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33 Cards in this Set
- Front
- Back
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What do the unlike magnetic poles do?
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Attract
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What happens when the magnet’s magnetic field lines are close together?
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It's magnetic field becomes stronger
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What particles make up an atom?
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Electrons, Neutrons, and Protons
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What happens to the iron contained in the domains when molten material hardens into the rock on the ocean
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They line up with the earth's magnetic field
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What will happen to the Earth’s magnetic declination when the magnetic poles move?
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it will change
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How can a magnet’s magnetism be destroyed?
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By heating it to a specific temperature, or by striking it hard
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What type of magnet would a steel washer be?
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Temporary
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What does the magnetic properties of a material depend upon?
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The material's atomic structure
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Why are most magnetic properties not magnetic?
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Because their magnetic domain is not going in the same direction
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What is a particle that carries a negative charge?
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Electron
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What are three properties of magnetic field lines?
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They loop from pole to pole, they never cross, and as the get farther from the magnet, the weaker they become.
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Where does one part of a freely swinging magnet point?
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North
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What is the force of attraction or repulsion of magnetic materials?
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magnetism
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What does a spinning electron produce?
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a magnetic field
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How can the Earth’s magnetic field make a magnet out of an iron bar?
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If the iron bar was left out lying in a north south direction, the earth's magnetic field could attract the domains in the bar strongly enough to cause them to line up in the same direction.
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What are the Northern Lights seen in the Northern Hemisphere?
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aurora
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What do streams of electrically charged particles flowing at high speeds from the sun make?
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solar wind
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Where is the magnetic pole in the Northern Hemisphere?
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Northern Canada
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What do magnetic field lines around a bar magnet do?
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spread out, and curve from north to south pole
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What are common ferromagnetic materials?
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iron, nickel, cobalt, gadolinium
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What are a cluster of billions of atoms that all have magnetic fields lines up in the same way known as?
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Magnetic domain
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What is the region around a magnet where the magnetic force is exerted?
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the magnetic field
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What happens if you break a magnet in half?
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the two pieces will become separate magnets, and both would have a north and south pole.
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What do magnetic poles that are alike do?
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repel
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Where is the magnetic effect of a magnet the strongest?
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at the magnetic poles
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What are the two regions of space above the Earth’s surface that contain electrons and protons traveling at high speeds?
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Van Allen Belts
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Where do charged particles from the solar wind come closest to Earth?
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The Magnetic poles
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What is the end of each magnet called?
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A magnetic pole
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Using the diagram on page 10, where is the magnetic force around the magnet the strongest? How can you tell?
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The magnetic pole, because that's always the strongest point.
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Using the diagrams on pages 10-11, which pair of magnets is arranged so that the like poles are placed near each other?
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The first pair (far left)
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Using the diagrams on pages 10-11, what is the curved line around the magnet called?
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The magnetic field line
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How was Christopher Columbus able to successfully follow a course west to the Americas without the help of an accurate map?
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He used a compass. A compass is a magnetized needle that spins freely. The poles of the needle aligns itself with the earths magnetic poles. The poles of the compass needle always point in the same direction, which is north. Since, the poles always point in the same direction, Columbus was able to use his compass to point his ship in a steady direction.
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How do a material’s electrons help determine if it is magnetic?
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Each electrons in an atom spins, a spinning electron produces a magnetic field, most atoms have electrons that spin in pairs, which spin in opposite directions, canceling each other out. A single electron spinning has strong magnetic properties
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