Moovly - Create Animated Content like a Pro. TPACK in 3 Minutes. Map projection. More generally, the surfaces of planetary bodies can be mapped even if they are too irregular to be modeled well with a sphere or ellipsoid; see below. Even more generally, projections are the subject of several pure mathematical fields, including differential geometry and projective geometry. However "map projection" refers specifically to a cartographic projection.
Background[edit] Maps can be more useful than globes in many situations: they are more compact and easier to store; they readily accommodate an enormous range of scales; they are viewed easily on computer displays; they can facilitate measuring properties of the terrain being mapped; they can show larger portions of the Earth's surface at once; and they are cheaper to produce and transport.
These useful traits of maps motivate the development of map projections. However, Carl Friedrich Gauss's Theorema Egregium proved that a sphere's surface cannot be represented on a plane without distortion. Metric properties of maps[edit] Creative Commons. Scavenger hunt. A scavenger hunt is a party game in which the organizers prepare a list defining specific items, which the participants – individuals or teams – seek to gather all items on the list – usually without purchasing them – or perform tasks or take photographs of the items, as specified.[1] The goal is usually to be the first to complete the list, although in a variation on the game players can also be challenged to complete the tasks on the list in the most creative manner.
According to game scholar Markus Montola, scavenger hunts evolved from ancient folk games.[2] Gossip columnist Elsa Maxwell popularized scavenger hunts in the United States with a series of exclusive New York parties starting in the early 1930s.[3][4][5] The scavenger-hunt craze among New York's elite was satirized in the 1936 film My Man Godfrey, where one of the items socialite players are trying to collect is a homeless man.[6]
Textbook. A textbook or coursebook (UK English) is a manual of instruction in any branch of study. Textbooks are produced according to the demands of educational institutions. Schoolbooks are textbooks and other books used in schools.[1][2] Although most textbooks are only published in printed format, many are now available as online electronic books. History[edit] The ancient Greeks wrote texts intended for education. The modern textbook has its roots in the standardization made possible by the printing press. The Greek philosopher Socrates (469–399 B.C.) lamented the loss of knowledge because the media of transmission were changing.[3] Before the invention of the Greek alphabet 2,500 years ago, knowledge and stories were recited aloud, much like Homer's epic poems.
The next revolution for books came with the 15th-century invention of printing with changeable type. Compulsory education and the subsequent growth of schooling in Europe led to the printing of many standardized texts for children. 1. texto-refundido-lomce-loe. Spain_organisation_of_primary_education. La OCDE.