The Earth: Its Magnetic Field

Describes the general characteristics of the earth's magnetic field, how it is measured, its effects on earth, and the changing positions of the magnetic poles. Shows the instrument used and the methods of collecting and recording magnetic data in terms of declination, inclination, and intensity. Uses animation, models, and demonstrations with bar magnets, compasses, and other instruments to explain magnetic forces to support theoretical causes of the magnetic field, and to point out the relation of the Van Allen radiation belt to the magnetic field., Describes the general characteristics of the earth's magnetic field, how it is measured, its effects on earth, and the changing positions of the magnetic poles. Shows the instrument used and the methods of collecting and recording magnetic data in terms of declination, inclination, and intensity. Uses animation, models, and demonstrations with bar magnets, compasses, and other instruments to explain magnetic forces to support theoretical causes of the magnetic field, and to point out the relation of the Van Allen radiation belt to the magnetic field.