SIMPLE ELECTRIC CIRCUITS

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SIMPLE ELECTRIC CIRCUITS

• Lesson 72
• Teacher M. Kane

• Subject Science
• Unit Ohms Law

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STANDARD ADDRESSED

• Pennsylvania 3-4-10 B,C
• Physical Science, Physics, and
• Chemistry

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ASSESSMENT TECHNIQUES

• Assessment/Evaluation
• 1. Students successfully navigate through the
  different types of solutions.
• 2. Students can explain how electricity works.
• 3. Students display in a poster the electrical
  process.
• 4. Students demonstrate their understanding of
  electrical circuits by successfully constructing
  and wiring a cardboard house of their own design

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ENDURING UNDERSTANDING

• 1. Perform experiments with more complex circuits
  under adult supervision.
• 2. Visit an electrical power plant and share the
  experience with classmates.
• 3. Write articles summarizing what has been
  learned.
• 4. Create pictures or diagrams of circuits using
  technological tools. Create a class slide show.
• 5. Encourage further reading about unanswered
  questions.

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IMPORTANT KNOWLEDGE

• OHMS LAW

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OBJECTIFS

• Electric Circuits   Children will investigate
  electricity and circuits. They will explore
  brightness of a light bulb, conductors,
  insulators, single circuit diagrams, switches,
  and solutions. The unit culminates with students
  constructing and wiring a cardboard house of
  their own design.
• Safety   Students will explain safety rules
  regarding the use of electricity and chemical
  solutions in their everyday lives.
• Media   Students will become more familiar with
  the World Wide Web as a tool for research.

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METHODS

• GROUP OF 3 STUDENTS
• PREPARATION
• LAB ACTIVITY
• LAB REPORT

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MATERIALS

• Electric wires
• Lamps
• Switch
• Different liquids (water, acid, juices, coffee,
  soda, baking soda)
• Stands
• 9 Volts batteries or DC source

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45 mn ASSIGNMENT

• Cooperative Group Work of Three.
• Discussion and Decisions.
• Data collection
• Analysis
• Synthesis
• Extrapolation
• Conclusion
• Presentation

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PROCEDURE

• Nature of Electricity
• What is it?
• Historic Misconception (Ben Franklin)
• Symbols
• Model of water flow in a river

                                                  
                                                  
                                               
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PROCEDURE

• Major Modification
• Instead of using a resistance in the circuit make
  it more meaningful by inserting a lamp (visual
  indicator) and a liquid (like water) naturally
  available in the real world!

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PROCEDURE

• Constructing a circuit with a DC source, a
  switch, and a lamp in series with a solution

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PROCEDURE

• Constructing a circuit with a DC source, a
  switch, and a lamp in series with a solution
• Visualization (qualitative) brightness of lamps

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PROCEDURE

• Constructing a circuit with a DC source, a
  switch, and a lamp in series with a solution
• Visualization (qualitative) brightness of lamps
• Closing Circuits with water main pipeline

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RESOURCES

• Philadelphia School District Science 9th Grade
  Core Curriculum.
• Montgomery County Public School Instructional
  Technology Support Team.