# Magnet and Electromagnetic Fields and Interactions

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In this series of hands on activities students are asked to investigate how two magnets interact, how to build an electromagnet, and the fields and forces around magnets and electromagnets.

Required materials: several different types of magnets, iron filings or pipe cleaners (cut up), batteries, wire, iron nails and paper clips or similar.

Set includes
Engage: Page 3-4 – playing with the materials and inventing ways to test the magnets.
Explore: Page 5 – directed investigation into weakening repulsion force at increasing distance
Explain: Page 6-7 – analysis of experimental results
Elaborate: Page 12-15 –apply and practice learned concepts
Evaluate: Page 16-17 - check for understanding
Engage: Page 8-9 – a challenge
Explore: Page 10-11 – investigating the magnetic fields of magnets and magnet pairs with iron filings or pipe cleaners.

Plus on Electromagents
Explain: Page 6-7 – students are asked to identify and explain the force at a distance
Elaborate: Page 12-15 – given pictures of iron filings in a field students are asked to apply learned concepts
Evaluate: Page 16-17 - check for understanding

The Ohio State 8th Grade Standards covered by these activities are:

Forces between objects act when the objects are in direct contact or when they are not touching. Magnetic, electrical and gravitational forces can act at a distance.

A field model can be used to explain how two objects can exert forces on each other without touching. An object is thought to have a region of influence, called a field, surrounding it. When a second object with an appropriate property is placed in this region, the field exerts a force on and can cause changes in the motion of the object.

Magnetic fields exist around magnetic objects. If a second magnetic object is placed in the field, the two objects experience magnetic forces that can attract or repel them, depending on the objects involved. Magnetic force weakens rapidly with increasing distance. Magnetic field lines can be seen when iron filings are sprinkled around a magnet.

Electricity is related to magnetism. In some circumstances, magnetic fields can produce electrical currents in conductors. Electric currents produce magnetic fields. Electromagnets are temporary magnets that lose their magnetism when the electric current is turned off. Building an electromagnet to investigate magnetic properties and fields can demonstrate this concept.

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Total Pages
19 pages
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Teaching Duration
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