Knowledge and skills objectives:
1, so that students can understand the types and basic characteristics of land resources in China.
2. Understand the reasons for the differences in the distribution of land resources in China.
3. Through reading and analyzing the map, combined with the previous knowledge of climate and topography, cultivate students' knowledge transfer ability and understand the mutual influence and interaction among various elements of the natural environment.
Emotion, attitude and values goals
Make students fully understand that "land is the foundation of the country", cultivate students' awareness of resource protection, and establish a resource concept of rational use of land, land conservation and farmland protection.
Teaching focus:
Composition characteristics and distribution characteristics of various land resources in China.
Teaching difficulties:
The allocation of land resources and the contradiction between man and land.
Teaching methods:
Change the traditional teaching mode, so that students can achieve three-dimensional goals in a more relaxed environment through cooperative inquiry.
Teaching aid preparation:
Multimedia Courseware Blank China Outline
Teaching process:
(Introduction of New Curriculum) "Food is the most important thing for the people" and "Food is in Guangdong"
(Pictured) Nostoc flagelliforme, farmers digging Nostoc flagelliforme, desertification and sandstorm.
(Teacher) It's all about eating. Some unreasonable behaviors of human beings have left our earth scarred. As a renewable resource, can land resources withstand the "torture" of human beings and continuously meet our continuous needs? In addition to the unreasonable behaviors just seen, what other behaviors are irrational use of land resources? Now let's learn about the present situation of land resources in China.
(Teacher) China is a country with a long history. Chinese sons and daughters have thrived on this land for generations, constantly developing and utilizing the land, and gradually forming different types of land.
(Picture display) Pictures of cultivated land, grassland, woodland and construction land (teachers explain different pictures to let students intuitively understand the different contributions of different types of land to us)
(Student activity 1) Get to know different land types.
(blackboard writing shows knowledge structure)
(Transition) Through the above study, we know that there are four types of land use and learn how to judge land use. Let's understand the characteristics of land resources in China.
(blackboard writing) Characteristics of land resources in China
(Teacher) For this problem, we adopt such a learning method: everyone evaluates the favorable and unfavorable conditions of China's land resources by reading materials and combining the contents of teaching materials.
(Courseware demonstration)
Material 1: China is a vast country with a land area of 9.6 million square kilometers, ranking third in the world.
(Teacher) From the material 1, what are the characteristics of land resources in China?
(Student) Land characteristics: The total amount of land resources is rich.
(Teacher) If you have the ability to control the land use in our country, which type of land do you want to occupy the largest proportion in the 9.6 million square kilometers of land? What is the approximate percentage? How to distribute other land? What is the reason for your assumption?
(Student activity 2) Group cooperation-"You are the owner of your site": Draw the scale blueprints of various land types in the fan chart and discuss the reasons for this distribution.
(Students show and explain) Allocate land according to what they have learned.
(Teacher) Guide students to discover that some land in China is difficult to use.
(Students) Understand the land that is difficult to use.
(The picture shows) Loki mountains, Gobi, deserts, glaciers and other hard-to-use land.
(Transition) What is the proportional structure of all kinds of land in China?
(Student Activity 3) Read Figure 3.7 and Figure 3.8 on page 67 of the textbook, continue to understand the characteristics of land in China, and complete the following exercises.
(Students practice)
1, as shown in the figure, China land type (single/full).
2. Do you think the proportion of all kinds of land is reasonable? . Show in, less, more, less.
(Students complete and summarize) China has complete land types; However, the proportion of various types of land use is unreasonable.
(Supplement to courseware display materials)
Material 2: The per capita arable land in China is less than that in the world 1/4.
Material 3: In 2009, the cultivated land area in China was only 65.438+0.8 billion mu. It accounts for about 7% of the total cultivated land in the world. In 2009, there were about 65.438+33.3 million people in China, accounting for 265.438+0% of the world population.
From these two paragraphs, we can see that the contradiction between our population and what kind of land is the most prominent.
(Student's answer) The contradiction between man and land is particularly prominent.
(Question) Through the analysis just now, what are the characteristics of land resources in China?
(Student's answer) Land features: complete types; The proportion of all kinds of land use is unreasonable; The per capita land possession is small.
(Transition) How are these different types of land resources distributed?
(Student Activity 4) Work in groups. Read Figure 3.9 on page 68, "Distribution of Main Land Use Types in China", to understand the land distribution in China.
(Learning style: cooperative learning in groups, and different students in each group are responsible for finding out the distribution of a land type. ) In the courseware, I provided four maps: topographic map of China, monsoon and non-monsoon areas of China, dry and wet areas of China, and land resource utilization types of China. For students to refer to when doing problems. ) Please complete the following questions:
Land type names are mainly distributed in the region.
Main topographic types of dry and wet areas in monsoon region or non-monsoon region
plough
woodland
lawn
wasteland
(Students answer and talk) Make corresponding courseware for the distribution of each land type, show its distribution, and make explanations and necessary supplements.
(Summary and Transition) Through the above analysis, we find that there are differences in the distribution of land resources between the east and the west: grasslands and hard-to-use land are concentrated in non-monsoon areas in the west; Cultivated land and woodland are mainly distributed in plains, low hills and mountains in the eastern monsoon region. The cultivated land in the monsoon region is also different from that in the north: paddy fields in the south and dry land in the north. So what's the difference between them? Show two pictures and let the students find the problem. )
(Question) From the analysis, what are the characteristics of land resources in China?
(Student's answer) Land characteristics: The land distribution is uneven.
(Question) What are the characteristics of the land summarized by the students just now that are beneficial to the economic development of China? What are the disadvantages to economic development?
(Student Activity 5) Evaluate the advantages and disadvantages of land resources in China.
(Summarize and display the electronic blackboard book)
(Transition) Although the present situation of land in China has so many factors that are not conducive to economic development. There are still many unreasonable phenomena in the process of land use, which have led to many land problems.
(Student Activity 6) Tell me what you know about unreasonable land use with pictures? What land problems have been caused?
(Picture shows and explains)
Deforestation and soil erosion
Desertification of overgrazing land
Economic activities indiscriminately occupy cultivated land.
(Supplement to courseware display materials)
Material 4: At present, the cultivated land area polluted by heavy metals such as cadmium, arsenic, chromium and lead in China is nearly 20 million hectares, accounting for about 1/5 of the total cultivated land area. Heavy metal pollution reduces China's grain production by 10 million tons every year. I'm afraid it will take 40 years, or even longer, before these polluted soils can be restored to their original state. ...
Material 5: According to statistics, the cultivated land area in China is195438+0 million mu. In 2009, the cultivated land decreased to 654.38+0.8 billion mu.
(Summary) The land problems in China include land pollution and the decrease of cultivated land.
There are so many problems that we should try to solve them.
(Students understand) China's relevant land laws and regulations and national policies.
National land policy: cherish and rationally use every inch of land and effectively protect cultivated land. National Land Day: June 25th.
(Students recite) National Land Policy
(Class summary) Through the study in this section, we realize that China's land resources have both favorable conditions and more unfavorable conditions. This requires every citizen to cherish and make rational use of every inch of land and effectively protect cultivated land. Especially the national land policy, students should keep it in mind and implement it in their future study and work!