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Bell Ringer 60sec Oct 22, 2013 Label the energy transformations to a Radiometer http://www.duke-energy.com/about-energy/generating-electricity/coal-fired-how.asp Chemical Thermal Mechanical Electrical Thermal Radiant PE KE KE KE KE KE Coal boiler Thermal convection turbine spins electricity conducts light shines Radiometer heats and spins the meter Steam Generator that boost electrons to conduct (rotating magnets) Label Energy Transformations to make the clock light up. Make an Energy transformation chart for the robot’s eyes. Read and answer questions on 17.1! Check #1-23 Target I can define types of static electricity. Bell Ringer Define and draw each type of atom. Stable (no charge) atom Positive Charged atom More + Protons Draw Negative Charged atom More – electrons Draw Agenda 1. Electrical Charge and force (17.1Holt Power Point) 2. Van de Graaff Generator- static charge demonstrations 3. Attract or repel water with a charge balloon. Diagram the Van de Graaff and explain why when you get close you get shocked even when you don’t touch it. Targets I can define static electricity. Agenda 1. Bell Ringer 1. Bell Ringer Answer: A neutral or stable atom has the same # of protons, neutrons and electrons, Van de Graaff Generator – generates + ionic charges (atoms that lost an electron so has more protons than electrons) They want to find an electron to complete their outer shell. In a quest to find a balanced “Entropy” and to complete the valence (outer) orbit it jumps to your extra (-) electrons There is an electron! NO MORE CHARGE! Jump 60 seconds think of 10 things your thankful for Bell Ringer Write the sentence below and complete the blanks then touch briefly the plasma ball. All Energy moves from Stored _______ PE to _____ PE and hot chases ____. Atoms try to take the least resistance path toward a balanced to a no charged state. I cant find my electron! Plasma Ball and Van de Graaff –demos 2. How does lightning strike? Read diagram how and watch a video on Discover Education Bell Ringer 60sec Bell Ringer Target: I can describe and predict the electrostatic forces between objects using the Coulombs Law formula Agenda 1. Read about Brains axons and electrical connections – 2 articles and record answers in CB. 2. Test different solution to see which conducts electricity better. 2. Chapter 17.2 What is current and how does if flow? Label pictures on target sheet and add to your notes from last night!!!! 4. Virtual Lab- electricity moving electron in a circuit. Examples:Wire, water, metal, chemicals, you, air R-(hum tingles lips to remind you the resistance is friction and slows the flow cost dough)) (Ch17.3) V=IR PE. Series verses parallel circuits Parellel cicuit have their own supply of PE so both Series share lights work independently and shine bright. 1st bulb gets all it wants and the 2nd could be dimmer since it gets left over PE Very Important People have Power ! Hand motions. VI=P Watts up with the Electric Bill? Kw/hour used x co$t for 1 kw/h = your bill Bell Ringer 60sec Oct. 24, 25 Target: I can design an experiment to give evidence that an electrical current makes a magnetic field. Agenda: 1. Build an electromagnet- contest Who can pick up the most paper clips? 2. Bring in stuff to build your own EM “thingy” Bell Ringer 60sec Oct. 28 Review for test: Electricity and Magnetism Relationships : Add to your copy with me on the overhead as the story unfolds… Atom – has 3 Protons , 3 Neutrons surrounded by it’s strong nuclear force electrons are held in orbit toward the Protons by the Electromagnetic force! Gravity like cupid is constantly forcing all masses toward one another Help, they call me a + ion but some atom took my outer shell’s electron! “Electrical Force Field activated” Force to protect my electrons. Repel atoms like me, looking for electrons. Thanks, I’m all charged with extra negative electrons now! Static Attraction 1.How is Static electricity formed?____________________________________________________________ _______________________________________________________ 2.Why is a battery a source of energy? It does not supply the charge instead ___________________________________________________________ 3.Which battery is Best to buy and why?_______________________ 4.How are series and parallel circuits different?______________ ____________________________________________________________ Draw a schematic diagram a series circuit: Spinning magnets that generate electricity by creating an alternating force field that produce moving electrons along a conductor it is called a Generator. Transforms mechanical energy into ___________ __________. 5.Where did the generator get it’s Parallel circuit Coiled wire with Amps can induce a magnetic force field (lines the metal’s atoms into a North and South pole); the coil is attach to a shaft and does work this is an Electrical Motor Converts electrical energy into _____________ _______. What source of energy be used? energy to rotate?_________ 6. Diagram how a generator produces an electrical current: __________ or_____ Diagram how electrical current can produce a magnetic field: 7. What do Generators and electrical motors have in common? _____________________________________________________________ 8. Who discovered that a coiled wire with electricity would induce a magnet and that changing magnetic fields across wire perpendicularly can produce electricity? _____________ ______________ The Laws of conservation are all about transform/recycle/reuse. 9. Why do think our universe conserves matter, energy and momentum?______________________________________________ 10. How do we get charge for our electrical uses? Formula: Units: Process: Just remember: 1. Electricity and magnetism are two aspects of a single “electromagnetic force” (look back at Atom) 2. Moving electrical charges produce magnetic forces or “fields” and moving magnets produce electric forces or “fields” 3. Electrical force is universal opposites attract & like charges repel but gravity is always attracting the masses Mechanically Electrically Work =force x distance = Newton Meter = ____joules Ohms Law: Volts = IR Power = work/time = w/s = _____watts Volts= Amps Resistance ion current inter friction Power = volts Ampere push ions in a current P= V I # Kilowatt/hours x cost of electricity /kwh = electric bill you use a month 2. Present EM toy things 3. Electromagnetic Exam (after lunch) Bell Ringer 60sec Oct. 30 Bell Ringer – diagram the thermal windmills electromagnetic fields hitting perpendicular (90degree) to the permanent magnets fields causing them to force the fan to move. Hot chase cold! Thermal conduction caused the atoms to increase in KE. Agenda: 1. Several more EM demos 2. Electroplating copper off a penny on to a dime 3. Video of electromagnets, Earth’s changing magnetic poles , how a TV works by transfers of EMR’s and electrical conduction to our TV (Discovery edu) 4. Got EM Test back 5. New Wave Targets and Re-Test practices Take 60 sec Breath -take deep breaths!!!! Bell Ringer- Prediction Look at a full water bottle with nails in it, of what happen when the nail is removed? EM Target-1 ,2 and 3 Agenda: 1. Record HW: research Electromagnets and reach chapter 18 2. Power Point on 17.2 Circuits and PE flow of current 3. Virtual lab circuits and calculation of power and resistance. Electrolysis and conduction in solutions (like your brain). Demo Lite up a florescent bulb with a Van de Graaff Fenerator! Fun and Shocking HOMEWORK! Write down! Bring in material to make Electromagnets do a task! Take notes onCh18! Friday Oct. 25 Bell ringer Copy at least 5 things from the list shown; they are uses of permanent Magnet in our daily lives. I will be checking ch18 & items brought in for today’s EM lab Agenda: 1. Permanent magnets verses electromagnets 2. Read how to build a good electromagnet and motor in Chapter 10 of CPO book. 3. Build Electromagnets- see samples you can make: door bell, dancing doll and rotating megaton. Celebration !!! M&M cookie brownie Highest class GPA and Great attendance for the 1st 9 weeks and Mastery of Targets (see list) Monday Static Man review Share electromagnets