Closed School. Quest 1

What is hidden behind the walls of the Closed School? What secrets does it hold and why can they only be uncovered by solving ten riddles, each plunging into a different field of science?
Five students who have passed the selection for the elite school must figure this out. They are the best, yet they need to combine all their abilities to complete the most challenging scientific quest. They have only one hint at their disposal, and it only further complicates the matter…