Which excerpt from a lab report is more formal?

 - We did this experiment so we could try and figure out how things like temperature and wind end up affecting transpiration.
 - This experiment was conducted to show how variables such as temperature and wind affect transpiration.
The first excerpt from a lab report is more formal. It uses more elevated language (was conducted, different variables). The other excerpt uses imprecise and conversational language (try and figure out, things like, end up).