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Presents: Electricity & Magnetism Lessons Teacher Training 4th Grade Strand 5: Physical Science Standards Concept 3: Energy and Magnetism 5/22/2017 1 Teacher Training Overview Review Training Objectives & State Standards Magnetism basics & activities Electricity basics & activities 5/22/2017 2 1st Magnetism Activity “Magnetic Characteristics” 5/22/2017 3 What is Magnetism? Any material that attracts iron, steel, cobalt and nickel Can be permanent or temporary 5/22/2017 4 Magnetism Basics Only Certain Types of Materials Exhibit Magnetism N S Magnets can be made in a variety of shapes, but all magnets have 2 poles •Opposite poles attract •Like poles repel All magnets have lines of force extending from one pole to the other in the 3 dimensional space around them 5/22/2017 5 Magnetic Lines of Flux Magnetic Field Magnetic lines do not cross each other. The lines go from North to South on the magnet. 5/22/2017 N magnet S 6 Magnets Attracting Each Other N N S S Pulling 5/22/2017 7 Magnets Opposing Each Other N S N S Pushing Apart 5/22/2017 8 2nd Magnetism Activity Magnetic Lines of Flux 5/22/2017 9 What are the characteristics? North and south poles “di”-poles Break the magnet in half and you will have two separate magnets 3 dimensional field of attraction Transfer magnetic properties 5/22/2017 10 Where does it come from? Nature Man-made materials from: Ceramic Alnico (aluminum, nickel, & cobalt) Flexible rubber-like material Created using current (electricity) 5/22/2017 11 3rd Magnetic Activity Paperclip Pick-up 5/22/2017 12 Uses for Magnets in Everyday Life Cars Power locks Homes Door bells Microwaves TV’s Refrigerators Speakers Electricity Schools Whiteboards 5/22/2017 13 Magnetism Activities “Magnetic Characteristics” Lines of Flux Activity “Paper Clip Pick Up” Summarize findings & Review class worksheets 5/22/2017 14 Electricity Lesson Plan Review AZ state standards the lesson plan covers Review the student objectives covered in the lesson plan 5/22/2017 15 Safety Note Always be careful around electricity. Make sure an adult is present during experiments and demonstrations using electricity. Use only low voltage for demonstrations (6 volts dc or less) Take care to prevent shorts on batteries Never allow the positive and negative terminals to touch the same metal object (short) Use plastic covers on batteries when not in use Never use electricity from a wall outlet in any of these classroom demonstration. Use the batteries and genecons provided. 5/22/2017 16 Electricity Basics Electricity is….. • • • • The flow of electrons The energy sent out by batteries and generators (current electricity) The shock you can get from rubbing your feet on the carpet (static electricity) A bolt of lightning! (static electricity) 5/22/2017 17 All Matter is Made up of Atoms MATTER (water, diamond) ELEMENTS O H (oxygen, carbon) H ATOMS (particles) 5/22/2017 18 Atoms What is an Atom? The smallest component in all things Made up of three smaller particles Protons (+) Neutrons (no charge) Electrons (-) Strive for stability Charged atom = ion 5/22/2017 19 Opposites Attract ++ Attraction _ _ Particles with opposite charges attract each other. 5/22/2017 20 Charged Atom (Ion) +++ ++ ---- Stable Atom Positive Ion Negative Ion Stable atoms have equal protons and electron Stable atoms have no charge Free electrons will seek positively charged ions to create stability 5/22/2017 21 1st Electricity Activity “Opposites Attract” 5/22/2017 22 Electricity & Ben Franklin Benjamin Franklin (1706-1790) 1740’s – Proposed the notion of positive and negative charges maintain a balance except when influenced by some means. 1752 – Famous kite experiments identify lightning as a form of electrical discharge. 5/22/2017 23 Static Electricity The imbalance of positive and negative charges Example: a build up of negative charges in a storm cloud will travel to the ground in the form of lightening 5/22/2017 24 2nd Electricity Activity “Balloons and Electrons” 5/22/2017 25 Static Electricity Start with a doorknob – no charge Walk along carpet: strip electrons from carpet that collect in your body… You become negatively charged Approach the doorknob and the positive charges move toward you. Negative charges move away. 5/22/2017 26 Static Electricity When close enough, the electrons will jump toward the positive doorknob and ZAP! You’ve been shocked by static electricity. 5/22/2017 27 Static Electricity When close enough, the electrons will jump toward the positive doorknob and ZAP! You’ve been shocked by static electricity. Now you and the doorknob have the same charge. 5/22/2017 28 Current Electricity Electric current is the movement of free electrons from atom to atom To start the free electrons moving an electromotive force is needed. Generator Batteries 5/22/2017 29 3rd Electricity Activity Demonstration of Electromotive Force/ Current Electricity 5/22/2017 30 Electricity Activities “Balloons and Electrons” “Flow of Electrons” Demonstration of Electromotive Force Summarize Results & Review Class Worksheets 5/22/2017 31 References www.srpnet.com www.ieee.org www.coolmagnetman.com/magreview.htm www.en.wikipedia.org/wiki/Magnets www.creativekidsathome.com/science/magnetexp.html www.howstuffworks.com www.eia.doe.gov/kids/glossary 5/22/2017 32