Science worksheet for Stage 4 students focusing on electric circuits, comparing open and closed circuits and explaining the role of plastic-covered plugs.

Science worksheet for Stage 4 students showing two diagrams of electric circuits—one open and one closed—with a light bulb, battery, and switch. The closed circuit shows the bulb lit, while the open circuit shows it unlit. Questions ask about the effects of turning the switch on and why electricity cannot flow in an open circuit. A plastic-covered plug is shown in a photo.