必修2一二章考试必背（Compulsory 2, one or two chapters, examination must be back）.docVIP

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必修2一二章考试必背（Compulsory 2, one or two chapters, examination must be back）.doc

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必修2一二章考试必背（Compulsory 2, one or two chapters, examination must be back）

必修2一二章考试必背（Compulsory 2, one or two chapters, examination must be back） Senior one, geography compulsory 2 Demographic changes Section 1 changes in population size In 1 and October 31, 2011, the world population reached 7 billion 2, the natural growth of a regions population is determined by birth rates and death rates 3, the changing trend of the world population is increasing 4, before the agricultural revolution, people were mainly engaged in hunting and collecting industry. The population and population growth was generally characterized by a small population and a slow population growth 5, during the agricultural revolution, the number of people increased and the rate of growth accelerated, because of the development of farming and irrigation techniques, the stable food supply and the decline in mortality 6, since the industrial revolution began in the second half of the eighteenth Century, the number of people in the world continues to increase, and the rate of increase is more rapid, because of the development of science and technology and the improvement of human nature The fundamental reason, 7 of the worlds population growth is the production of tools and the progress of human society, human development and utilization of the natural environment and the transformation of the expanding the scope of all kinds of disasters and disease prevention capabilities continue to improve, so that human beings use and adaptability to the natural environment is growing, the world population growth to hitherto unknown speed 8, the number of new population will depend on the population base and the natural growth rate of the population 9, the worlds most populous continent is Asia, the continent with the fastest growing population is Africa, and the continent with the slowest population growth is Europe 10, the natural population growth rate of developed countries has maintained at a low level, growth is slow, and some countries have experienced negative growth, such as Ge