The classroom lamp won't turn on! Read the clues and open all four locks to learn how electricity flows in a circuit to make light and heat.
Electricity is a kind of energy, but it can only flow around a closed path called a circuit. If there is a gap, the light goes out. Tap each clue, then open all four locks to fix the light!
Tap each clue to read it. You can open them again anytime.
Use the clues to open each lock.
You traced how electricity flows from the battery, through the wires, to the bulb and back. A closed circuit turns electrical energy into light and heat — and now you know its secret!