Magnetic Force

Magnetic Force

Open Ended

The earth is called a "giant magnet". Why do you think this is true?

A magnet is a piece of metal that can attract other metallic things such as steel, nickel, and cobalt.

The name comes from magnetis lithos.

Lodestones or magnetites are natural magnets.

​

​Magnets

Magnets have two poles - the north pole, and the south pole.

Magnets attract other magnets and metals.

When opposite poles are pointed toward each other, they attract.

When same poles are pointed to each other, they repel.

​

​Magnets

The force that magnets exert is called magnetism.

Magnetism is caused by the magnetic field which is invisible.

The magnetic field is formed around the magnet.

​

Magnetism

Multiple Choice

Which one is NOT a natural magnet?

• electromagnet

• lodestone

• magnetite

Multiple Choice

What happens when the North poles of two magnets are pointed twards each other?

• they attract

• they repel

• they produce heat

Multiple Choice

What happens when the North and South poles of two magnets are pointed towards each other?

• they attract

• they repel

• they produce heat

Some materials are nonmagnetic like cloth and plastic.

Materials with iron, nickel, and cobalt can become magnets.

​

Magnetic Materials