No Prep Plans: Conductors & Insulators – Conductivity Investigation

No Prep Plans: Conductors & Insulators – Conductivity Investigation
Year 7 Physics | Aligned with Cambridge Lower Secondary Science

Bring electricity to life with this engaging, hands-on investigation that helps students discover why some materials allow electric current to flow while others block it completely. In this inquiry-based physics activity, students build a simple test circuit, investigate a variety of classroom materials, classify conductors and insulators, and apply their findings to real-world electrical systems.

Students explore the role of free electrons, learn why metals are typically good conductors, discover why materials such as plastic and rubber are excellent insulators, and investigate why engineers combine both materials in electrical wiring. Through testing, data collection, analysis, and scientific explanation, students develop a deeper understanding of electrical conductivity and safety.
This project combines scientific investigation, engineering applications, and critical thinking while reinforcing key Cambridge Lower Secondary Physics concepts.
What's Included
• Teacher Directions Page (45–60 minute lesson)
• Student Research & Planning Worksheet
• Student Testing & Data Collection Worksheet
• Student Conductivity Investigation Report Worksheet
• Full-Color Versions
• Black-and-White Versions
Students Will Learn About
• Conductors
• Insulators
• Electrical Conductivity
• Free Electrons
• Electric Current
• Metals and Non-Metals
• Circuit Testing
• Electrical Wiring
• Copper Conductors
• Plastic Insulators
• Electrical Safety
• Real-World Electrical Applications
Skills Developed
• Scientific Inquiry
• Observation Skills
• Data Collection
• Data Analysis
• Experimental Design
• Classification Skills
• Critical Thinking
• Scientific Communication
• Engineering Connections
• Evidence-Based Reasoning
Perfect For
• Cambridge Lower Secondary Science
• Year 7 Physics
• Electricity Units
• STEM Activities
• Hands-On Science Labs
• Project-Based Learning
• Science Centers
• Homeschool Learning
• Extension Activities
• Review Lessons
• Sub Plans
Teacher-Friendly Features
• Print-and-go format
• Minimal preparation required
• Uses inexpensive classroom materials
• Flexible implementation options
• Encourages active investigation
• Supports scientific discussion
• Includes both color and black-and-white versions
• Easy to differentiate for diverse learners
• Reinforces science vocabulary and real-world applications
During the investigation, students test common materials such as paperclips, coins, aluminum foil, pencil lead (graphite), plastic rulers, rubber bands, and wooden sticks to determine whether they conduct electricity. Students record observations, analyze results, and explain why conductors and insulators are both essential for safe electrical systems.
By the end of the lesson, students will understand not only how electrical conductivity works, but also why electrical wires use copper on the inside and plastic on the outside—a practical engineering solution found in everyday life.
Important Disclaimer
This resource is an independent educational product created to support classroom instruction and is not affiliated with, endorsed by, or approved by Cambridge University Press & Assessment or Cambridge International Education. References to Cambridge Lower Secondary Science are provided solely to indicate curriculum alignment and instructional relevance. Teachers should use their professional judgment and their school's approved curriculum materials when implementing this resource.