John Dalton
![Picture](/uploads/1/6/9/3/16936674/6119048.jpg?223)
Chemist-An expert in chemistry; a person engaged in chemical research or experiments.
Meteorologist-A specialist who studies processes in the earth's atmosphere that cause weather
conditions.
Physicist-An expert in or student of physics.
http://www.youtube.com/watch?v=sDoH5fPTOfo