Young scholars participate in a hands-on activity to explore the relationship between the number of batteries in a series circuit and its voltage. Students identify the relationship between two variables and plot points on a graph.

Fourth graders study current electricity while constructing a simple electric circuit. They build a galvanic cell to examine the concepts of voltage, current and resistance.

Students explain the meaning of Ohm's Law, and plot a graph of voltage versus current, by explaining how the slope is the resistance of the circuit.