Two or more pure substances can be mixed together to form a mixture. An example of a mixture of two compounds is alcohol and water. An example of a mixture of elements and compounds is air. The major components of air are hydrogen, oxygen, nitrogen and carbon dioxide. The substances in a mixture can be separated physically via such methods as filtration or chromatography.
Enigma is a German musical project founded in 1990 by Romanian-German musician and producer Michael Cretu. Cretu had released several solo records, collaborated with various artists, and produced albums for his then wife, German pop singer Sandra, before he conceived the idea of a New Age, Worldbeat project.
A mystery is something that baffles our understanding and cannot be explained. The giant slabs of Stonehenge, remain a mystery to this day. The noun mystery comes from the Greek mysterion, meaning secret rite or doctrine.. A great synonym for secret is enigma. We use this word all the time to describe stuff we don't understand, from crop circles and UFOs to the origins of the universe and the workings of the human brain.