PPT-Essential Questions How do magnetic poles interact

Why does a magnet exert a force on distant magnetic materials Why are some materials magnetic but others are not How do magnetic domains model magnetic behavior Magnetism Copyright McGrawHill Education. What is magnetism?. Force of attraction or repulsion due to electron arrangement. Magnetic forces are the strongest at the poles. Magnets have two poles: North and South. Magnetic poles and fields. Magnets always have two poles. Magnet Type. The MRI magnet used at MCH is the superconducting type. Superconducting magnets use a special wire which loses all resistance when cooled to -270 degrees Centigrade. This requires liquid helium to surround the magnet wire. Current is applied to the wire during instillation, which generates the magnetic field as it flows. Superconducting magnets are normally FULLY ENERGIZED at all times.. By . Dr. Hilarie B. Davis, . hilarie@techforlearning.org. Dr. Bradford T. Davey, . brad@techforlearning.org. . Objectives for our time together. 1) Understand what makes a question “essential”. 2) Understand the role essential questions can play in Next Gen teaching and learning. What causes a compass to behave as it does?. Earth’s gravity. Earth’s shape. Earth’s geographic north pole. Earth’s magnetic field. Magnetic poles that are alike. attract each other. repel each other. ~Magnetosphere. Earth’s Magnetic Field. The Earth acts like it has a giant bar magnet buried in it.. The magnetic field of the Earth is caused by convections currents of the molten iron and nickel interior of the Earth. Magnes. who discovered that the iron tip on his staff was mysteriously attracted to a rock.) This rock was a naturally occurring magnetic rock called lodestone. . Show students a piece of magnetite, and show them that a small magnet is attracted to it. Investigate and describe that magnets can attract magnetic materials and attract and repel other magnets.. What is Magnetism?. Let’s . Explore. What happens if you put together two magnets?. Do they become stronger together? . Magnets attract objects made of magnetic materials. Magnetic materials include the elements . iron, nickel, cobalt, . alloys containing some of these such as . steel . and some of their compounds.. stainless steel. 21. History of Magnetism . In 1269, Pierre de Maricourt of France found that the directions of a needle near a spherical natural magnet formed lines that encircled the sphere and passed through two points diametrically opposite each other, which he called the poles of the magnet. Subsequent experiments showed that every magnet, regardless of its shape, has two poles, called North (N) and (S) poles, that exert forces on other magnetic poles similar to the way electric charges exert forces on one another. That is, like poles (N-N or S-S) repel each other, and opposite poles (N-S) attract each other. material due to the arrangement of its atoms, particularly its electrons.. Lik. e poles will repel, opposite poles will attract.. Magnetic field lines describe the structure of magnetic fields in three dimensions.. LESSON #1 – . World War 1 Begins. (1/11). VOCABULARY 6-1. Prussia in 1871 (184). Triple Alliance (184). Franco-Russian Alliance (184). Militarism (184). Triple Entente (185). Nationalism (185). Self-determination (185). Magnes. who discovered that the iron tip on his staff was mysteriously attracted to a rock.) This rock was a naturally occurring magnetic rock called lodestone. . Show students a piece of magnetite, and show them that a small magnet is attracted to it. Magnetic field. Domain. Pole. solenoid. A). Magnetic field. The marked end of a compass needle always points directly to. A) earth’s geographic south pole. B) earth’s geographic north pole. C) magnet’s south pole. Questions. By: DonReita Nelson, M.Ed.. Goals . To understand what an essential question is. To be able to write effective essential questions. An Essential Question . is:. A question . that lies at the heart of a subject or a curriculum .