Transcript newelectric
Jean Ladendorf Table of Contents Magnetism and Electricity Table of Contents Science Standard Static Electricity Components of Static Electricity Atom Basics of Static Electricity Electric Currents Current Does It Conduct? Conductivity Table Magnets Bar Magnets vs. Electromagnets Pie Chart Magnets Bar Graph Magnets Show What You Know Task 1 Task 2 Task 3 Task 4 S5P3 Students will investigate electricity, magnetism and their relationship. Static Electricity Bar Magnets & Electromagnets Electric Circuits Conductors & Insulators Basics of Static Electricity Electrons pulled from orbit Surface Charges Repulsion Static Electricity Force Fields Attraction Causes Static Electricity You walk across the carpet, reach for the doorknob and …… ZAP!!!!! You get a shock. What is going on here? As you walk across the carpet, electrons move from the carpet to you. Now, you have extra electrons. When you touch the doorknob, you get a ZAP! The electrons move from you to the knob and you feel the shock. Static Electricity To go back to Basics of static electricity click here Atoms Protons Electrons Neutrons Positive (+) charge Negative (-) charge No charge Electric Circuits An electric circuit is a path around which electricity can travel. There must be a source of electricity, and an unbroken path from one side of the source to the other. Current The flow of electrical charges. Does it Conduct? Conductor – A substances that allow electricity to flow through it. Insulator – A substance that does not allow electricity to flow through it. Conductivity Table Conductors Insulators Paper Clip Rubber Copper Wire Chalk Water Marble Trees Cotton Magnets A magnet is an object that can push or pick up materials made of iron, steel, or nickel. Every magnet has two places where its strength is concentrated, a north and south pole. A magnet that is free to turn will come to rest with its poles aligned in a north-south direction. Unlike poles of a magnet attract each other. Like poles of a magnet repel each other. A magnet can be made from a steel object by striking it with a magnet. Once magnetized, a piece of steel can remain magnetized indefinitely. A magnetic compass works because the earth itself is a magnet: the compass magnet interacts with the earth-magnet. Bar Magnets vs. Electromagnets Bar Magnets Devices in the shape of a bar with magnetic poles at each end that attract iron and produce a magnetic field. Electromagnets Metals that become magnetic when a coil of wire with a electric current is wrapped around it. Magnets in Our Classroom % of Each Type of Magnet 35% 40% Bar Horseshoe Ring 15% 10% Disk Number of Paper Clips Picked Up Our Electromagnet Investigation 10 9 8 7 6 5 4 2 2 1 0 1 2 3 4 Number of Batteries 5 Show What You Know Choose one of the following performance tasks. If you choose to perform either of the tasks which require you to light a light bulb, be sure to show your project to the teacher while the bulb is lit. Performance Task 1 You’re Nuts! Using styrofoam packing peanuts and a piece of wool, devise a plan to attach the packing peanuts to the wall in the shape of your name. Performance Task 2 Light Up! Light Up! Build a closed circuit using at least 1 battery, 1 switch and 1 light bulb. Performance Task 3 Light Up Again! Build a closed circuit using at least 1 battery, 1 switch and 1 light bulb using Challenge 1 on this website. http://www.schoolscience.co.uk/content /3/physics/circuits/circh3pg1.htmll Performance Task 4 Magnet Movie! Cut a scene from construction paper and glue it to the inside of a shoe box. You could make a seashore, a desert – anything goes! Draw and cut out 2 objects that can move around in your scene. Devise a plan to use magnets to move your objects around in the scene that you created.