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Build a Circuit and Test Conductors

Build a working circuit, then use it as a tester to sort materials into conductors and insulators.

Grade 7ExperimentScience OlympiadScienceEngineeringElectricityPhysicsEngineeringIntermediate45 to 60 min6 materialsAdult supervision required

What you'll learn

  • Build a complete series circuit and explain why it must be a loop
  • Classify materials as conductors or insulators from evidence
  • Explain how the length of a graphite lead changes the brightness of a bulb

Objective

Build a complete circuit, use it to test materials, and explain the results using the idea of electric current.

STEM concepts

Electric currentCircuitsConductors and insulatorsResistanceEnergy transfer
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Materials and safety
Step-by-step instructions
Prediction, test sheet and results
Why does it work, challenge and project report

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