An object that produces a magnetic field, which is a region in which other magnets feel an attractive or repulsive force
Permanent magnets
Materials that are inherently magnetic
Moving electrical currents
Also produce magnetic fields
Magnetic poles
North and South poles
Earth's magnetic field
Resembles that of a bar magnet, caused by the movement of molten iron and nickel ions in the Earth's outer core
Above certain temperatures (Curiepoint)
Permanent magnets lose their magnetism
The inner core does not contribute to the Earth's magnetic field as its temperature will be above the Curie point
Induced magnets
Non-magnetic objects that can become magnetic when placed in a magneticfield
Induced magnets
Fridge door
Sedimentary rock formation
1. Magnetic minerals within align with the Earth's magnetic field
2. Creates a record of the direction of the Earth's magnetic field at the time of deposition
Sedimentary rocks deposited at different time periods can have different magnetic field directions, evidencing the fact that the Earth's magnetic field has reverseda number of times in its history
Currently, the geographic north pole of the Earth is a magnetic south pole
what is the curie point?
the temperature point where an object loses its magnetism
