Table of Contents: 1  INTRODUCTION, DEFINITION & VALUE OF RESEARCH. 2  SCIENTIFIC METHOD OF RESEARCH & ITS SPECIAL FEATURES. 3  CLASSIFICATION OF RESEARCH:Goals of Exploratory Research. 4  THEORY AND RESEARCH:Concepts, Propositions, Role of Theory. 5  CONCEPTS:Concepts are an Abstraction of Reality, Sources of Concepts.
Lead poisoning is a serious and sometimes fatal condition. It occurs when lead builds up in the body. Lead is a highly toxic metal and a very strong poison. It is found in lead-based paints, including paint on the walls of old houses and toys.
Best Answer: lead is found in archeological digs dating over 5000 years ago which means that people knew how to refine it before the pyriamid in Egypt were built. IT was probably discovered by accident when people built it a very hot fire for cooking and it melted the lead that was in the rocks. The mineral that contains lead is galena is commonly found around the world.