A mineral, by definition, is. . . 1  Inorganic, which means that it is not made by a living organism. 2  A solid. 3  Has a regular crystal structure. 4  Made by nature which means minerals are not made, directly or indirectly, from human activity. 5  Has a predictable chemical formula. A solid. 2  There is one unusual exception. 3  Native mercury is a mineral and is the only metal that is a liquid at normal temperatures. 4  Has a regular crystal structure.
Image:Cultural Heritage Agency of the Netherlands 20309407 - RCE. An A-frame house is an architectural house style featuring steeply-angled sides (roofline) that usually begin at or near the foundation line, and meet at the top in the shape of the letter A. An A-frame ceiling can be open to the top rafters.
Best Answer: Modern architecture is a set of building styles with similar characteristics, primarily the simplification of form and the elimination of ornament. The first variants were conceived early in the 20th century. Modern architecture was adopted by many influential architects and architectural educators, however very few Modern buildings were built in the first half of the century.