instruction:
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.
question:
Seas of calcite predominate during times of low concentration of this element. The NIMS probe discovered that Ganymede has a sulfate of this element, which is also used to treat eclampsia. Its molten form is used to make metallic titanium in the Kroll process. The active site of rubisco contains a carbamylated lysine attached to an ion of this element. Its cationic form is used to stabilize the product of PCR, and it is also prevalent in certain reagents in a Schlenck equilibrium. It is found in Grignard reagents as well as coordinated to the porphyrin ring of chlorophyll. For 10 points, name this element with atomic number 12 and symbol Mg.
answer:
Science

question:
This person's early fusion work often featured guitarist John McLaughlin, who is the namesake of one of this musician's songs. McLaughlin is featured, along with pianists Chick Corea and Herbie Hancock, on this person's album In a Silent Way. This performer often worked with pianist and arranger Gil Evans, and they featured the second movement of Joaquin Rodrigo's composition Concierto de Aranjuez [ah-rahn-HWEZZ] on the album Sketches of Spain. Name this trumpeter who placed the songs "Blue in Green", "So What", and "Freddie Freeloader" on his album Kind of Blue.
answer:
Fine Arts

question:
This term refers to a knot which is defined in cylindrical polar coordinates by the equations "r equals 2 plus cosine of p theta over q", and "z equals sin of p theta over q", where p and q are relatively prime integers. The fundamental group of one of these objects is equal to the cartesian product of the integers with themselves. The Kolmogorov-Arnold-Moser theorem concerns quasiperiodic orbits described by trajectories moving on the surface of one of these objects, which can be viewed as the cartesian product of two circles. By the Heawood conjecture, 7 colors are needed to color this genus one surface, which can be obtained by gluing opposite edges of a rectangle together with no twists. For 10 points, identify this kind of three-dimensional surface with a single hole, whose name describes the shape of a donut.
answer:
Science