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.
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Question: Melamine resin is formed by dehydration of this compound, while barbiturates can also be formed by addition of this compound to malonic acid. Other uses of this compound include separation of racemic mixtures. Originally produced by a reaction between silver cyanate with ammonium chloride, it is now made in indusrial quantities by heating carbon dioxide with ammonia. When arginine is split, it forms an ornithine molecule and a molecule of this; the principal end product of mammalian nitrogen metabolism. First isolated by H.M. Rouelle, FTP, name the compound used to disprove the theory of vitalism when, in 1828 Friedrich Wohler, first synthesized it from inorganic materials.

Answer: Science


Question: One work of his, the colossal Saint John the Evangelist currently resides in the Duomo of Florence, but from its creation until 1588, it occupied a place in the faade of the Baptistery, a building which this artist's mentor, Lorenzo Ghiberti, had designed. Following his work on Saint John, he worked on a statue of St. Mark for the Orsanmichele church, where he would also create a statue of Saint George several years later. While working on the sculpture Habbakuk, or Zuccone, he is alleged to have repeatedly muttered "Speak, Damn you, Speak" at the marble he was working with. For ten points, identify this 15th-century artist and sculptor of the Equestrian Monument of Gattamelata and the Bronze David.  

Answer: Fine Arts


Question: Spin foam serves as a model for 4-geometries used to dynamically observe the quantum form of this force. Mossbauer spectroscopy of an iron-57 gamma emitter was used to measure Doppler redshift associated with this force in the Pound-Rebka experiment, and two lead balls were used to construct a torsion balance to measure the magnitude of this force in the Cavendish experiment. Conceptualized by wells in spacetime, for 10 points, identify this weakest fundamental force that causes objects in the air to accelerate to Earth at 9.8 meters per second squared.

Answer:
Science