Grade: High School - 8

PI.8.8
Apply conservation of electric charge (i.e. Kirchhoff’s junction rule) to the comparison of electric current in various segments of an electrical circuit with a single battery and resistors in series and in, at most, one parallel branch and predict how those values would change if configurations of the circuit are changed.

I Can Statements Academic Vocabulary
I can apply conservation of electric charge (i.e. Kirchhoff’s junction rule) quantitatively compare electric current in various segments of an electrical circuit with a single battery and resistors in series.

I can apply conservation of electric charge (i.e. Kirchhoff’s junction rule) to quantitatively compare electric current in various segments of an electrical circuit with a single battery and resistors in parallel.

I can predict how the values current or voltage for individual devices would quantitatively change if the configuration of the circuit is changed by adding or removing a device.

Conservation of electric charge
Current
Circuit
Battery
Resistor
Series
Parallel

Cross Cutting Concepts
Scale, Proportion, and Quantity
*Algebraic thinking is used to examine scientific data and predict the effect of a change in one variable on another (e.g., linear growth vs. exponential growth).

Structure and Function
*The functions and properties of natural and designed objects and systems can be inferred from their overall structure, the way their components are shaped and used, and the molecular substructures of its various materials.

Science and Engineering Process Standards
SEPS 2: Developing and Using Models

SEPS 5: Using Mathematics and Computational Thinking

Looking Back Looking Ahead
Apply conservation of energy concepts to the design of an experiment that will demonstrate the validity of Kirchhoff’s loop rule (∑ΔV = 0) in a circuit with only a battery and resistors either in series or in, at most, one pair of parallel branches. (PI.8.7)

Make observations to provide evidence that energy can be transferred from place to place by sound, light, heat, and electric currents. (4.PS.5)

Use a description or schematic diagram of an electrical circuit to calculate unknown values of current, voltage, or resistance in various components or branches of the circuit according to Ohm’s Law, Kirchhoff’s junction rule, and Kirchhoff’s loop rule. (PI.8.9)