http://www.drlemon.com/Grammar/servsestar.html
http://www.spanishdict.com/answers/100040/ser-and-estar#.UJcrXG873fE
Also, please see the many posts listed under Related Questions.
I am curently using ser vs. estar. Can you tell me when I am suppposed to use these?
2 answers
ser is used for what you are all the time and estar is used for what you or something is right now, in the moment.