Section 1
Magnets Create Invisible Force Fields
Magnets have north and south poles that attract or repel each other. These forces create magnetic fields, invisible lines of force that are strongest at the poles and weaken with distance.
Grade 5 students explore magnetism in this lesson from Chapter 6 of Science: A Closer Look, learning how magnetic poles attract and repel, how magnetic fields work, and how Earth itself acts as a giant magnet. The lesson also introduces key concepts including electromagnets, generators, alternating current, and magnetic levitation. Hands-on inquiry activities using iron filings, bar magnets, and a compass help students observe and compare magnetic forces in action.
Section 1
Magnets Create Invisible Force Fields
Magnets have north and south poles that attract or repel each other. These forces create magnetic fields, invisible lines of force that are strongest at the poles and weaken with distance.
Section 2
Electric Currents Generate Magnetic Fields
When electricity flows through a wire, it produces magnetism. Coiling the wire around iron creates an electromagnet whose strength increases with more coils, more current, or adding iron.
Section 3
Generators Convert Motion Into Electricity
When a coil of wire moves through a magnetic field, electrons are pushed through the wire, creating electric current. This principle allows generators to transform mechanical energy into electrical energy.
Section 4
Magnets Push Objects Without Touching
Magnetic levitation occurs when repelling magnetic forces counteract gravity. This allows objects to float above magnets, enabling maglev trains to hover above tracks without friction.
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Section 1
Magnets Create Invisible Force Fields
Magnets have north and south poles that attract or repel each other. These forces create magnetic fields, invisible lines of force that are strongest at the poles and weaken with distance.
Section 2
Electric Currents Generate Magnetic Fields
When electricity flows through a wire, it produces magnetism. Coiling the wire around iron creates an electromagnet whose strength increases with more coils, more current, or adding iron.
Section 3
Generators Convert Motion Into Electricity
When a coil of wire moves through a magnetic field, electrons are pushed through the wire, creating electric current. This principle allows generators to transform mechanical energy into electrical energy.
Section 4
Magnets Push Objects Without Touching
Magnetic levitation occurs when repelling magnetic forces counteract gravity. This allows objects to float above magnets, enabling maglev trains to hover above tracks without friction.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter