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![]() Standard MS-PS2-5 Magnetic Fields |
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Strength of Magnets |
Magnetism |
MS-PS2-5
Evidence Statement Conduct an investigation and evaluate the experimental design to provide evidence that fields exist between objects exerting forces on each other even though the objects are not in contact. |
MS-PS2-3
Evidence Statement Ask questions about data to determine the factors that affect the strength of electric and magnetic forces. |
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Vocabulary The Nature of Magnets Chapter 1, Section1 Pages 14-21 Investigating Electromagnetism - Worksheet Electromagnetism - Reading Essentials The Mystery Of Magnets (National Geographic) -Worksheets Edison - Worksheet Science Skills Handbook Appendix: Pages 202-214: Process Skills Packet |
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Essential Vocabulary & Concepts |
Picture | Core Knowledge or
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Magnets are materials that
attract iron. They can be made out of the elements iron, nickel, cobalt (and less often neodymium & samarium) Lodestones are rocks that contains the mineral magnetite. Materials with iron are called ferromagnetic. |
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Magnetic Poles are the
strong ends of a magnet. They always come in North and South pairs. Opposites (N+S) attract, Same (S+S or N+N) repel. The Earth's core is a giant iron magnet making Earth's magnetosphere. |
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Magnetic
Field is the area around a magnet Arrows are drawn from the North pole to the South pole. Where the lines are densest, the force is strongest, like at the poles. |
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Combining fields Filed Lines join together when opposite poles attract. Field lines push and do not join when similar poles repel. |
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A compass is a device that points along magnetic field lines towards the north and south poles of a magnet. |
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Magnetic fields are created by electrons
spinning in the same direction. |
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Magnetic domains are areas in
which the electrons spin in the same direction. The more electrons are
aligned, the stronger the field. You can make a magnetic domain by rubbing iron with one pole of a magnet to align electrons. You can mess up a magnetic domain by hitting or heating it. An electric current in a coiled wire can also align electrons, making an electromagnet |
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Scientist William Gilbert (1544-1603) wrote the book (6-volumes) called Die Magnete on electricity and magnetism setting the words used in the field ever-after. He described his own experiments and new ideas about Earth's magnetic field. |
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Technology Electric Motors use magnets and electromagnets to turn spinning sharft that can be used to make motion. |