| Saving The Earth
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Teaching focus 1． Realize the damage caused to the world and figure out the reasons. 2． Find ways to stop the earth from being polluted by discussing in groups. Teaching process Step 1 Revision 1. Check note-making Earth: not enough rain, too many cattle, cutting down trees, strong winds Air: smoke from factories, power stations, cars, chemical rain, accidents at power stations and factories Water: waste from factories and cities. Step 2 Presentation 1． Look at the earth here on the screen, it used to be very beautiful, with beautiful seawater covering it. It supplies fresh air for human being and other animals. People enjoyed a happy life. But now the earth is being seriously polluted; the trees are being cut down; green hills are becoming less and less. The leaves are falling off the trees. Also, different smokes and fogs are polluting the air. Besides, waste water from factories and plants are dirtying the water, too. Lakes and rivers are no longer safe for fishes, what’s worse, the oceans are being polluted too! As a result people no longer enjoy a happy life as before. The earth is in danger! 2． Talk about the map on the textbook. Here is a map on the screen, now I’d like you to read through the text quickly and find the places on this map where the damage has happened.[S1—S5] [The map shows us the polluted areas, which locate in almost every part of the world. Therefore, it is an urgent task for us to save the earth.] Step 3 Fast Reading What else does the text tell us about pollution? Now let’s watch the video and then do some True or False questions: 1. Many parts of the world with large population and plenty of crops have become deserts. [T] 2. Land may become poor if farmers do not limit the numbers of their cattle. [T] 3. Good soil is gradually lost these days as trees are being cut down. [T] 4. Air pollution and water pollution are the two causes of the problem that many parts of the world have become deserts. [F] 5. Chemicals in the smoke from power stations can travel hundreds of miles in the wind before falling down to the ground in the rain. [F] 6. After a bad accident at a nuclear power station, 50% of the trees in Germany were damaged. [F] 7. The writer uses the examples of the accidents in both India and Russian to explain how water is polluted. [F] 8. Once oceans are polluted, they are not able to clean themselves. [F] Step 4 Careful Reading Next please read the three passages a second time and try to get some detailed information, then you are required to Phenomena Causes Suggestions EARTH The area of desert is growing every year. Cattle eat grass. Limit the number of the cattle. Good soil is gradually lost. Trees being cut down; strong winds blowing the valuable soil away. Plant more trees and try to protect them. AIR Air is being polluted. Factories, power stations and cars produce a lot of waste. A lot of things have to be done to reduce pollution. New laws should be passed and people should realize how serious the problem is. A lot of people died from polluted air in both Russia and India. There were serious accidents that polluted the air. Trees in the forest are destroyed and fish in the lakes are killed. Chemical rain. WATER In some places it’s no longer safe for swimming, nor is it safe to eat the fish. Factories and cities produce a lot of waste. Same as above. Lake Baikal, which used to be cleanest I the world, s now polluted. Waste produced from a chemical factory. 2.to summarize the passages to get the main idea of each passage. Earth: The area of desert is growing and good soil is gradually lost. Air: Chemicals in the smoke cause a lot of damage and serious accidents took place from time to time. Water: Water pollution is caused by man’s waste. The waters of this great lake have been dirtied and 4800 square km of ocean were polluted by oil. Step 5 Discussion So far we have all learnt that the earth is being polluted. We must save it. Now let’s have a discussion about different kinds of pollution and different ways to solve these problems. (1)What kind of pollution can you think of? (2)Why trees are important? (3)What are the causes of water pollution? (4) What can be done to stop land from becoming into desert? (5) What else do we know about the problems that the earth is facing? (6) What steps should we take to save the earth? Who would like to share your ideas with us? Anyone wants to have a try? [A lot of damage has already been done to the earth, including pollution, nuclear waste, radiation and so on. We are also aware that there is only one earth for us. So the idea that everyone should keep in his or her mind is stopping any damage to the world and saving the earth.] Step 6 Practice and consolidation Now you are a reporter working for China Daily. When you making a social survey in your hometown, you see some factories in your hometown are seriously polluting the air and the water. The environment is not well protected. You are going to interview a manager of a paper factory, and write a report about what you see. You are supposed to tell the importance of stopping the pollution and protecting the environment. Now do the interview first in pairs and then make an oral report. [Present pictures] Step 7 Assignment (1)Read the additional materials about pollution and do the comprehension exercises. (2)Finish the report. |
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