Magnetic Field

Earth's magnetic poles are in the same place as the geographic poles.

• True
• False

Magnetic field lines always cross.

• True
• False

The motion of liquid _______ in the Earth's core creates a magnetic field.

• Iron
• Magnesium

__________ is the angle between geographic north and the north to which a compass needle points.

• declination
• magnetic force

A compass behaves as it does because each needle acts as a(n) ___________.

• Magnet

• Guide

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.

• No, because they point from north to south (they're supposed to go the other way).

• Yes, because the North pole is on the left in all pictures.

• No, because the North pole is on the left in all pictures (it's supposed to be on the right).

The strongest part of a magnet is...

• the bars .

• the force field.

• the poles.

• the middle.

Ancient people discovered magnetic rocks called lodestone. What did they use them for?

• fires
• compasses
• sculptures
• weapons

In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?

• There will be no interaction.  The poles of magnets do not have an effect on one another.
• The two north poles will attract each other
• The two north poles will repel each other
• The two magnets will combine and become one magnet

Looking at the field lines in this picture, these two magnets are ________

• Attracting

• Repelling

• Attracting and Repelling

• Doing nothing