This site gives a good overview of magnetic reversals. Discusses continental drift, ocean floor magnetism, and sea-floor spreading.

Discusses discoveries that laid the foundation for scientists' understanding of paleomagnetism, continental drift, and magnetic reversals.

An activity exploring eddy currents by having a magnet fall through a metallic and nonmetallic tube.

Use this site to learn about the inventor of the electro-magnetic motor, Nikola Tesla. Find out why Tesla's experimentation with alternating current was so important to later inventions and use of electricity.

This site provides links to a variety of government-sponsored overviews and articles on electromagnetic fields and their associated health risks.

This site offers a very nice, detailed explanation of auroras along with some inspiring images and videos.

This site explores the history of power lines and cancer associations, as well as dispelling the myth. The science is explored by citing known facts, studies and experts in the field.

These demonstrations allow students to develop a conceptual understanding of geophysical principles. Each demonstration provides background information and a complete explanation of how to use and discuss the demo in class.

Students use a simple set up consisting of a current carrying wire and a magnet to explore the forces which enable biomedical imaging. In doing so, students run a current through a wire and then hold magnets in various positions to...

The unit contains lessons and a presentation that allow students to explore the Sun through images and investigate how magnetism from the Sun interacts with the Earth's magnetic field during space weather events.

This lesson will introduce what a magnet is and how magnets work.

Discusses some history of magnets, the science of magnetism, and interesting facts about them.

This site from MedicineNet.com gives an MRI description, why they're performed, risks, and patient preparation. A thorough explanation of the process is provided.

What is a magnet? In this activity, learners will investigate magnets and what they attract. They will observe, explore, ask questions, predict outcomes, then discuss and record their findings.

This site describes how to make several toys with magnets. It also gives an explanation of how they work and where to get the right kind of magnets.

Play ball! Add charges to the Field of Dreams and see how they react to the electric field. Turn on a background electric field and adjust the direction and magnitude. (Kevin Costner not included). Java required.

From an online teacher demonstration book. Includes a description and explanation of five demonstrations on a variety of magnetism topics. Interesting and captivating demos.

Take this 10 question multiple choice quiz on electricity and magnetism.

Step-by-step illustrated instructions show how to build a simple electric motor using everyday materials to make a wire coil spin. An explanation of the science involved is given at the end, as well as tips on troubleshooting any...

Students learn the relationship between the electric and magnetic fields. Specifically, they verify that a magnetic field is created in a current carrying coil of wire and a changing magnetic field can induce a current in another coil of...

An electromagnetic induction model that simulates an electric generator made from a conducting loop rotating in a uniform magnetic field and connected to an ammeter.

This lab is designed to have students look at the deflection of a cathode ray beam using magnetic fields and electric fields.

This article helps explain the concept of electromagnetism as well as magnetic fields and the properties of the speed of light.

In this activity, students will create their own simple compass, be able to explain how a compass works, understand that the Earth's magnetic field has both horizontal and vertical components, and learn more about cardinal directions.