[u]Magnetism[/u] is a force of attraction or repulsion by magnetic materials. Not all matter is attracted to a magnet. Items that are attracted to a magnet are the elements [u]iron, nickel[/u] (not the coin) [u]and cobalt[/u] and materials that contain them. This force can cause objects to move without even touching them. Magnets can be man-made or naturally occurring. Rubbing an iron nail in one direction with a magnet will magnetize the nail. Electric current flowing through a wire in a closed circuit creates a magnetic field. Wrapping that wire around an iron nail will create an [u]electromagnet[/u]. The mineral [u]lodestone[/u] is a natural magnet.



[u]Magnetic poles[/u] are the ends of a magnet. If you hang a bar magnet by a string one end will swing around to point north and the other will point south. We call the end that points north the "[u]north pole[/u]" (N) and the end that points south the "[u]south pole[/u]" (S).



[u]Attraction[/u] is when two objects pull toward each other. The north pole of a magnet is always attracted to the south pole of another magnet (opposites attract).



[u]Repulsion[/u] is when two objects push away from each other. Like poles of a magnet always repel each other. A north pole will always repel another north pole and a south pole will always repel another south pole.



The [u]use of magnets[/u] has an important role in our daily lives. They are used every day in can openers, telephones, stereo speakers, electric motors and magnets are even used to hold up pretty pictures on your refrigerator.



The [u]magnetic field[/u] is the region of magnetic force around a magnet. It is made up of magnetic lines of force. When iron filings are sprinkled around a magnet they will line up along the arcing magnetic lines of force. These lines of force begin at one pole and arc to the other. They are also closest together near the poles because the force is strongest there.



All magnets can lose their magnetism. Heating or dropping a magnet can disrupt the magnetic domains within the magnet causing it to demagnetize. Materials that are hard to magnetize tend to keep their magnetism longer than materials that are easier to magnetize. Steel is harder to magnetize than iron, so a magnet made of steel will last longer than one made of iron. Steel magnets are called permanent magnets.





[b]Which element will [u]not[/u] be attracted by a magnet?[/b]

[u]Magnetism[/u] is a force of attraction or repulsion by magnetic materials. Not all matter is attracted to a magnet. Items that are attracted to a magnet are the elements [u]iron, nickel[/u] (not the coin) [u]and cobalt[/u] and materials that contain them. This force can cause objects to move without even touching them. Magnets can be man-made or naturally occurring. Rubbing an iron nail in one direction with a magnet will magnetize the nail. Electric current flowing through a wire in a closed circuit creates a magnetic field. Wrapping that wire around an iron nail will create an [u]electromagnet[/u]. The mineral [u]lodestone[/u] is a natural magnet.



[u]Magnetic poles[/u] are the ends of a magnet. If you hang a bar magnet by a string one end will swing around to point north and the other will point south. We call the end that points north the "[u]north pole[/u]" (N) and the end that points south the "[u]south pole[/u]" (S).



[u]Attraction[/u] is when two objects pull toward each other. The north pole of a magnet is always attracted to the south pole of another magnet (opposites attract).



[u]Repulsion[/u] is when two objects push away from each other. Like poles of a magnet always repel each other. A north pole will always repel another north pole and a south pole will always repel another south pole.



The [u]use of magnets[/u] has an important role in our daily lives. They are used every day in can openers, telephones, stereo speakers, electric motors and magnets are even used to hold up pretty pictures on your refrigerator.



The [u]magnetic field[/u] is the region of magnetic force around a magnet. It is made up of magnetic lines of force. When iron filings are sprinkled around a magnet they will line up along the arcing magnetic lines of force. These lines of force begin at one pole and arc to the other. They are also closest together near the poles because the force is strongest there.



All magnets can lose their magnetism. Heating or dropping a magnet can disrupt the magnetic domains within the magnet causing it to demagnetize. Materials that are hard to magnetize tend to keep their magnetism longer than materials that are easier to magnetize. Steel is harder to magnetize than iron, so a magnet made of steel will last longer than one made of iron. Steel magnets are called permanent magnets.





[b]Electric current flowing through a wire in a closed circuit creates a-[/b]

[u]Magnetism[/u] is a force of attraction or repulsion by magnetic materials. Not all matter is attracted to a magnet. Items that are attracted to a magnet are the elements [u]iron, nickel[/u] (not the coin) [u]and cobalt[/u] and materials that contain them. This force can cause objects to move without even touching them. Magnets can be man-made or naturally occurring. Rubbing an iron nail in one direction with a magnet will magnetize the nail. Electric current flowing through a wire in a closed circuit creates a magnetic field. Wrapping that wire around an iron nail will create an [u]electromagnet[/u]. The mineral [u]lodestone[/u] is a natural magnet.



[u]Magnetic poles[/u] are the ends of a magnet. If you hang a bar magnet by a string one end will swing around to point north and the other will point south. We call the end that points north the "[u]north pole[/u]" (N) and the end that points south the "[u]south pole[/u]" (S).



[u]Attraction[/u] is when two objects pull toward each other. The north pole of a magnet is always attracted to the south pole of another magnet (opposites attract).



[u]Repulsion[/u] is when two objects push away from each other. Like poles of a magnet always repel each other. A north pole will always repel another north pole and a south pole will always repel another south pole.



The [u]use of magnets[/u] has an important role in our daily lives. They are used every day in can openers, telephones, stereo speakers, electric motors and magnets are even used to hold up pretty pictures on your refrigerator.



The [u]magnetic field[/u] is the region of magnetic force around a magnet. It is made up of magnetic lines of force. When iron filings are sprinkled around a magnet they will line up along the arcing magnetic lines of force. These lines of force begin at one pole and arc to the other. They are also closest together near the poles because the force is strongest there.



All magnets can lose their magnetism. Heating or dropping a magnet can disrupt the magnetic domains within the magnet causing it to demagnetize. Materials that are hard to magnetize tend to keep their magnetism longer than materials that are easier to magnetize. Steel is harder to magnetize than iron, so a magnet made of steel will last longer than one made of iron. Steel magnets are called permanent magnets.



[u] When two objects pull toward each other, it is called[/u]

[u]Magnetism[/u] is a force of attraction or repulsion by magnetic materials. Not all matter is attracted to a magnet. Items that are attracted to a magnet are the elements [u]iron, nickel[/u] (not the coin) [u]and cobalt[/u] and materials that contain them. This force can cause objects to move without even touching them. Magnets can be man-made or naturally occurring. Rubbing an iron nail in one direction with a magnet will magnetize the nail. Electric current flowing through a wire in a closed circuit creates a magnetic field. Wrapping that wire around an iron nail will create an [u]electromagnet[/u]. The mineral [u]lodestone[/u] is a natural magnet.



[u]Magnetic poles[/u] are the ends of a magnet. If you hang a bar magnet by a string one end will swing around to point north and the other will point south. We call the end that points north the "[u]north pole[/u]" (N) and the end that points south the "[u]south pole[/u]" (S).



[u]Attraction[/u] is when two objects pull toward each other. The north pole of a magnet is always attracted to the south pole of another magnet (opposites attract).



[u]Repulsion[/u] is when two objects push away from each other. Like poles of a magnet always repel each other. A north pole will always repel another north pole and a south pole will always repel another south pole.



The [u]use of magnets[/u] has an important role in our daily lives. They are used every day in can openers, telephones, stereo speakers, electric motors and magnets are even used to hold up pretty pictures on your refrigerator.



The [u]magnetic field[/u] is the region of magnetic force around a magnet. It is made up of magnetic lines of force. When iron filings are sprinkled around a magnet they will line up along the arcing magnetic lines of force. These lines of force begin at one pole and arc to the other. They are also closest together near the poles because the force is strongest there.



All magnets can lose their magnetism. Heating or dropping a magnet can disrupt the magnetic domains within the magnet causing it to demagnetize. Materials that are hard to magnetize tend to keep their magnetism longer than materials that are easier to magnetize. Steel is harder to magnetize than iron, so a magnet made of steel will last longer than one made of iron. Steel magnets are called permanent magnets.

[u]Magnetism[/u] is a force of attraction or repulsion by magnetic materials. Not all matter is attracted to a magnet. Items that are attracted to a magnet are the elements [u]iron, nickel[/u] (not the coin) [u]and cobalt[/u] and materials that contain them. This force can cause objects to move without even touching them. Magnets can be man-made or naturally occurring. Rubbing an iron nail in one direction with a magnet will magnetize the nail. Electric current flowing through a wire in a closed circuit creates a magnetic field. Wrapping that wire around an iron nail will create an [u]electromagnet[/u]. The mineral [u]lodestone[/u] is a natural magnet.



[u]Magnetic poles[/u] are the ends of a magnet. If you hang a bar magnet by a string one end will swing around to point north and the other will point south. We call the end that points north the "[u]north pole[/u]" (N) and the end that points south the "[u]south pole[/u]" (S).



[u]Attraction[/u] is when two objects pull toward each other. The north pole of a magnet is always attracted to the south pole of another magnet (opposites attract).



[u]Repulsion[/u] is when two objects push away from each other. Like poles of a magnet always repel each other. A north pole will always repel another north pole and a south pole will always repel another south pole.



The [u]use of magnets[/u] has an important role in our daily lives. They are used every day in can openers, telephones, stereo speakers, electric motors and magnets are even used to hold up pretty pictures on your refrigerator.



The [u]magnetic field[/u] is the region of magnetic force around a magnet. It is made up of magnetic lines of force. When iron filings are sprinkled around a magnet they will line up along the arcing magnetic lines of force. These lines of force begin at one pole and arc to the other. They are also closest together near the poles because the force is strongest there.



All magnets can lose their magnetism. Heating or dropping a magnet can disrupt the magnetic domains within the magnet causing it to demagnetize. Materials that are hard to magnetize tend to keep their magnetism longer than materials that are easier to magnetize. Steel is harder to magnetize than iron, so a magnet made of steel will last longer than one made of iron. Steel magnets are called permanent magnets.





[b] True or False. All magnets lose their magnetism?[/b]