Article: The simplest way to gain information about brain anatomy is by visual inspection, but many more sophisticated techniques have been developed. Brain tissue in its natural state is too soft to work with, but it can be hardened by immersion in alcohol or other fixatives, and then sliced apart for examination of the interior. Visually, the interior of the brain consists of areas of so-called grey matter, with a dark color, separated by areas of white matter, with a lighter color. Further information can be gained by staining slices of brain tissue with a variety of chemicals that bring out areas where specific types of molecules are present in high concentrations. It is also possible to examine the microstructure of brain tissue using a microscope, and to trace the pattern of connections from one brain area to another.

Question: Brain tissue is naturally soft, but can be stiffened with what liquid?
Ans: alcohol

Article: While outer space provides the most rarefied example of a naturally occurring partial vacuum, the heavens were originally thought to be seamlessly filled by a rigid indestructible material called aether. Borrowing somewhat from the pneuma of Stoic physics, aether came to be regarded as the rarefied air from which it took its name, (see Aether (mythology)). Early theories of light posited a ubiquitous terrestrial and celestial medium through which light propagated. Additionally, the concept informed Isaac Newton's explanations of both refraction and of radiant heat. 19th century experiments into this luminiferous aether attempted to detect a minute drag on the Earth's orbit. While the Earth does, in fact, move through a relatively dense medium in comparison to that of interstellar space, the drag is so minuscule that it could not be detected. In 1912, astronomer Henry Pickering commented: "While the interstellar absorbing medium may be simply the ether, [it] is characteristic of a gas, and free gaseous molecules are certainly there".

Question: Why were experiments done on luminiferous aether in the 19 Century?
Ans: "While the interstellar absorbing medium may be simply the ether, [it] is characteris

Article: Adult contemporary music (AC) is a style of music, ranging from 1960s vocal and 1970s soft rock music to predominantly ballad-heavy music of the present day, with varying degrees of easy listening, pop, soul, rhythm and blues, quiet storm, and rock influence. Adult contemporary is rather a continuation of the easy listening and soft rock style that became popular in the 1960s and 1970s with some adjustments that reflect the evolution of pop/rock music.

Question: What does the acronym AC stand for?
Ans: Adult contemporary

Article: In Congregational and Presbyterian churches which profess a traditionally Calvinist or Reformed theology there are differing views regarding present-day continuation or cessation of the gifts (charismata) of the Spirit. Generally, however, Reformed charismatics distance themselves from renewal movements with tendencies which could be perceived as overemotional, such as Word of Faith, Toronto Blessing, Brownsville Revival and Lakeland Revival. Prominent Reformed charismatic denominations are the Sovereign Grace Churches and the Every Nation Churches in the USA, in Great Britain there is the Newfrontiers churches and movement, which leading figure is Terry Virgo.

Question: Name the renewal movements which could be considered overemotional.
Ans:
Word of Faith, Toronto Blessing, Brownsville Revival and Lakeland Revival