MAGNETISM EXAM SPRING 2011
An object that attracts certain metals, mainly iron.
An object that loses its magnetism after short time.
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.|
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
Are not attracted to any magnet.
Force that pushes like poles apart. Like poles repel (N+N) (S+S) To push or move away
The force around all magnets
The ends of the magnet, where the magnetic force is the strongest
Groups of atoms that line up to makes something magnetic
Force that pulls unlike poles together Opposite poles attract (N+S).
Property of matter where atoms in an object are aligned into domains
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|
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.
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
Streams of electrically charged particles flowing at high speeds from the sun; solar wind pushes against Earth's magnetic field and surrounds it.
Flickr Creative Commons Images
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- "Magnet" image
- "Temporary magnet" image
- "Aurora" image
- "A compass needle points north" image
- "Magnets (permanent)" image
- "Non-Permanent Magnets or Temporary also known as Ferromagnets" image
- "Non magnets" image
- "Magnetism" image
- "Magnets" image
- "Compass" image
- "Lodestone or magnetite" image
- "Magnetosphere" image
- "Solar wind" image
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