Teaching objectives:

1, experience the process of data collection, collation, description and analysis, and further understand the role of statistics in real life and the close relationship between mathematics and life.

2. Knowing the composite bar graph, you can complete the simple composite bar graph. According to the composite bar chart, you can ask and answer simple questions, find information and analyze simple data.

3. Cultivate the ability of independent inquiry, group cooperation and discussion and communication with others.

Infiltration of social problems

By analyzing this composite histogram, we find that the total population of this county is increasing year by year. Population growth is a population problem. The population problem is a serious social problem, not only in China, but also in the world, which needs social attention.

Insert a short paragraph to show the world population problem. The world population is increasing at an alarming rate. 1950, the world population was only 2.5 billion, 1987 reached 5 billion, and it increased to 6 billion in just six years. In July this year, the United Nations released the latest world population report, and the global population reached 6.7 billion, which is equivalent to arranging the people in the world one by one and expelling them from the earth.

The rapid expansion of population means excessive consumption of the earth's resources and energy, destruction of the environment on which human beings depend, and threat to the earth's ecosystem. The earth is our home. When the earth's resources are exhausted, how will mankind settle down?

The family planning policy implemented in our country is to control population growth, but what we can do now is to protect our surrounding environment and save resources.