Magnetism and Earth's Magnetic Field

Front

What is a group of atoms whose magnetic poles are lined up in the same direction?

Back

Magnetic domains.

Front

What do magnetic field lines that are drawn closer to each other indicate?

Back

A greater magnetic force.

Front

What happens when you break a bar magnet into two pieces?

Back

You get two north poles and two south poles.

Front

What produces Earth's magnetic field?

Back

The Earth's iron core.

Front

What does each geomagnetic pole do to the opposite pole of the compass?

Back

Attracts the opposite pole and repels the like pole.

Front

What is the term for the area around a magnet where magnetic forces can be detected?

Back

Magnetic field.

Front

What are the lines that represent the direction and strength of a magnetic field called?

Back

Magnetic lines of force.

Front

What is the effect of increasing the strength of a magnet on its magnetic field?

Back

It increases the density of the magnetic field lines.

Front

What happens to the magnetic properties of a material when it is heated above its Curie temperature?

Back

It loses its magnetism.

Front

What is the term for materials that can be magnetized easily?

Back

Ferromagnetic materials.