Magnetism

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What is magnetism?

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Magnetism is a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

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What are magnetic domains?

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Magnetic domains are small regions within a material where the magnetic fields of atoms are aligned in the same direction.

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Which material has the most aligned domains?

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An iron railing has the most aligned domains compared to a pencil eraser or an aluminum can.

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What happens when north and south poles of magnets are brought together?

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North and south poles attract each other.

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What happens when north and north or south and south poles of magnets are brought together?

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North and north or south and south poles repel each other.

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What is a temporary magnet?

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A temporary magnet is a material that can be magnetized but loses its magnetism when removed from a magnetic field.

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What is a permanent magnet?

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A permanent magnet is a material that maintains its magnetism without the need for an external magnetic field.

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What is an electromagnet?

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An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

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What does it mean if a substance is unmagnetized?

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An unmagnetized substance has no aligned magnetic domains and does not exhibit magnetic properties.

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NGSS.MS-PS2-5

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What is the relationship between electricity and magnetism?

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Electricity and magnetism are interrelated; electric currents produce magnetic fields, and changing magnetic fields can induce electric currents.

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