The Fission Theory: This theory proposes that the Moon was once part of the Earth and somehow separated from the Earth early in the history of the solar system.
When you actually use that class to make a THING, this is what you make. A method is a bit of code that can be called when needed (often as part of an class, but not always) Here's an example: I write a class called Ball. In my main code, I then write a=Ball.new, b=Ball.new, c=Ball.new.
1 Class methods can access class variables and class methods directly. 2  Class methods cannot access instance variables or instance methods directlythey must use an object reference. 3  Also, class methods cannot use the this keyword as there is no instance for this to refer to.