Middle School Physical Science Teacher Guide


Features 23 core lab activities that cover the fundamental concepts of Force & Motion, Energy Transfer, Electricity & Circuits, Fluids and more.

Voltage Time

Lab Summary

Use a voltage sensor to measure the energy conversions that take place as the battery supplying energy for a miniature motor becomes exhausted.


In this activity, students build a miniature motor and investigate the energy conversions that take place as the battery supplying energy for the motor becomes exhausted. Students investigate voltage while:

  • Observing that electrical circuits provide a means of transferring electrical energy and converting that energy to heat, light, sound, mechanical energy or chemical changes
  • Understanding that energy is a property of many substances and is associated with heat, light, electricity, mechanical motion, and the nature of a chemical
  • Making explanations and predictions from evidence and drawing logical conclusions
  • Identifying variables that can affect the outcome of an experiment. In addition they will learn to identify other variables in an experimental design that must be controlled in order to isolate the effect of one variable
  • Gaining skills and confidence in using a scientific measurement tool, the voltage sensor, as well as the graphing capacity of a computer to represent and analyze data


Students gain experience conducting the following procedures:

  • Setting up the equipment and work space to construct a simple motor to incorporate into a circuit and measure voltage of this circuit
  • Building a simple motor
  • Measuring the change in voltage of a battery as it is used in a circuit until it runs down
  • Using math and graphing skills to interpret and analyze the data obtained

Your Bundle Options:

Option 1:

Middle School Physical Science Bundle


Equipment bundle for teaching 23 Middle School Physical Science Teacher Guide labs.

Option 2:

Middle School Science Standard Sensor Bundle


This bundle contains the probeware needed to perform all 49 lab activities in the Middle School Science through Inquiry lab manual.

Interface Required

This experiment may require software and an interface for data collection.