Begin the lesson by introducing the concept of wedges as simple machines. Explain how they transform the direction of force, often converting a vertical force into a horizontal one.
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Wedges
Learning Objectives
- Understand the function of a wedge as a simple machine that transforms applied force.
- Identify real-world examples of wedges and describe how they apply force in various applications.
- Explain how wedges are used in cutting and splitting materials by concentrating force on a narrow edge.
- Explore the role of wedges in construction and industrial settings for splitting and securing materials.
- Analyze the use of wedges in everyday tools and their practical applications in different scenarios.
Introduction and Hook
Engage students with real-world examples of wedges, such as axes, knives, and chisels, to illustrate their practical applications.
Direct Instruction
Explain the mechanics of wedges using the example of an axe splitting wood. Discuss how the wedge shape allows it to exert a spreading effect.
Introduce the video 'Simple Machines – Wedges' to visually demonstrate how wedges function in various applications.
Guided Exploration
Facilitate a discussion on the role of wedges in construction and industrial settings, such as splitting stone or securing objects.
Explore the use of wedges in everyday tools like scissors and doorstops, encouraging students to identify other examples in their environment.
Hands-On Activity
Conduct a hands-on activity where students use a wedge to split a soft material, such as clay, to observe how force is concentrated at the edge.
Provide the 'Investigating Wedges' assessment to reinforce understanding through definition, examples, and diagram activities.
Independent Practice
Assign students to find and document wedges in their homes or community, describing how each wedge functions and its purpose.
Check for Understanding
Use the 'Simple Machines' assessment to evaluate students' understanding of wedges and other simple machines through labeling and diagram exercises.
Review and Reflection
Review the key concepts of wedges as simple machines, emphasizing their role in transforming force and their applications in various tools.
Encourage students to reflect on how understanding wedges can help them in practical problem-solving scenarios.
Assessment and Extension
Administer the 'Review – Work and Simple Machines' assessment to gauge comprehensive understanding of wedges and other simple machines.
Encourage students to take the unit quiz to test their knowledge on wedges and other simple machines.
Try the Quiz
