The Big One will be a great earthquake. An earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.he Big One will be a great earthquake. An earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.
  Magnetism is the force generated by any moving charged particle or charged particles. A magnetic field is the result of the motion of a charged particle or charged particles, and this field is generated in no other way. Any time a charged particle moves, it creates a magnetic field around its path of travel.
A mixture is made of little bits of each substance mixed together. A mixture can be separated by physical methods, a compound can not. For example A mixture of iron filings and sulfur can be separated by using a magnet to attract the iron.Iron is a magnetic material but sulfur is not.If a mixture of iron filings and sulfur is heated the iron reacts with the sulfur and the compound iron sulfide is formed. The compound iron sulfide is not a magnetic material and cannot be separated by using a magnet.or example A mixture of iron filings and sulfur can be separated by using a magnet to attract the iron. Iron is a magnetic material but sulfur is not. If a mixture of iron filings and sulfur is heated the iron reacts with the sulfur and the compound iron sulfide is formed.