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. It is a fundamental force of nature.

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What materials are attracted to magnets?

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Materials that are attracted to magnets include ferromagnetic materials such as iron, nickel, and cobalt.

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What are the poles of a magnet?

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The poles of a magnet are the regions where the magnetic force is strongest. Every magnet has a north pole and a south pole.

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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. It can be turned on and off.

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How can you increase the strength of an electromagnet?

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You can increase the strength of an electromagnet by increasing the current through the wire, using a larger iron core, or increasing the number of loops of wire around the core.

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What are magnetic field lines?

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Magnetic field lines are invisible lines that represent the direction and strength of a magnetic field. They emerge from the north pole and enter the south pole of a magnet.

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What is a compass?

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A compass is a device that uses a free-moving magnetic needle to show direction. The needle aligns itself with the Earth's magnetic field.

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What is the Earth's magnetic field?

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The Earth's magnetic field is the magnetic field that extends from the Earth's interior out into space. It protects the planet from solar wind and cosmic radiation.

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What is a lodestone?

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A lodestone is a naturally magnetized piece of the mineral magnetite. It is one of the first known magnetic materials.

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NGSS.MS-PS2-3

Front

What happens when like poles of magnets are brought together?

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When like poles of magnets (north-north or south-south) are brought together, they repel each other.

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