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BLOOMFIELD PUBLIC SCHOOLS CURRICULUM GUIDE UNIT V. Electricity Estimated Time Range 2-4 weeks Content Standard 9.2 ENDURING UNDERSTANDINGS The student will understand that: 1. The electrical force is a universal force that exists between any two charged objects. 2. Moving electrical charges produce magnetic forces and moving magnets can produce electrical force. 3. Electrical current can be transformed into light through the excitation of electrons SAMPLE ASSESSMENTS Build a circuit to demonstrate the principals of electric motors and electric generators, and include a model illustrating an energy transformation to drive the generator. (Calculate the power you generate and how much it would cost at typical $ rates.) Build circuits to create an electromagnet. Build a quiz game board. Students will generate ten questions and answers and use simple circuits to identify the correct answer. Take a survey of the electrical appliances in your bedroom and based on your calculations, predict your electric bill based on wattage, usage and estimated cost of electricity. How might you reduce your consumption of electricity by ten percent? ESSENTIAL QUESTIONS 1. What is the role of energy in our world? 2. How do science and technology affect the quality of our lives? LEARNING OBJECTIVES The student will be able to: 1. Calculate the voltage, current and resistance in a simple series circuit using Ohm’s Law. 2. Describe and explain electric current, voltage, and resistance (Ohm’s Law). 3. Explain factors that affect resistance. 4. Explain how voltage produces electric current. 5. Explain how electricity is used to produce heat and light in incandescent bulbs and heating elements. 6. Describe the relationship between current and magnetism. SUGGESTED RESOURCES Physical Science – Concepts in Action with Earth and Space Science Prentice Hall Wyession, Frank, Yancopoulos ISBN #: 0-13-069982-9 Chapter 20 & 21 Global Science – Energy, Resources, Environment Kendall, Hunt Publishing Company Christensen ISBN #: 0-7872-9010-6 Chapter 7 & 9 Activity Evaluating Electrical Safety – Prentice Hall p. 623 SUGGESTED CONNECTIONS