Category 1
A pull between a north pole and a south pole is a magnet's _______.
Attraction
Magnets attract iron, nickel, cobalt, and ________.
Alnico
Molten iron and nickel in Earth's _______ create a magnetic field around Earth.
Outer Core
A ______ magnetic material keeps its magnetic field for long periods of time.
Hard
A _________ is a machine that produces an electric current.
Generator
A push between two north poles or two south poles is a magnet's _________.
Repulsion
Any material that a magnet attracts is a ________.
Magnetic Material
A compass needle's magnetic north pole points to Earth's magnetic ______ pole.
South
Removing a soft magnetic material from a magnetic field causes the domains to return to their random positions. This is an example of a _______ magnet.
A temporary magnet made with a current-carrying wire coil wrapped around a magnetic core is an _______.
Electromagnet
An attraction involves _____ _____ poles.
Two different
A _______ is a push or a pull a magnetic field applies to either a magnet or an electric current.
Magnetic Force
A _______ is a region in a magnetic material in which the magnetic fields of the atoms all point in the same direction.
Magnetic Domain
A _______ magnet is made when an object is placed in an extremely strong magnetic field and the domains align and lock in place.
Permanent
An electromagnet's _________ can be turned on and off.
Magnetic Field
A repulsion involves _______ _______ poles.
The same
A magnetic field and its force are stronger when they are ______ to the magnet.
Materials like _______ and plastic do not have atoms grouped in magnetic domains.
Aluminum
A compass needle will move when a nearby ______ is switched on.
Electric Current
The north and south poles of a magnet in an electromagnet can be reversed if the current is ______.
Reversed
A ______ is an object that attracts iron and other materials that have magnetic qualities.
Magnet
A compass needle is just a ________.
Bar Magnet
A _______ magnetic material quickly loses its magnetic field.
Soft
There is a relationship between electricity and magnetism--_________.
Electromagnetism
The strength of an electromagnet can also be controlled depending on the number of _______ in the coil.
Loops