The Difference Between Contemporary Paintings, Modern Art, & Abstract Paintings

So what's the difference?  This is a basic question,1940's in the abstract expressionism movement with
and a little confusing to answer because the termsJackson Pollock at the helm.  Because abstract art is
"contemporary," "modern," and "abstract" can be useda style of painting and not a classification of an art
interchangeably at times.  Let us start with "modernperiod, abstract paintings are still being created today.
art."  Modern art is a classification of an art periodAnd that brings us to right now.  Right now we use
that started around 1870 by Impressionists like Claudethe term "contemporary" to define artwork as being
Monet.  It is understood that modern artists are thosecreated in our lifetime or in the current present
who experimented with new ways of seeing,moment.   So any paintings being created right now
expressing new ideas and methods.  But technicallyare contemporary paintings no matter what the style. 
the modern art movement ended around the 1960'sWhat has happened is that people generally use
and 70's when the term "postmodern" started to be"contemporary art" to describe artwork from the
used and pop art became the new thing.1970's until now.  It is hard, if not near impossible to
Abstract art is a style of painting a departure fromdefine a period while we are living in it.  One might
reality and was definitely modern at the time. wonder, will we always use the word "contemporary"
Abstraction in paintings started to make the sceneto describe the artwork being created in the present
right around the same time modern art became knownmoment?  Or will there be an end to the use of the
because it is a painting style classified in the modernword "contemporary" signifying an end of another
art movement.  But full blown abstract paintings reallyartwork period very similarly to how "modern" was
started appearing early 1900's in Europe by the likes ofused.  I don't know.  But in any case, I hope this
Pablo Picasso and others in the cubism movement. information has helped and not confused you even
Abstract art really was not created in America until themore.