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

[Free Registration/Login may be required to access all resource tools.] The Earth's magnetic field and how it protects life on Earth, and how it is used for navigation.

Captivating information about how frogs can levitate in magnetic fields. Easy to understand, it also explains how the Earth's magnetic field is produced.

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

[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]

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...

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!

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...

Hands-on activities help students develop an understanding of Earth's magnetic field. Students use iron filings to explore the magnetic field around a magnet, record their observations, then apply their experience with the magnet to...

[Free Registration/Login Required] A site containing an animation of a compass and a short quiz over the topic.

This site is a description of the earth's magnetic field, including a section on the "Dynamo effect," a proposed explanation for the origin of the earth's magnetic field.

Hands-on project where the learner constructs a magnetometer to monitor and measure changes in earth's magnetic field. These changes can then be used to track solar storms.

Topics covered in this slideshow include the Earth's interior, seismic S- and P-waves, the crust and mantle, phase boundaries encountered by seismic waves, the Earth's internal heat, gravity and density, gravitational anomalies, the...

[Free Registration/Login may be required to access all resource tools.] Explains how Earth is a magnet, its geographic and magnetic poles, and its magnetic field.

[Free Registration/Login may be required to access all resource tools.] Why the Earth is a magnet and how its inner structure relates to its magnetic field.

Illustration of Earth's magnetic field lines.

Find out how the Earth's magnetic field functions.

Site from NASA contains a collection of 91 questions pertaining to the Earth's atmosphere, magnetic field, ionosphere, rotation and origin of life.

Ever wonder how a compass worked to point you to the Arctic? Explore the interactions between a compass and bar magnet, and then add the earth and find the surprising answer.

Wikipedia.com provides an excellent introductory site on magnets. Including basic information describing different types of magnets and their characteristics.

In this activity, Students can use a Magnetic Field Sensor to measure the magnetic field of the Earth and to determine magnetic north. They will also calculate the magnetic inclination and declination at their location.

This site provides a very interesting overview of our home planet, Earth. Content includes a focus on the atmosphere, the pull of gravity, and the active surface.

Learn how to make a simple compass right at home. [1 min, 21 secs]

The earth's magnetic field is due for a reversal. Find out what causes the magnetic field and view an animated model that shows it reversing.