Question: Uranium is a naturally occurring element that can be found in low levels within all rock, soil, and water. Uranium is the 51st element in order of abundance in the Earth's crust. Uranium is also the highest-numbered element to be found naturally in significant quantities on Earth and is almost always found combined with other elements. Along with all elements having atomic weights higher than that of iron, it is only naturally formed in supernovae. The decay of uranium, thorium, and potassium-40 in the Earth's mantle is thought to be the main source of heat that keeps the outer core liquid and drives mantle convection, which in turn drives plate tectonics.
Is there an answer to this question: Along with potassium-40 and uranium, the decay of what element is a primary heat source driving plate tectonics?

Answer: thorium


Question: There do exist orbits within these empty regions where objects can survive for the age of the Solar System. These resonances occur when Neptune's orbital period is a precise fraction of that of the object, such as 1:2, or 3:4. If, say, an object orbits the Sun once for every two Neptune orbits, it will only complete half an orbit by the time Neptune returns to its original position. The most heavily populated resonance in the Kuiper belt, with over 200 known objects, is the 2:3 resonance. Objects in this resonance complete 2 orbits for every 3 of Neptune, and are known as plutinos because the largest of the known Kuiper belt objects, Pluto, is among them. Although Pluto crosses Neptune's orbit regularly, the 2:3 resonance ensures they can never collide. The 3:4, 3:5, 4:7 and 2:5 resonances are less populated.
Is there an answer to this question: What is the fraction of the most heavily populated resonance in the Kuiper belt? 

Answer: 2:3 resonance


Question: Tuberculosis is classified as one of the granulomatous inflammatory diseases. Macrophages, T lymphocytes, B lymphocytes, and fibroblasts aggregate to form granulomas, with lymphocytes surrounding the infected macrophages. When other macrophages attack the infected macrophage, they fuse together to form a giant multinucleated cell in the alveolar lumen. The granuloma may prevent dissemination of the mycobacteria and provide a local environment for interaction of cells of the immune system. However, more recent evidence suggests that the bacteria use the granulomas to avoid destruction by the host's immune system. Macrophages and dendritic cells in the granulomas are unable to present antigen to lymphocytes; thus the immune response is suppressed. Bacteria inside the granuloma can become dormant, resulting in latent infection. Another feature of the granulomas is the development of abnormal cell death (necrosis) in the center of tubercles. To the naked eye, this has the texture of soft, white cheese and is termed caseous necrosis.
Is there an answer to this question: What's the technical term for abnormal cell death?

Answer: necrosis


Question: In 1173 John's elder brothers, backed by Eleanor, rose in revolt against Henry in the short-lived rebellion of 1173 to 1174. Growing irritated with his subordinate position to Henry II and increasingly worried that John might be given additional lands and castles at his expense, Henry the Young King travelled to Paris and allied himself with Louis VII. Eleanor, irritated by her husband's persistent interference in Aquitaine, encouraged Richard and Geoffrey to join their brother Henry in Paris. Henry II triumphed over the coalition of his sons, but was generous to them in the peace settlement agreed at Montlouis. Henry the Young King was allowed to travel widely in Europe with his own household of knights, Richard was given Aquitaine back, and Geoffrey was allowed to return to Brittany; only Eleanor was imprisoned for her role in the revolt.
Is there an answer to this question: Who backed John's elder brothers?

Answer:
Eleanor