean, cost-effective in the long run).
- Discuss the limitations (intermittent, noise, impact on wildlife).
**Activity (20 minutes):**
1. **Hands-On Windmill Model:**
- Divide students into small groups.
- Provide each group with materials to create a simple windmill model.
- Give step-by-step instructions:
1. Cut out blades from cardboard.
2. Attach the blades to a straw (acting as the rotor).
3. Use a paperclip to connect the rotor to a small piece of cardboard (representing the generator and tower base).
2. **Testing and Observation:**
- Allow students to blow on their windmills to see how movement is generated.
- Discuss what they observe about the motion and efficiency of their models.
**Assessment (5 minutes):**
1. **Questions and Review:**
- Ask a few questions to review key concepts (e.g., "What are the components of a windmill?", "What are the advantages of wind energy?").
2. **Worksheet Completion:**
- Distribute worksheets containing multiple-choice and short-answer questions about windmills and wind energy.
**Conclusion (5 minutes):**
1. **Summary:**
- Recap the main points discussed in the lesson.
2. **Homework Assignment:**
- Assign students to write a short paragraph on how windmills can impact their local community.
- Encourage students to research more about wind energy and other renewable energy sources.
**Additional Notes:**
- Ensure all students are actively participating and get the necessary support if they have difficulty with the model-building activity.
- Use multimedia resources to make the lesson more engaging and comprehensible.
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This lesson plan aims to provide a comprehensive and engaging approach to teaching Junior Secondary 3 students about wind energy and windmills, combining theoretical knowledge with practical activities.