- 産業: Education
- Number of terms: 12355
- Number of blossaries: 0
- Company Profile:
Founded in 1946, Palomar College is a public two-year community college in the city of San Marcos, located in north San Diego County, California. Palomar offers over 300 associate degree, certificate programs and is designated by the U.S. Department of Education as an Hispanic-Serving Institution ...
A transitional species between the australopithecines and Homo erectus. Homo habilis appeared by 2. 4 million years ago and continued until about 1. 6 million years ago. They lived in East and possibly South Africa.
Industry:Anthropology
A traditional land-clearing practice whereby trees and other dense vegetation are cut with axes or machetes and later burned. Ash from the burned vegetation provides fertilizer for agricultural crops that are planted among the remaining tree stumps. Since no other fertilizer is usually applied, fields are abandoned after a few years, when crop yields go down, and clearing occurs elsewhere. Traditional slash-and-burn farmers use simple, hand-held digging sticks instead of plows.
Industry:Anthropology
A tool making technique in which a brittle rock (e. G. , obsidian, flint, chert, and basalt) that will potentially be an artifact is struck with a heavy glancing blow from another dense rock (i.e., a hammerstone) in order to cause a flake to be removed. An artifact can be shaped by carefully and systematically directing the percussion blows with the hammerstone. Percussion flaking works when a sufficiently large shock wave is directed into the target rock so that the elastic limit of the material is exceeded. This causes one or more flakes to be broken off. See pressure flaking.
Industry:Anthropology
A tool making technique developed in the Upper Paleolithic as a further refinement in shaping brittle-flaking rock artifacts. After preliminary shaping by percussion flaking, they often finished a tool with pressure flaking. They used a hard pointed object, like the tip of a deer antler, to literally push off flakes in the final shaping and thinning process. This resulted in small, regular flake scars and much greater control in determining the shape of the final product. Pressure flaking was also used to retouch, or sharpen, sharp edges.
Industry:Anthropology
A tool made from a relatively large block of rock rather than from the flakes that are removed from it by percussion flaking in the manufacturing process. Most hand axes are core tools.
Industry:Anthropology
A time scale, or calendar, that can be used any place in the world since it has a finite beginning point from which any earlier or later event can be related exactly. All chronometric dates are given in terms of a universal time scale.
Industry:Anthropology
A threatening gesture, stare, pose, or display intended to intimidate others.
Industry:Anthropology
A thing, such as a word, that can represent something else that is not here and now. The meaning of a symbol is arbitrary and is given by those who use it. Human languages are systems of symbols.
Industry:Anthropology
A thing that is intentionally made according to a cultural pattern or inadvertently modified as a result of culturally patterned behavior. Artifacts are usually relatively portable objects such as projectile points, ceramic pots, and baskets.
Industry:Anthropology
A thin, roughly parallel-sided stone flake that is at least twice as long as it is wide. They were made out of brittle breaking materials such as flint , chert, and obsidian. Blade flakes were preforms for the manufacture of many different kinds of tools during the Upper Paleolithic--e.g., knives, hide scrapers, spear tips, drills, awls, and burins. See punch flaking.
Industry:Anthropology
