高中英语 Unit4《Global Warming》学案4 新人教版选修6

Unit 4 Global warming

Reading

Learning goals

Target language

words and phrases:

energy, light(v.), heat(v.), renewable, non-renewable, run out, compare, phenomenon, graph, fuel, trap, data, climate, catastrophe, consequence, range, per, glance, compare to, come about, fierce debate, result in, build up, keep on

Ability goals

Enable the students to talk about different sources of energy.

Enable the students to read the text, understand what it is about and talk about the causes and effects of global warming.

Learning important & difficult points

Enable the students to get a better understanding of articles of this kind. Learning aids

A projector and a blackboard

Learning procedures

Step 1 Warming up

T：Now let’s look at a picture on the slide and answer the question below.

What is the greenhouse made and used for?

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

What’s greenhouse effect?

Step 2 Scanning

Read the text quickly and find the answer to the questions:

1. Who wrote the magazine article? What is the name of the magazine?

Sophie Armstrong, Earth Care.

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

Dr Janice Foster, Charles Keeling, George Hambley.

3. What do they think about global warming? Do they agree with one another? They don't agree with each other.

Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental

consequences.

Charles Keeling believes it is the burning of more and more fossil fuels that i s resulting in a big

increase in carbon dioxide.

The first graph shows the temperature increase of one degree Fahrenheit between 1860to 2000.

The second graph shows the carbon dioxide content in the atmosphere from 1957 t o 1977.

4. What are the two graphs about?

The first graph shows the temperature increase of one degree Fahrenheit between 1860to 2000. The second graph shows the carbon dioxide content in the atmosphe re from 1957 to 1977.

5. What is the main topic of the article?

Global warming/ the warming of the earth.

Step 3 Skimming

Read the passage carefully and judge whether the statements are true or false.

1. The temperature last century didn’t increase much.

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

3. Janice Foster believes that global warming is caused b the burning fossil fu els.

4. Natural gas is a greenhouse gas.

5. Carbon dioxide is a byproduct of burning fossil fuels.

6. People accept Charles Keeling’s data because he took accurate measurements.

7. Flooding could be one of the effects of future global warming.

8. George Hambley believes scientists are just guessing about the effects of gl obal

warming.

9. George Hambley is worried about the effects of carbon dioxide on plant growt

h.

10. It is clear what the effects of global warming will be.

Keys: True: 3, 5, 6, 7, and 8 False: 1, 2, 4, 9, 10

Step 4 Detailed reading

Read the text carefully and try to find out how many parts we can divide the text into and find out the main idea of each part.