This was a girl working on an experiment with someone watching, it looked like it could have been a teacher.  It looked as if she was trying really hard not to mess up in front of her teacher. She was really focused and working hard to impress her teacher.  Once the girl is done with the experiment the teacher is going to giver her a grade and an explanation to why she got that grade.  The girl is a little tense while she is working under the pressure, but she has practiced many times before and she is ready.   
