Cambridge International AS and A Level With CD-ROM for Windows and Mac
A magnet is a material that attracts certain metals. The invisible force of attraction is called ‘magnetism’. It is named after the magnetic rock called ‘lodestone’ or ‘magnetite’.
Humans can survive without food or water for a shot time, but no-one can take a break from breatihing. Breathing moves “fresh” air into, and S’stale” air out of, the body. The air that surrounds us may be invisible, but from the moment of birth it essentiL for life.