Electricity & magnetism review worksheet Answer Key 1. step-up 10. KS3 science Physics Quiz on "MAGNETS and ELECTROMAGNETS" (8J) CLICK on [?] read feedback. compare student answers. 13/08/50 Electric Circuit Magnetism and Electromagnetism 1 241-205 Electric Circuits Magnetism and Electromagnetism DK 10 Electric Circuit Magnetism and Electromagnetism 2 Chapter 10. Physical Science 8th Graders, be the leaders I know you can be! Physical Science is broken into 3 main units: Astronomy, Chemistry and Physics. The worksheet could be used as a classroom or homework activity, or even as an intervention resource. A second loop of wire sits directly below the first. This collection of interactive simulations allow learners of Physics to explore core physics concepts by altering variables and observing the results. In a hurry? Browse our pre-made printable worksheets library with a variety of activities and quizzes for all K-12 levels. The region around a magnet where the magnetic forces act is the a. Ideally, students will already have experience building simple circuits. Worksheet/Answer key. Electromagnetic waves are classified according to their frequency. On the basis of magnetic properties all the materials may be classified into three classes. Light, produced by charged particles in motion, travel through space, transferring energy. 5 T magnetic field. It is called the electromagnetic spectrum because this radiation is associat-ed with electric and magnetic fields that transfer energy as they travel through space. Biot – Savart law: This law quantifies the amount of magnetic field that is generated around an element when some current flows through it. Horseshoe magnets are very strong. Lesson 2~. Explore how a changing magnetic field can induce an electric current. The area near the magnet where it has enough power to attract things is called its magnetic fi eld. The projectile in the picture is a bar of mass M and length D, which has a constant current I flowing through it in the +y-direction, as shown. This is not true. superteacherworksheets. A simplified diagram of this device is shown above. Inside an electric bell there is a coil of wire called a solenoid. In some types of materials, the motions of atomic electrons are easily aligned with respect to one another, causing an overall magnetic field to be produced by the material. Introduction. ISU EE 2 C. Follow-up question: what does the term retentivity mean, in relation to permanent magnetism? Notes: The answers students find to this question may be philosophically. Some of them are _____ and some are Magnetism comes from _____ found in. b Explanation of Answers 1. compare student answers. Worksheet/Answer key. Magnetic Field Near a Long, Straight, Current-carrying Conductor Electromagnetic Induction and the Lorentz Force:. This means that although they appear to be very different, in fact they're all made of the same kind of vibrations - but at different. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Worksheet: Electricity and Magnetism Test Review. An electromagnetic wave is composed of two ___ fields-an electric field and a magnetic field. While giving a lecture in April of 1820, he notices that the needle of a compass moving away from magnetic north as an electric current from a battery was switched on an off. Why Electronics Magnetism and Electromagnetism? In this section you can learn and practice Electronics Questions based on "Magnetism and Electromagnetism" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc. Wonderful 13 Best Images of Light Worksheets For Middle School Waves and Electromagnetic Spectrum electromagnetic spectrum worksheet - Learning about the exact value of money is among the key classes kids of today can learn. ANSYS Maxwell is the industry-leading electromagnetic field simulation software for the design and analysis of electric motors, actuators, sensors, transformers and other electromagnetic and electromechanical devices. After completing these magnetism worksheets students will be able to: Understand the history of magnetism and answer questions on it’s history. You can change your answer if you want. A uniform electric field is also present. Sketch the magnetic field (the lines of flux) between the permanent magnets and the nearest end of iron bar. Electricity and Magnetism Webquest Click ONLY on the links listed in the handout, which are already hyperlinked to the pages you need to read. If the flux changes: indicate whether it is increasing or decreasing (and in which direction). Magnetism You will find animations that bring the ScienceWiz™ Magnetism Book and projects to life. • Magnets are made of materials like iron, nickel, and cobalt. control and transformation of energy Answer key 1 Answer key 2 Answer key 3 Answer key 4 Circuit worksheet answers. An electric current makes a magnetic field. Maglev trains work on the principles of magnetism and float over a guideway. We have a selection of great videos for use in the. This worksheet may have been altered from the original on the CD-ROM. Note: In this document there is an explanation at the end of each question defining why an answer is correct or why other answers are not. This section contains more than 70 simulations and the numbers continue to grow. This is the basic construction of a generator, where work done to turn the coil is converted to electric energy. Sign in with your email address. Electromagnets and Electricity - 4. Electromagnetic Waves: A. Electromagnetism is the study of magnetism produced by electric charge in motion, as defined by Dictionary. Electromagnets electromagneta magnet made from electricity. electromagnet 3. ioane roberts. Build up of charges by touching 8. Let’s look at some laws which form the back of theory to field of physics. A compass needle is not a magnet. Worksheet 19 – Electromagnetic Induction Supplemental Instruction Iowa State University Leader: Alek Jerauld Course: PHYS 222 Instructor: Dr. Electromagnets Grades 3-4. Electricity and Magnetism: 4. Displaying top 8 worksheets found for - Electromagnetism. Building an Electromagnet Worksheet Answers 1. AP Physics 2: Algebra-Based is a second-year physics course designed for high school students in grade 12 who have completed AP Physics 1. Magnets exert a force of attraction on anything made of iron. Physical Science Concept Review Worksheets with Answer Keys. It experiences an upward magnetic force of 3. Sketch magnetic ield lines for each of the sitaations indicated. 1 learner guide + 2 class clips. Electronic Quiz. Chapter 30 Worksheet 1 Faraday’s Law of Electromagnetic Induction and Lenz’s Law 1. MEMORY METER. Radio waves were discovered by Hertz, and produced by J. About This Quiz & Worksheet. The electromagnetic spectrum Visible light, the electromagnetic radiation that can be observed by the human eye, ranges in wavelength from about 400 to 700 nm. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 12. study of waves, electricity and magnetism, and modern physics. Learn more about magnetism in this article. The average physics major will spend more time understanding and applying the concept of electromagnetic force than he or she will spend studying any other type of force. We expect you enjoyed it and if you need to download the photo in high quality, click the photo, and you will be redirected to the download page of 5th Grade Magnetism Worksheets. The server for HyperPhysics is located at Georgia State University and makes use of the University's network. The correct answer is 45. Discuss the relationship between electric and magnetic fields. Fill in the blanks with words from the box. Electromagnetism. The electromagnetic (EM) spectrum. The best way to remember the information in this chapter is to get a pen and paper and write down your answers before clicking on the Answer link which will take you to the correct page. Visible light waves are the only electromagnetic waves we can see. Magnetism and Electromagnetism. Students will be required to construct an electromagnet at the end of the less. 2 Electromagnetism. The north pole of one magnet will repel, or push away, the north pole of another magnet. cir att cuit electr bat ract net ricity cur mag tery re elec fo com elect pass rent stone omagnet rce trons lode pel Answers:. The x-axis is a measure of time. This collection of interactive simulations allow learners of Physics to explore core physics concepts by altering variables and observing the results. In this page we have Questions and Answers for Class 6 Science Chapter 13 Fun with Magnets. Magnetic domain|A group of atoms whose magnetic fields are aligned in the same direction. Which wave has the:. Magnets attract magnetic materials. The table on the following page divides the electromagnetic spectrum into eight bands by common names although the differences between types are gradual rather than discrete. If the flux changes: indicate whether it is increasing or decreasing (and in which direction). Explore how a changing magnetic field can induce an electric current. In each of the following pairs, circle the form of radiation with the LONGER WAVELENGTH: red light. opposed parallel perpendicular. You can visit an interactive picture which shows permanent magnets and electromagnets in action. Beyond the Mechanical Universe The world of electricity and magnetism, and 20th-century discoveries of relativity and quantum mechanics. This theory, which proposed a continuous electric fluid, not only synthesized a unified theory of electricity and magnetism, but also showed optics to be a branch of electromagnetism. 4 x 10 4 m/s in the positive x-direction. Includes full solutions and score reporting. We hope that the following list of synonyms for the word magnetism will help you to finish your crossword today. It is one thing to discover that magnetism is produced by moving electric charges, but quite another to discover (much less explain) just what a magnetic field is in an ontological sense. Find the training resources you need for all your activities. Review the worksheet as a class (see teacher answer key). Click on Whatapp logo to join oureducation GATE EE group with many students. Explain how the bell works by referring to the parts labelled A – E. A remarkable scientific and technological progress has taken place in the 20 th century. Earth is a giant magnet, and some rocks have this property, too, called magnetism. true false 23. Tie the end of the thread to the paperclip. To get started finding accounting 1 warren reeve duchac 14e answers, you are right to find our website which has a comprehensive collection of manuals listed. SECTION 1 The Nature of Electromagnetic Waves 520 B Before You Read Statement After You Read A or D A or D 1 An electromagnetic wave is a mechanical wave. Electromagnetism. In each of the following pairs, circle the form of radiation with the LONGER WAVELENGTH: red light. It is called the electromagnetic spectrum because this radiation is associat-ed with electric and magnetic fields that transfer energy as they travel through space. Read on to learn more fun facts. Students observe the magnetic field around a closed circuit, investigate how electromagnetism can make a working motor, and build a temporary electromagnet by converting electricity into magnetism. A strong magnet in a junkyard can lift a car; what does this tell you about the relative strength of the magnetic and gravitational forces on the car? 7. Conveniently we’ve called them EMF’s. 3Magnetic Force Applications: Galvanometers-Motors (Torque) Homework #129 y x B CONVENTIONAL CURRENT CONVENTIONAL CURRENT Problem 04 Problem 05 x y B ANSWERS: 01. Electromagnetism: The combined effects of electricity and magnetism. In this lesson we discuss the magnetic effect on an electric current as well as discuss the electromagnetic. Some of the worksheets displayed are Building an electromagnet work, Building an electromagnet work answers, Magnetism electricity vocabulary list definitions, Work 1 the characteristics of an electromagnet, Making an electromagnet, Magnetism and electromagnetism, Basic electromagnetism and electromagnetic induction. Consider the following two waves (shown on your worksheet, not here). Bill Nye: Magnetism Video Worksheet mrcusack. 2 T uniform magnetic field. Worksheets are Magnetism and electromagnetism, Building an electromagnet work, Work for magnetism and electricity, Magnetic attraction, Basic electromagnetism and electromagnetic induction, Lesson plan electricity and magnetism, Magnetism and electromagnetism, Electricity and magnetism. The simple experimental setup described in the “Answer” section for this question is sufficient to dispel that myth, and to illuminate students’ understanding of this principle. Some of the worksheets for this concept are Magnetism and electromagnetism, Magnets, Grade 5 standard 3 unit test a magnetism multiple choice c, Science lesson plan 6th grade curriculum total activities 73, Grade 6 science electricity, Making an electromagnet, Fifth grade unit on. Conceptual Physics: Electromagnetism and Electromagnets Units. Explain what it means when we say a substance is magnetic. It had an enormous impact on physics, overthrowing the mechanical theory of all physical phenomena which was dominant until the end of that century, and leading to the discovery of the electromagnetic nature of light, to special relativity and to much else. Return to: Section A - Top. Caution: don't get too hung up on this keyboard idea - sound waves are NOT part of the electromagnetic spectrum. Electromagnets - Displaying top 8 worksheets found for this concept. Electricity and Magnetism The relationship between electricity and magnetism, including how electromagnetism and induction work. A second loop of wire sits directly below the first. How can I use this KS3 magnetic force worksheet in class? Use this KS3 worksheet to develop understanding or to reinforce teaching of magnetism and magnetic force. Cathode ray oscilloscope MCQs, electromagnetism quiz questions and answers for admission and merit scholarships test. Vv1lY docs a compass needle move when it is ncar a magnetic field? a. You can freely ask all your electromagnetism questions and get immediate electromagnetism answers which will make your assignment easier to accomplish. Electromagnetism. PART 1 - 1. Return to: Section A - Top. Topics covered includes: Permanent Bar Magnets, Electromagnets, Jump Rope Generator, Induction in an Aluminum Can, Geomagnetism, Space Weather. Using worksheets, globes, and a single light source, students review time-keeping on Earth—time zones and Universal Time. In ferromagnetic materials the magnetic effects of the electrons do not fully cancel each other out, atoms then are like tiny magnets. Since they weren't originally magnetic, they lose their magnetic characteristics over time. A battery, a loop of wire, and a switch make a circuit below. Online shopping for Books from a great selection of Electricity, Magnetism & more at everyday low prices. They only work when electricity is running through them. In general, AC generators, motors and other electrical equipment are simpler, cheaper and more reliable than their DC counterparts. The scientific method is a process that helps you find answers to your questions about the world. We have a selection of great videos for use in the. Strength, charge 6. I have attempted to put together a concise set of notes that describes the basics of electromagnetic theory to an audience of undergraduate mathematicians. Electric field 4. A comprehensive database of more than 25 magnetism quizzes online, test your knowledge with magnetism quiz questions. In this electromagnetism and electromagnetic induction worksheet, high schoolers answer 12 questions about electricity, about the magnetic fields in given diagrams, about the right-hand rule and about electric current and voltage in. This will help them to get better marks in examinations. An electric charge is a fundamental property of matter. transformer 9. magnetic field. This is one of the most major things that comes up when you're studying magnetic fields for the first time and really it first comes up when you do cross products maybe in pre-calculus but people kind of forget or maybe haven't taken pre-calc so let's talk about it because it's not difficult but its easy to kind of mess up if you're not used to how it. Perhaps you came through search engine, after that you locate this website and determined to see this site, thanks for that. The idea of induction is one of the most important in physics. MAGNETIC FLUX AND ELECTROMAGNETIC INDUCTION WORKSHEET. ) Energy resources and energy transfer 5. Labs & Activities Directory. Magnetic flux and density MCQs, electromagnetism and magnetic field quiz questions and answers for admission and merit scholarships test. KS3 science Physics Quiz on "MAGNETS and ELECTROMAGNETS" (8J) CLICK on [?] read feedback. In this page we have Questions and Answers for Class 6 Science Chapter 13 Fun with Magnets. This blog is for grade 11 students who are studying physics. The field is directed into the page, perpendicular to the plane of the loop, as shown above. Hang them close to each other and see what happens. The _____ of an electromagnet is turned on or off when the electric current is turned on or off. Maglev is the shortened form of magnetic levitation. The goal of these guides is to give students an appreciation of the major role magnetism plays on Earth and in space, and ultimately enable them to use NASA data as “scientists” researching our magnetic connection to the Sun. Skills Worksheet Directed Reading B Section: Magnetism from Electricity Circle the letter of the best answer for each question. Bar magnet. Any electromagnetic wave produced by currents in wires is classified as a radio wave, the lowest frequency electromagnetic waves. Electricity and Magnetism The relationship between electricity and magnetism, including how electromagnetism and induction work. The vertical component of earth’s magnetic field is 0. Electromagnetism. Electromagnetic (EM) radiation is a form of energy that is all around us and takes many forms, such as radio waves, microwaves, X-rays and gamma rays. Review the worksheet responses of your students. It can be turned on and off, and its strength can be increased in a number or ways. magnetic field. Sign in with your email address. 20 m has a total resistance of 0. Suppose the magnetic field is from right to left and the motion of the wire is downwards then according to the right hand rule the induced current will be in the straight direction. b Explanation of Answers 1. Electromagnets usually consist of wire wound into a coil. Some of the worksheets for this concept are Electricity and magnetism, What is magnetism, Simple machines questions, Magnetism and electromagnetism, Table of contents, Physics work lesson 20 magnetism, Magnets, Magnetic attraction. The most familiar examples of magnetism are the household refrigerator magnets and the compass. Diagram should look like this Î Students can use arrows for the magnetic field. The sun's heat is not transmitted through any solid medium, but through a vacuum. Explain your answer. Bill Nye: Magnetism Video Worksheet mrcusack. Electroscope and electrophorus Charge up the plate using the electrophorus, by first rubbing the lower plate with the rubber glove, then placing. The classical (non-quantum) theory of electromagnetism was first published by James Clerk Maxwell in his 1873 textbook A Treatise on Electricity and Magnetism. Electricity & Magnetism. Answer Key for Chapter 11 Quiz. One useful characteristic of current is that it creates its own magnetic field. Using Is it. Electromagnetic Induction. Electromagnetism. Electromagnetism. The answers are exactly what one should write in point to point as in mark schemes. WORKSHEET FOR MAGNETISM AND ELECTRICITY. Student Worksheet. Where maps point to as 4. Explain your observations. Interactive Java Tutorials. Read the link: The History of Electromagnets. true false 23. Right here we have 20 great images with regard to 5th Grade Magnetism Worksheets. This page will help you answer questions such as How do you make a magnet using electricity?. Once you have answered all the questions, click the "Done" button below the. electromagnets d. Experienced former MOE Teacher focuses on every student by adopting a customised approach in small class settings. The solution worksheets will certainly demonstrate the progression concerning how to repair the difficulties. What it means when we say a substance is magnetic is that a substance can be picked up by a magnet. pdf - Free download Ebook, Handbook, Textbook, User Guide PDF files on the internet quickly and easily. All Chapter 5 - Magnetism And Matter Exercises Questions with Solutions to help you to revise complete Syllabus and boost your score more in examinations. Connect with social media. The Earth has magnetism because of the electrical currents of its core. Electromagnetic waves including light and invisible light are but one aspect of this marvelous thing - electromagnetism. permanent magnet 2. Conveniently we’ve called them EMF’s. Our highly qualified team of professionals is organized to give solutions to the electromagnetism problems that students face every day. Radiant energy is the energy of electromagnetic waves. It is one thing to discover that magnetism is produced by moving electric charges, but quite another to discover (much less explain) just what a magnetic field is in an ontological sense. Electromagnetism and magnetism. This worksheet may have been altered from the original on the CD-ROM. Electromagnets Grades 3-4. For instance there are many worksheet that you can print here, and if you want to preview the Electromagnetic Radiation Worksheet simply click the link or image and you will take to save page section. The farther away from the magnet an item is, the weaker the magnetic fi eld is. Conceptual Physics: Electromagnetism and Electromagnets Units. Suppose the magnetic field is from right to left and the motion of the wire is downwards then according to the right hand rule the induced current will be in the straight direction. Follow-up question: what does the term retentivity mean, in relation to permanent magnetism? Notes: The answers students find to this question may be philosophically. Objects that keep their magnetic properties for a long time are called a. This is a worksheet to accompany the crash course video for Physics #32: Magnetism. When you increase the distance the charge strength decreases 9. It is the physics you need to know be an effective leader. The worksheet could be used as a classroom or homework activity, or even as an intervention resource. INSTRUCTIONS: Print a copy of this worksheet and answer all questions. The x-axis is a measure of time. Unit 8 - Mechanical Waves and Simple Harmonic Motion. Electromagnetic Induction Multiple choice Questions and Answers pdf,Objective type Questions,mcqss,lab viva,seminar topics,online quiz important download. Where maps point to as 4. Worksheet - 2 [Magnetism and Matter] Worksheet - 3 [Electromagnetic waves] Worksheet - 4 [Current Electricity] Worksheet - 5 [EMI] Mathematics:. When you increase the distance the charge strength decreases 9. Electricity and Magnetism Magnetism and electricity are closely related phenomena. Identify equipment and conditions that produce induction. A compass needle is not a magnet. being induced in the conductor. Alike (same charge) 2. An example of this is light. Displaying all worksheets related to - Electromagnetism. step-up 10. ANSWER KEY. This section contains more than 70 simulations and the numbers continue to grow. Physics Magnetic Field Worksheet Solutions Part I 1. Once you have answered all the questions, click the "Done" button below the. pdf), Text File (. We have a selection of great videos for use in the. They will hopefully remember this from the 5th grade curriculum. compare student answers. control and transformation of energy Answer key 1 Answer key 2 Answer key 3 Answer key 4 Circuit worksheet answers. (100 points) Group Member Jobs. This can be due to a conductor moving through a magnetic field or a conductor being in a fixed position within a changing magnetic field, such as that due to an alternating current. Electromagnets and motors. We have a selection of great videos for use in the. ) Radioactivity and particle. Magnetism Crossword 1 and Magnetism Crossword 2: These crosswords review concepts related to magnetism such as magnetic fields, and electromagnetism. generator 6. Magnetism; Applications of Magnetic Field; Magnets and Magnetic Field; Magnetic Field Produced by. A series of problems for pupils to solve using their knowledge of magnetism and electromagnetism. The discovery of electromagnetism and how it relates to electricity, and Faraday's law. When a train runs on the rails at a speed of 60 Km/hr, then the induced potential difference between the ends of its axle will be (a) 10 –4 V (b) 2 × 10 –4 V (c) 10 –3 V (d) Zero. The solution worksheets will certainly demonstrate the progression concerning how to repair the difficulties. Labs & Activities Directory. 2 An electromagnetic wave is produced by a mov-ing particle. Unit 8 - Mechanical Waves and Simple Harmonic Motion. Here you will find all we have for Magnetism Worksheet. Electricity Unit Test Study Notes. being induced in the conductor. Magnetism, phenomenon associated with magnetic fields, which arise from the motion of electric charges. 3 worksheets with answers covering the OCR Physics A level Specification on Work, Energy, Power and Momentum Energy, Power & Momentum Multiple Choice Questions. What is the kinetic energy of the point charge? Ans. Explain how the complementary principles of electromagnetism and electromagnetic induction manifest themselves simultaneously in the same wire coil to produce self-induction. THESE ARE ANSWERS TO THE WORKSHEET ON ELECTROMAGNETISM OF IGCSE PHYSICS. A comprehensive database of more than 25 magnetism quizzes online, test your knowledge with magnetism quiz questions. Questions start off easy. Electromagnets and Electricity - 4. A few countries already use powerful electromagnets to build high speed trains. SECTION 1 The Nature of Electromagnetic Waves 520 B Before You Read Statement After You Read A or D A or D 1 An electromagnetic wave is a mechanical wave. Sign up for free session and clear your doubts. An electromagnetic wave is made up of vibrating electric and magnetic fields that move through space or some medium at the speed of light. Electromagnetic Waves. The discovery of electromagnetism and how it relates to electricity, and Faraday's law. ship between magnetism and electricity. Answer lesson EQ. 1 Magnetism is the force by which objects are attracted to other objects or repelled by other objects. octet azimuthal/orbital quantum number photon. permanent magnet 2. Worksheet - Magnetic Problems. A few countries already use powerful electromagnets to build high speed trains. When a bar magnet moves into a coil of wire a current is induced. Electromagnetism lab worksheet 1. Electromagnetic waves are classified according to their frequency. 3 A moving electric charge is surrounded by an electric field and a magnetic field. The type of electromagnetic radiation produced depends on the difference in energy between the energy levels. The strength of a magnetic field or magnetic flux density B can be measured by the force per unit current per unit length acting on a current-carrying conductor placed perpendicular to the lines of a uniform magnetic field. magnetism worksheet. edu is a platform for academics to share research papers. cir att cuit electr bat ract net ricity cur mag tery re elec fo com elect pass rent stone omagnet rce trons lode pel Answers:. Cross-Curricular Reading Comprehension Worksheets: D-23 of 36 An object that attracts metals, especially iron, is called a magnet. See what you know about electromagnetic induction with this interactive quiz and its corresponding printable worksheet. Explain your observations. 4 x 10 4 m/s in the positive x-direction. Activity Questions: 1. Process Skills Observe, measure, form a hypothesis, collect data, interpret data, identify and control variables, communicate, draw conclusions Background Magnetism is an invisible force caused by moving. Electromagnetism is a branch of physical science that describes the interactions of electricity and magnetism, both as separate phenomena and as a single electromagnetic force. At a point due north of the wire, what is the direction of the magnetic fleld that the wire produces? (a) North. Fig 1 is positive fig 2 is negative. Bill Nye: Magnetism Video Worksheet mrcusack. magnetic domains c. It is called the electromagnetic spectrum because this radiation is associat-ed with electric and magnetic fields that transfer energy as they travel through space. It is one thing to discover that magnetism is produced by moving electric charges, but quite another to discover (much less explain) just what a magnetic field is in an ontological sense. motors_and_electromagnetic_induction_answers. Learners explore electricity by completing a scientific worksheet in class. After completing these magnetism worksheets students will be able to: Understand the history of magnetism and answer questions on it's history. Electric motors (see image below) use the Motor Effect, described in the worksheet 'Magnetism and Electromagnetism', to spin a coil of wire inside a magnetic. It aligns all of the domains in the metal in one orientation. Try Prime Electromagnetism Books. attract repel attract repel attract repel attract repel attract repel attract repel attract repel attract repel attract repel ANSWER KEY. 1 learner guide + 2 class clips. That is the strongest and most familiar type of. The most familiar examples of magnetism are the household refrigerator magnets and the compass. Bill Nye the Science Guy’s “Magnetism” episode is totally attractive.