Some american real scientists have presented their job in the web site http://pbskids.org/dragonflytv/scientists/index.html
Try to find out which scientist is described by each student.
For the Spanish and French scientists, some quiz have been created in https://b.socrative.com/login/student/ .To answer the quiz, enter the room number (or key) which is given on the Spanish and French Padlets. You can discuss as well in the forum to guess the students'job.
Go and play !