Curated OER
The Invention of the Telephone
Students study the history of the telephone and its inventor. In this communications lesson students complete a tuning fork experiment to further demonstrate how sound is produced.
TeachEngineering
Teach Engineering: Visualizing Magnetic Field Lines
In this activity, students take the age old concept of etch-a-sketch a step further. Using iron filings, students begin visualizing magnetic field lines. To do so, students use a compass to read the direction of the magnet's magnetic...
TeachEngineering
Teach Engineering: Drawing Magnetic Fields
Students use a compass and a permanent magnet to trace the magnetic field lines produced by the magnet. By positioning the compass in enough spots around the magnet, the overall magnet field will be evident from the collection of arrows...
Georgia Department of Education
Ga Virtual Learning: Forces on Moving Charges in Magnetic Fields
In this interactive tutorial students will explore magnetic force. Students will observe interactions of magnets and study magnetic fields. The source of magnetic properties is believed to be moving charge. Since moving charge produces...
National High Magnetic Field Laboratory
Magnet Academy: Drawing Field Lines
A well illustrated activity where students investigate and draw the magnetic field lines created with a bar magnet and a compass.
TeachEngineering
Teach Engineering: Circuits and Magnetic Fields
In this activity, students use the same method as in the activity from lesson 2 to explore the magnetism due to electric current instead of a permanent magnet. Students use a compass and circuit to trace the magnetic field lines induced...
National High Magnetic Field Laboratory
Magnet Academy: Seeing Magnetic Field Lines
Compasses and special metal filings help you "see" the invisible force of magnetic fields. [2:25]
TeachEngineering
Teach Engineering: Whose Field Line Is It, Anyway?
Students teams each use a bar magnet, sheet of paper and iron shavings to reveal the field lines as they travel around a magnet. They repeat the activity with an electromagnet made by wrapping thin wire around a nail and connecting...
CK-12 Foundation
Ck 12: Physics Simulation: Field Lines
[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]
Florida State University
Florida State University: Inductance
This article surveys inductance and its different forms. It discusses numerous topics associated with inductance such as Faraday's Law, self and mutual inductance, inductors, and magnetic field lines.
TeachEngineering
Teach Engineering: The Electric and Magnetic Personalities of Mr. Maxwell
Students are briefly introduced to Maxwell's equations and their significance to phenomena associated with electricity and magnetism. Basic concepts such as current, electricity and field lines are covered and reinforced. Through...
University Corporation for Atmospheric Research
Ucar: The Sun Earth Connection: Planet Magnet
Hands-on activities help learners 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...
Physics4kids
Physics4 Kids: Electricity and Magnetism: Magnetic Fields
Explains magnetic fields, how they differ from electric fields, and attraction and repulsion.
Exploratorium
Exploratorium: Science Snacks: Magnetic Lines of Force
In this activity discover the direction of the magnetic field by making patterns of the field visible with iron filings.
Exploratorium
Exploratorium: Science Snacks: Magnetic Shielding
An activity where students test different materials to see which allow magnetic lines of force to pass through them and which block the magnetic lines of force.
National Earth Science Teachers Association
Windows to the Universe: Magnetic Field Reversals
Provides a short article, with embedded links, about magnetic reversals and how they might occur.
Curated OER
Science Kids: Science Images: Iron Filings Magnetic Field
Iron filings are used in this picture to show the path of magnetic field lines created by a magnet.
Curated OER
Physics4 kids.com: Earth's Magnetic Fields
Illustration of Earth's magnetic field lines.
Other
Quackwatch: Power Lines and Cancer Nothing to Fear
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.
CK-12 Foundation
Ck 12: Plix: Bar Magnet Magic: Ferromagnetic Material
[Free Registration/Login Required] Explore how magnets affect objects by dragging the bar magnet around and observing how the field lines within each area of the material change.
Florida State University
Florida State University: Lenz's Law
Lenz's Law is defined and demonstrated with an interactive Java applet that shows the relationship between field lines of a magnetic and a conductor ring.
Other
Ithaca Hs Ny/electrical Generator Ac or Dc/applet
What a lovely little applet! You can speed/slow it, change it from AC to DC, plot the voltage as it rotates, change direction, control other information. Real neat.
Exploratorium
Exploratorium: Science Snacks: Curie Point
Did you know that a piece of iron can lose its magnetism if heated too high? There is a point called the Curie point when iron is heated to a high enough temperature that its iron atoms are scrambled and can't line up to form a magnetic...