Name of Activity  Ohm’s Law and Series Circuits 

Author  STOMP 
Keywords  circuit, electricity, Ohm’s Law, voltage, resistance, current 
Subject  NonLEGO 
Grade Level  4, 5, 6, 7, 8, 9+ 
Time  1 Hour Total 
Brief Description  Students will build a simple circuit using previous knowledge about electricity. They will use Ohm’s Law to analyze the circuit. 
Lesson Objectives:   To introduce electricity, circuits, and electrical engineering.  To apply Ohm’s law to real circuits. 
Materials Needed:   24 Gauge AWG wire, cut to 8 inch lengths w/stripped ends. Give each student group 5 – 6 8 inch pieces.  9V battery with connector plate.  2 1Watt light bulbs with lamp bases.  2 Toggle switches.  Alligator clip. 
Preparation and Set Up:   Make a copy of the worksheet for each student.  Prepare a demo circuit.  Arrange students in groups of 2 – 3.
 Distribute materials. 
Necessary Background  Ohm’s Law describes the relationship between the voltage, current, and resistance of a circuit. This relationship is given in the relationship Voltage = Current x Resistance. Knowing this relationship, it is possible to find any of the three values as long as the other two are known.
Vocabulary: 
Procedure 

Extensions or Modifications:  Design on paper a circuit of your choice, using whatever size battery and resistors you want. Calculate the Voltage, Resistance and Current in your circuit. Your teacher will show you a circuit that she or she has built. Draw a circuit diagram representing it. 
Reference 1  http://sites.tufts.edu/stompactivitydatabase/files/formidable/o1.png 
Reference 2  http://sites.tufts.edu/stompactivitydatabase/files/formidable/o2.pdf 
Reference 3  http://sites.tufts.edu/stompactivitydatabase/files/formidable/o3.pdf 
Reference 4  http://sites.tufts.edu/stompactivitydatabase/files/formidable/o4.pdf 
Reference 5  http://sites.tufts.edu/stompactivitydatabase/files/formidable/o5.pdf 