What are they?
What is a magnet?
A magnet is a material that has its component atoms ordered so that the material has properties of magnetism, such as attracting or repelling other magnets.
What is magnetic field?
Magnetic field is is the region of magnetic influence around a magnetic pole.
Magnetic force between magnets is the attraction of unlike or like magnetic poles either causing them to repel or attract.
Magnet use 1
Magnets are used in MRI machines. There are superconducting magnet rings that work with the brain to gather pictures of that persons brain.
Magnet use 2
Magnetism is also used in nail polish. You apply the nail polish and then you use a magnet and move it around right above your wet fingernail and it makes patterns using magnetism.
Magnet use 3
Magnets are used in compasses that are in cars. The compass follows the poles of the earth.