A well illustrated activity where students investigate and draw the magnetic field lines created with a bar magnet and a compass.

This comprehensive study guide covers the main terms and concepts needed for an earth science unit on the earth's shape and magnetic field. Review questions are included at the bottom of the study guide.

[Free Registration/Login may be required to access all resource tools.] Examines Earth's magnetic field.

Get information about rotating magnetic fields and how electric machines use them for their operation. Discusses synchronous speed and number of poles on an electrical machine. The accompanying article discusses the topics found in the...

This instructional activity discusses the result of a charge being subject to both electric and magnetic fields at the same time. It covers the Hall effect, velocity selector, and the charge to mass ratio. Given several sample problems,...

Here is the site to help you learn all about magnetism and magnets! Find out what a magnet is and how it works. Click for additional details on charges, conductors, magnetic fields, currents, resistance as well as the Laws of Faraday and...

[Free Registration/Login Required] Understand the size and shape of the Earth's magnetic fields, explore the magnetic fields of other planets using this interactive simulation. A PDF worksheet and a video tutorial are also available. [2:35]

Move a bar magnet or an electromagnet around to see how the magnetic fields change. Requires Java.

You can use a bar magnet and a compass to get a rough idea of the strength of Earth's magnetic field. Read this article to find out how!

When a magnetic field is applied perpendicular to the flow of current, the field causes resistance in the current. This is the Lorentz force at work, and can be observed well in the Hall effect. (Java tutorial)

Find out more about German physicist Wilhelm Weber, who developed and enhanced a variety of devices for sensitively detecting and measuring magnetic fields and electrical currents.

Learn about the Lorentz force with the help of this tutorial, in which a wire fashioned into a pendulum moves inside a magnetic field. (Java tutorial)

Compasses and special metal filings help you "see" the invisible force of magnetic fields. [2:25]

A simulation which shows the field of a magnetic dipole or quadrupole using compass needles indicating direction and relative field strength. Change the angular orientation of the dipole, and a movable compass shows the magnetic field...

[Free Registration/Login may be required to access all resource tools.] This lesson examines how moving electric charges are affected when inside a magnetic field. Students are shown how to calculate the force on a single moving electric...

See drawing from Hans Christian Orsted's lab notebook showing an experiment in which an electric charge passing through a wire seemed to create a magnetic field!

Students use iron filings to explore the magnetic field around a magnet and record their observations then apply their experience with the magnet to understand the magnetic field around Earth.

The purpose, life, and hazards of the Earth's magnetic field are discussed as they relate to magnetic storms. This includes their impact on animals, auroras, and even compasses. Interactive features are also included in this...

Explains magnetic fields, how they differ from electric fields, and attraction and repulsion.

Informational fact sheet on electricity with emphasis on electric and magnetic fields.

Magnets can be used as toys, tools, and more. Identify how magnets work, what a magnetic field is, as well as what a magnetic force is.

Did you know that not all trains run on tracks? Some of the world's fastest trains are magnetic levitation trains (maglev). This means that the carriage of the train is suspended over the rails with no support, but only with magnetic...

An in-depth look at how isostasy works and the processes taking place during glaciation and the melting of glaciers. Looks at gravity and the effects of density differences within the crust and mantle, and at Earth's magnetic field and...

This lesson plan begins with a demonstration prompting students to consider how current generates a magnetic field and the direction of the field that is generated. Through formal lecture, students learn Biot-Savart's law in order to...