TASK DEFINITION: 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.
PROBLEM: The Fraunhofer lines of the Sun's electromagnetic spectrum contain a D-line, sometimes known as a ""doublet,"" produced by transitions in this element's family but traditionally named after this element. This metal is currently made using the Downs Cell. When it is used as a coolant in nuclear reactors, the radioactive 24 isotope of this element is formed. It produces a bright (*) yellow flame when heated. This is the second-lightest alkali metal after lithium. For 10 points, identify this metal whose chloride is table salt.

SOLUTION: Science

PROBLEM: Sections of this work discuss early Roman law and the Germanic wadium, while it begins with a quote from the Havamal, a portion of the Edda. This work extends the author's first work, a collaboration in which he analyzed analogous ideas in Hinduism and Judaism. Marilyn Strathern critiqued this book from a gender perspective, while Sahlins' article on the "The Spirit of [It]", claimed that its author may have misunderstood an idea called the hau, in which the souls of the people involved in the title ritual become intermingled. The author views the title concept as multivalentthat is, a situation where a single action stands for all of society, called a total prestation. Drawing from Malinowski's study of the kula ring and the institution of the potlatch, for 10 points, identify this sociological work about the titular exchange by Marcel Mauss.

SOLUTION: Social Science

PROBLEM: His efforts in opera were almost completely unsuccessful, chiefly due to the asinine libretti seen in efforts like Alfonso and Estrella, The Twin Brothers, and Fierribras. The inventor of the "Moments Musicaux", his chamber works include the Grand Duo Piano Sonata in C Major, a series of Impromptus, and Fantasy in F Major, but he is better known for works in another genre that include "Gretchen at the Spinning Wheel", "Hark, Hark, The Lark", and "The Doppelganger". FTP, name the prolific composer of lieder probably best known for his 8th symphony, which was left unfinished.

SOLUTION:
Fine Arts