what is ubsystematic observation?

Answer 1

For unsystematic observation, see

http://www.jiskha.com/display.cgi?id=1224289302

http://www.google.com/search?client=safari&rls=en&q=unsystematic+observation&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.