The following query works perfectly fine and returns all of these fields but when i checked Account objects fields i could not find CreatedDate field there. What is the reason for that , is this field hidden or something ? 
SELECT  ID,
        Name,
        Industry,
        CreatedById,
        CreatedDate,
        LastMOdifiedByID
FROM    Account

The following query works perfectly fine and returns all of these fields but when i checked Account objects fields i could not find CreatedDate field there. What is the reason for that , is this field hidden or something ? 
SELECT  ID,
        Name,
        Industry,
        CreatedById,
        CreatedDate,
        LastMOdifiedByID
FROM    Account