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: In one opera by this composer set in Stockholm, the fortune-teller Ulrica prophesizes that Riccardo will be killed by the next man who shakes his hand. This composer of A Masked Ball included "Va, pensiero," or the Chorus of the Hebrew Slaves, in an opera which details the exile of the Jews from Babylon, Nabucco. In addition to the drinking song "Libiamo ne' lieti calici" in an opera about Alfredo and Violetta, this composer wrote an opera which sees the Duke of Mantua sing "La donna e mobile" and another opera about an Egyptian princess. For 10 points, name this Italian composer of Rigoletto, La traviata, and Aida.

SOLUTION: Fine Arts

PROBLEM: Bloodstone, agate, and onyx are chalcedonic varieties of this mineral. Other color variations arise from substituting atoms for silicon; iron for citrine and amethysts, titanium for the rose variety. When cemented it makes sandstone and when fused, silica glass. For ten points, identify this mineral composed of crystalline silicon dioxide.

SOLUTION: Science

PROBLEM: One law named for this scientist is due to the conservation of angular momentum, and states that a line drawn from a planet to the center of its orbit will sweep out equal areas in equal times. This writer of Astronomia nova and Mysterium cosmographicum analyzed data collected by (*) Tycho Brahe [TEE-koh BRAH] to develop that statement as well as to determine that planets' orbits are ellipses. For 10 points, name this German astronomer who published three laws of planetary motion.

SOLUTION:
Science