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8th Grade Science UNIT Five Title: Electricity Subject/Course: Science Topic: Physical Science Length: Two Weeks Grade: 8th UNIT GOALS AND EXPECTATIONS Designer: Heather Johns IMPORTANT CONCEPTS/UNDERSTANDINGS: ESSENTIAL QUESTIONS: BIG IDEAS: • What is a closed circuit? • Electricity and magnetism are two aspects of a • What is a parallel circuit? single electromagnetic force but each force has • What is an open circuit? its own definite properties. • What is a closed circuit? Concepts: • What are differences and similarities between open • Electricity and magnetism are two aspects of a and closed series and parallel circuits? single electromagnetic force. Moving electric • What is the line of force in magnetic fields? charges produce magnetic forces, and moving • How do variables affect the strength of an magnets produce electric forces. These effects electromagnet? help students to understand electric motors • What is the difference between electricity and and generators. magnetism? • Electricity in circuits can produce light, heat, sound, and magnetic effects. Electrical circuits require a complete loop through which an electrical current can pass. STUDENT LEARNING EXPECTATIONS: PS.7.8.1 - Construct open and closed electrical circuits -series circuits -parallel circuits PS.7.8.2 - Describe and diagram open and closed series and parallel circuits PS.7.8.3 - Compare and contrast open and closed series circuits and parallel circuits PS.6.8.2 - Conduct investigations demonstrating the field force (lines of force) in magnetic fields PS.6.8.3 - Design and conduct investigations applying variables affecting the strength of an electromagnet PS.6.8.4 - Analyze and compare the relationship between electricity and magnetism SPECIFIC DECLARATIVE KNOWLEDGE – What I know • • • • • • • • • Define series circuit Define parallel circuit Differentiate between open and closed circuits Identify circuits as closed or open Define field force Identify magnetic field Identify lines of force in magnetic fields Identify variables affecting strength of an electromagnet Determine the relationship between electricity and magnetism SPECIFIC PROCEDURAL KNOWLEDGE – What I need to do • • • • • • Construct open and closed circuits—series circuits, parallel circuits Describe and diagram open and closed series and parallel circuits Compare and contrast open and closed series circuits and parallel circuits Conduct investigations demonstrating the field force (lines of force) in magnetic fields Design and conduct investigations applying variables affecting the strength of an electromagnet Analyze and compare the relationship between electricity and magnetism UNIT ASSESSMENTS (Include tasks related to Dimensions 3 and 4 and Bloom’s Taxonomy) 1 • • • • • • Short Circuit Lab Venn Diagram Electromagnet Lab Let the force be with you Lab Electric Motor Lab Open Response Traditional Assessments: Unit 5 Test Unit Notebook grade (graded throughout unit) Parts of Circuit Quiz Other Evidence of Learning: Daily Notebook Entries Lines of Learning (LOL) ACTIVITIES AND LEARNING EXPERIENCES • • • • Short Circuit: Students will be given light bulbs, a battery and battery holder, alligator clips, wire, and a switch. The students will be asked to turn the light on. Once the students have accomplished this, they must then turn two lights on. Then they must turn one light on while the other light remains off. The students will diagram each time they build a model of the circuit, whether it works or not. Electromagnet: Students will be shown how to construct an electromagnet. Students will then design their own experiment testing the electromagnet. The students will be expected to change something about the electromagnet in order to pick up more paperclips (or material provided). The students will record their data and changes on a data table in their notebooks. Let the force be with you: With no more than three in a group, students will take a bar magnet placed between two pieces of paper and pour iron filings on the paper to demonstrate the lines of magnetic force. Venn Diagram: Students will create a Venn Diagram comparing and contrasting open and closed series and parallel circuits • Electric Motor: Students will be able to create their own motor using a battery, small magnet and copper wire. Resources My Documents SAMSC (South Arkansas Math and Science Center) My Documents My Documents My Documents Career Connections Based on what the students have learned about motors, generators and electricity, students will brainstorm all possible careers. 2