Jeff Davis Elementary School Fifth Grade Teachers

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Jeff Davis Elementary School Fifth Grade Teachers Slide 2 GPS Standards S5P3.A- Investigate static electricity. S5P3.B- Determine the necessary components for completing an electric circuit. S5P3.C- Investigate common materials to determine if they are insulators or conductors of electricity. S5P3.D- Compare a bar magnet to an electromagnet. Slide 3 CRCT Descriptors Describe static electricity. Determine the necessary components for completing an electric circuit. Classify common materials as insulators or conductors of electricity. Compare a bar magnet to an electromagnet. Slide 4 Unit Essential Questions What is static electricity? What is electric current? What is a magnet? How do electromagnets work? BrainPop! Ben Franklin Slide 5 Animated Hero: Ben FranklinThe Inventor Slide 6 Lesson 1: What is Static Electricity? EQ: What is static electricity? Vocabulary: static electricity, electric charges, protons, electrons, attract (attraction), and repel (repulsion) Slide 7 static electricity Static electricity Static electricity is a buildup of electric charge on an object. It can jump from one object to another. Slide 8 electric charges Electric charges Electric charges are tiny particles that carry units of electricity. There are two kinds of electric charges, positive(+) and negative(-). Slide 9 protons Protons Protons are positively charged particles located inside the nucleus of an atom. Slide 10 electrons Electrons Electrons are negatively charged particles circulating outside of the nucleus. Slide 11 attract (attraction) attract Unlike charges attract one another, meaning they pull toward one another. Slide 12 repel (repulsion) repel Like charges repel one another, meaning they push each other away. Slide 13 Read interactive textbook pp. 140-143. Optional: textbook pp. 228-233 Preview: BrainPop! ElectricityBrainPop! Electricity Slide 14 What is Static Electricity? Static electricity Static electricity is a buildup of electric charge on an object. Unlike electricity used in your home, static electricity doesnt flow. If the charge is strong enough, static electricity can jump from one object to another. Static electricity is what causes dust to collect on your television screen at home! BrainPop! Static Electricity Slide 15 Where Does Static Electricity Come From? Everything is made of matter. All the equipment and supplies located in your classroom are made of matter (even you). Matter is made up of tiny particles. These tiny particles contain different kinds of electric chargepositive (+) and negative(-), and neutral (no charge). Slide 16 Electric Force Electric Force Electric Force is the push or pull between charged objects. Objects that have like charges repel, or push against each other. Objects that have unlike charges attract, or pull on each other. Slide 17 Electric Force Electric forces and magnetic forces are very similar... opposite poles/forces attract each other. Objects do not have to actually touch to exert either an electric force or a magnetic force on each other. Provide students with sets of horse-shoe magnets to experience the magnetic force of attraction and repulsion The students should feel the pull just before they touch! Slide 18 Charging an Object When two objects rub against each other, some electrons may move from one to the other. The object that gains electrons will then have a negative charge. The other object will have a positive charge. So Slide 19 Charging an Object If you rub a balloon on your hair, electrons move from your hair to the balloon. The balloon will have a negative charge (-). Your hair would have a positive charge (+), because electrons have been taken away. If you bring the balloon near a wall, it will stick to the wall because the wall will have an opposite charge (+). Slide 20 Plasma Balls Static Electricity Touch The Power Of Static Electricity And Create A Living Work Of Ever-Changing Art The Plasma Globe, or Inert Gas Discharge Tube, as Nikola Tesla (it's inventor) first called it, is perhaps one of the most beautiful manifestations of plasma (4 th State of Matter). Also known as "Plasma Spheres", "Lightning Globes", "Thunder Domes", and others, these glass spheres with dancing streams of plasma inside them have been looked at, and admired, by people all over the world, in sci-fi movies, science museums, and even some shops. A plasma ball is a glass globe filled with low pressure gases such as neon, argon or xenon. An electrode is placed in the center of the globe and connected to the power supply which gives a high-voltage, high frequency, alternating current. Slide 21 Balloon Experiment Experiment with static electricity. using balloons. Tear little pieces of paperrub the balloon on your head, then hold it near the bits of paper. What happens? Have Fun! Slide 22 Summarizer In your journal, answer the following question. Be prepared to share your answer! charged balloon A charged balloon attracts small bits of paper. Why does this happen? How is it like a magnet attracting paper clips? ThinkPairShare! Slide 23 Electric Current Lesson 2: Electric Current Slide 24 Lesson 2: Electric Current EQ: What is electric current? Vocabulary: conductor, electric cell, electric circuit, electric current (electricity), insulators, simple circuit, parallel circuit, series circuit Slide 25 conductor People are good conductors of electricity, especially if they are in contact with water on a damp floor or ground. Never use an electric appliance in a tub, shower or pool. Never touch an electric cord or appliance while your hands are wet. conductor A conductor is any material that allows negative charges to move through it. Metals make the best conductors. Slide 26 electric cell electric cellAn electric cell is a device that changes chemical energy into electrical energy. Electric cells are found in car batteries. Slide 27 electric current (electricity) electric current An electric current is the flow; or movement, of negative charges through a material. Movement of electrons along the electric pathway! Slide 28 electric circuit The pathway that electric current follows is called an electric circuit. pathway Slide 29 insulators insulatorsMaterials that electric charges do not flow through easily are called insulators. Slide 30 parallel circuit parallel circuit The parts of a parallel circuit are connected so that electric current passes along more than one pathway. Slide 31 series circuit The parts of an electric circuit are connected so that electric current passes through each part, one after another, along a single pathway. Slide 32 Read interactive textbook pp. 144-149. Optional: textbook pp. 234-241 Slide 33 Electric Current What is Electric Current? electric current For electricity to be useful, it must be moving continuously. So static electricity is not very useful. Negative charges can move freely from place to place in a solid. An electric current is the flow; or movement, of negative charges through a material. The energy provided by the moving charges is called electrical energy, or simply electricity. Electricity can be used to do work. However, the energy of the moving charges that make up electricity must be controlled. You must be able to make electricity move and stop moving when you want. And you must be able to control where it goes. When you plug something into an outlet, you tap into an electric current. The electricity flows through the plug and into the object you plugged in BrainPop! Current Electricity Slide 34 Once electricity reaches the place where it is to be used, it is changed into some other kind of energy, such as light in a lamp, heat in a toaster, or motion in a fan. Think about how energy is used and controlled in the school. Cords are plugged into outlets. Switches are flipped, and electric charges move or stop moving through wires. Dials and knobs are turned to change the amount of charge that moves through the wires. This is controlled energy. Electric Current What is Electric Current? Electricity being used in the home. Slide 35 http://www.actewagl.com.au/education/Energy/Electricity/MakingElectricit y/HowGeneratorsWork.aspx Slide 36 Conductors conductor Wires are the pathways through which negative charges flow. Wires are made of materials that carry these charges. A conductor is any material that allows negative charges to move through it. Metals make the best conductors. Copper is the most common metal used for that purpose. The wires used in your school and in your home are probably made of copper. You may be familiar with the expression live wire. The word live is used to describe any conductor in which charges are moving. Moving charges can be dangerous. Your body is a good conductor. If you were to touch a live wire, the charges in the wire would move through your body and you would receive an electric shock. If the wire is carrying enough current, the shock can cause serious injury, or even death. Slide 37 insulators Negative charges do not flow freely through some materials. These materials are called insulators. Some good insulators are rubber, wood, glass, and certain plastics. To make electricity safe to use, conductors and appliances are covered with an insulator. This covering is called insulation. The negative charges can continue to move freely through the conductor, but the insulation will protect a person from the live wire. As long as negative charges have a complete path to follow, they will continue to move through a conductor. But where do all these negative charges come from? Somewhere, there is a device that provides a steady supply of negative charges. It may be a huge generator at an electric power plant, or it may be the chemicals in a tiny cell that runs a wristwatch or calculator.Insulators The metal cables and metal clips of the jumper cables are conductors. You are protected by rubber insulation. Slide 38 Other Resources to Explore Quia