Hummanities 3991 Essay

2106 Words Sep 6th, 2013 9 Pages
Part 1
Why does confusion exist about the definition of a scientific theory? When we talk about science, many people hear the term “theory”. The definition of a scientific theory can become confusing since many people interpret the meaning differently. When a person uses the term “theory” in a sentence it is usually used in a non-scientific way. They assume that a theory is something assumed, but not proven. When the term “theory” is used in science, it means an explanation based on observation, experimentation, and reasoning. It has been tested and confirmed as a general principle to explain phenomena. A scientific theory must be based on careful examination of facts. “A theory is a hypothesis or set of hypotheses that has stood the
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A hand axe is hand held and contains a sharp edge. The hand axe was primarily used by prehistoric man during the Stone Age. Hand axes are found in Africa, Western Europe, Northern Asia and the Indian Peninsula. The use of these tools is estimated to date back to the lower Paleolithic and also the middle Paleolithic era. The hand axes ranged in sizes starting from a few inches long up to and over a foot long. The different types of sturdy stones recognized in these hand tools include quartz, flint, and coarse rocks. The most popular shapes of the hand axes were triangle, round, and also oval with a sharp boarder all around. Most were shaped to have an off center of gravity. The hand axes were produced by direct percussion with a stone hammer. Chipping bits off of the stone was necessary to form the desired shape and length. The older hand axes were distinguished by their thickness and a curved border. “An experienced flintknapper needs less than fifteen minutes to produce a good quality hand axe. A simple hand axe can be made from a beach pebble in less than three minutes” (Britannica). It is likely that the hand axe tool was used for chopping wood, butchering meat, skinning animal hide, cracking open nuts, chopping down tough root vegetables, and as defense mechanisms. “Even in the Stone Age he was a mechanic of marvellous skill, as any one of today may satisfy himself by attempting to duplicate such an implement as an arrow-head. And a barbarian who