You will be given a definition of a task first, then some input of the task.
In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

In a paper promoting the TIP5P model of this compound, Mahoney and Jorgensen noted that incorporating terms for flexibility or polarizability does not improve accuracy in modeling its major density anomaly. One of the earliest five-site models of this substance is named for Ben-Naim and Stillinger, and four-site models of this substance place its center of negative charge on a dummy atom and began with the Bernal-Fowler model. Ether is guaranteed free of this compound, when bottled with three or four angstrom molecular sieves, and this compound is removed from reaction mixtures using magnesium and sodium sulfate. This compound reacts with Grignard reagents to give alkanes and forms an azeotrope that is commonly entrained using benzene with ethanol. Such computational models all must take into account its unusually strong hydrogen bonding, which drives up its boiling point to one hundred degrees Celsius. For 10 points, name this compound whose triple point defines the Kelvin scale.
Output:
Science