揭阳第三中学教案表

课题 Book6 Unit4 Global Warming 课型 Warming up and reading 教学

2. Help the students learn how to give their ideas about the use of energy. 重点

难点 Enable the students to learn how to express agreement and disagreement.

Enable the students to express agreement and disagreement.　 教具

准备 A computer and blackboard 课时

安排 Two 教学过程与教学内容 教学方法、教学手段与学法、学情 Step 1: Greetings. Greet the students as usual.　　

Step 2: Warming up　　

1. Show the students some pictures. From the following pictures, they will know where all this energy comes from.

windmill a coal power station

　　an oil refinery a nuclear power plant

solar panels hydro-electric dam

2. Are the following resources renewable or non-renewable?

1)

2)

Step 3: Pre-reading

1. What is the greenhouse made and used for?

　　A greenhouse is made of glass and is used for growing plants, especially during cold weather.

2. How does it work?

　　The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.

3. What are the "greenhouse gases"?

In the atmosphere surrounding the earth there are gases called "greenhouse gases", including carbon dioxide, methane (甲烷, 沼气) and water vapor.

4. What do you think greenhouse gases do?

They trap the heat of the sun and keep the air surrounding the earth warm.

Step 4: Reading

1. Skimming: Glance quickly at the magazine article and answer the questions.

(1) Who wrote the magazine article? What is the name of the magazine?

(2) What are the names of the three scientists mentioned in the article?

(3) What do they think about global warming? Do they agree with one another?

(4) What are the two graphs about?

(5) What is the main topic of the article?

2. Careful reading

Task1: Read the article carefully. Are these statements true or false?

(2) The temperature in the last century did not seem to increase much. T

(2) Everyone believes that global warming is caused by the activities of humans. F

(3) Janice Foster believes that she can measure the future global rise in temperature. F

(4) The rise in carbon dioxide is causing a steady increase in global warming. T

(5) George Hambley believes that global warming will do good rather than harm to the earth. F

(6) It is clear what the effects of global warming will be. F

Task2: Fill in the blanks.

Scientists Opinions Dr. Janice Foster ◆ We need ______ like carbon dioxide, methane and water vapour, but if we add huge ___________ extra carbon dioxide to the atmosphere by burning fossil fuels, it will cause the ________________ to go up.

◆ Over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees Celsius.

◆ An increase of five degrees would be a ___________. George Hambley ◆ Believes that we shouldn't worry about __________ of carbon dioxide in the air.

◆ Predicts that any warming will be mild with few bad environmental ____________.

◆ ______ that more carbon dioxide is actually a ________ thing, which will make life for human beings better. Suggested answers:

gases quantities of global temperature catastrophe

high levels consequences States positive

Step5 Homework

1. Read the passage again and review the new words and expressions.

2. Finish "课时达标检测10"

Teaching methods:

Brainstorming, listening and group work.