Unit 4 Magnetism

Earth contains magnetic poles

• True

• False

The north pole of a compass needle points in the direction of the south geographic pole.

• True

• False

Lodestone is a name for a naturally occurring magnetic material that is also called _____.

• lead

• magnetism

• copper

• magnetite

The angular difference between true north and magnetic north is known as the angle of _____.

• polarity

• retribution

• declination

• magnetism

The north magnetic pole of a compass needle is attracted to the _____ magnetic pole of the earth.

• north

• south

• east

• west

What type of magnets do not require any power or force to maintain their field?

• electromagnets

• permanent magnets

• temporary magnets

• domain magnets

Man-made permanent magnets retain their magnetism _____ than natural magnets.

• less

• longer

The three substances that form natural magnets are _____.

• iron, boron, and cobalt

• copper, iron, and cobalt

• copper, nickel, and boron

• iron, nickel, and cobalt

Magnetism can be explained in terms of _____ spin patterns.

• electron

• neutron

• proton

• quark

The regions formed in the molecular structure of magnetic metals are sometimes called magnetic _____.

• quark

• spins

• domains

• atoms