Grade 3 · Science · Lesson 20

Simple Electric Circuits

Electricity flows through a path called a circuit. A simple circuit has four key components: a battery (power source), wires (path), a switch (control), and a bulb (output). For electricity to flow, the circuit must be a complete, unbroken loop — a closed circuit.

What this lesson teaches

1Name the key components of a simple electric circuit
2Explain the role of each component in allowing current to flow
3Distinguish between an open circuit and a closed circuit

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