MAGNETISM EXAM SPRING 2011

English	Photos
Magnet	An object that attracts certain metals, mainly iron.
Temporary magnet	An object that loses its magnetism after short time.
Aurora	A display of lights in the sky, near Earth's poles,Colored light produced by charged particles from the solar wind and from the magnetosphere that react with and excite the oxygen and nitrogen of Earth's upper atmosphere; usually seen in the sky near Earth's magnetic poles
A compass needle points north	What effect does Earth's magnetic field cause?
Like poles will repel each other; they will push away.	What happens when the same poles of 2 magnets are moved closer?
What causes a compass' needle to point north?	Earths Magnetic field
How do you tell which part of a bar magnet is south?	Use a compass; north points to the south part of the magnet.
Magnets (permanent)	A magnet that keeps its magnetism for a long time (store magnet).Repels other magnets with the same polarity. It attracts opposite poles. It only attracts some metals. A magnet always has an even number of poles.
Non-Permanent Magnets or Temporary also known as Ferromagnets	Objects that are attracted to magnets
Non magnets	Are not attracted to any magnet.
Repel (Repulsion)	Force that pushes like poles apart. Like poles repel (N+N) (S+S) To push or move away
Magnetic field	The force around all magnets
Magnetic poles	The ends of the magnet, where the magnetic force is the strongest
Domains	Groups of atoms that line up to makes something magnetic
Attract (Attraction)	Force that pulls unlike poles together Opposite poles attract (N+S).
Magnetism	Property of matter where atoms in an object are aligned into domains
Magnets	What attracts objects made of iron, cobalt, nickel and steel?
Temporary and Permanent Magnet	That are 2 types of magnets?
Lines of Force	Imaginary lines used to illustrate and describe the pattern of the magnetic field. The magnetic lines of force are assumed to emanate from the north pole of a magnet, pass through surrounding space, and enter the south pole. The lines of force then travel inside the magnet from the south pole to the north pole, thus completing a closed loop .Magnetic lines of force will never cross one another.
The poles	Where are magnets the strongest?
Magnets are attracted to	Iron and metals the contain iron
Compass	A navigational instrument that finds directions using Earth's magnetic field
Lodestone or magnetite	A naturally magnetic rock found at or near Earths surface.The Vikings used lodestone for navigation. By the end of the twelfth century, Europeans were using this simple compass to aid navigation. Archimedes of ancient Greece is reputed to have used powerful lodestones to pull the nails out of enemy ships thus sinking them. Loadstone can be a Synonym of Magnetite which has a chemical formula of Fe3O4.
Magnetosphere	A magnetic field surrounding the Earth (or a palnet), which deflects much of the solar wind so that only a small portion of it enters the atmosphere
Solar wind	Streams of electrically charged particles flowing at high speeds from the sun; solar wind pushes against Earth's magnetic field and surrounds it.