Using LanguageⅠ优秀公开课教案

Reading

Knowledge and skills

1．To know the meanings of the following new words and phrases：

2．To learn about some facts and views about global warming. Process and methods

1．While doing Warming Up the teacher can lead in the topic of this unit by showing students some pictures or videos about sources of energy，making the students recall their own knowledge about energy. 2．During Pre－reading the teacher can go around the classroom and discuss the questions with several students.This discussion should be student－centered and lead them to the topic of global warming.The teacher should also ask the students to look at the graphs in the reading passage and try to find out the general idea of the text. Emotion，attitude and value

1．To make students realize the harm of global warming and the importance of environmental protection. 2．To develop students' sense of cooperative learning. 教学重、难点

1．To enable the students to learn about global warming and to develop their reading ability. 2．To enable the students to talk about what we should do to prevent global warming. 教学过程

Warming up

1．Warming up by reading and talking：

Read through the exercise with the class.Put students in groups of four to talk about what we use energy for，what are the sources of these energy and whether the sources are renewable or non－renewable. Suggested answer：The six photos are：windmills；a coal power station；an oil refinery；a nuclear power plant；solar panels；a hydro－electric dam. 2．Warming up by discussion：

Draw a form on the blackboard as follows：

Things that use Sources of Renewable/non－energy energy renewable

Let the students have a discussion and collect suggestions from students and write them under the appropriate heading.

Suggested answer：

Things that use energy lights heating

television

cassette player

video recorder

computer

fridge

stove

hairdryer

... Sources of energy coal oil

natural gas wind power

solar energy

nuclear energy

hydro－electric power

biomass energy

geothermal energy

tidal energy Renewable/non－renewable

non－renewable non－renewable non－renewable renewable renewable non－renewable renewable renewable renewable renewable

Pre－reading

1．Show a picture of a greenhouse to students and ask them what a greenhouse is made of and what its purpose is. Suggested answer：It's made of glass and plants can grow in it when it's cold outside.

Ask the students how it works. Suggested answer：The glass traps the heat from the sun，making the air warm so that plants grow better. 2．Ask students what they think “greenhouse gases” are and what they think greenhouse gases do.Look at the picture above and explain it to their partners. Suggested answer：Greenhouse gases perform the same function as the glass in a glasshouse：they trap the heat of the sun and keep the air surrounding the earth warm.This is called the greenhouse effect.)

Reading and comprehending

1．Fast reading Ask students to read the passage quickly so as to get the key words and general idea of each paragraph and answer the following questions：

(1)What is the main topic of the article? ________________________________________________________________________ (2)Who wrote the magazine article？What is the name of the magazine? ________________________________________________________________________ (3)What are the names of the three scientists mentioned in the article？Do they agree with one another? ________________________________________________________________________ Suggested answers：(1)Global warming/the warming of the earth.(2)Sophie Armstrong，Earth Care.

(3)Dr Janice Foster，Charles Keeling，George Hambley.They don't agree with each other. 2．Detailed reading (1)Read the passage carefully and judge whether the statements are true(T) or false(F)．

①Janice Foster believes that global warming is caused by the burning fossil fuels.(

) ②Natural gas is a greenhouse gas.(

) ③Carbon dioxide is a byproduct of burning fossil fuels.(

) ④People accept Charles Keeling's data because he took accurate measurements.(

) ⑤Flooding could be one of the effects of future global warming.(

) ⑥George Hambley believes scientists are just guessing about the effects of global warming.(

) ⑦George Hambley is worried about the effects of carbon dioxide on plant growth.(

) ⑧It is clear what the effects of global warming will be.(

) (Suggested answers：TFTTTTFF) 3．Structure analyzing

Ask students to read the text carefully and try to find out how many parts they can divide the text into and find out the main idea of each part. Part Main idea Part 1(Paragraph ______)

Part 2(Paragraphs ______ to ______)

Part 3(Paragraphs ______ to ______)

Part 4(Paragraph ______)

Suggested answer：

Part Main idea Part 1(Paragraph 1) To introduce a debate over the issue of global warming. Part 2(Paragraphs 2 to 5) To illustrate how global warming comes about. To list two different attitudes among scientists towards Part 3(Paragraph 6) global warming. It's up to readers to think and decide whether people Part 4(Paragraph 7) should do something about global warming or not. 4

Retelling

Ask students to talk about global warming in their own words.Give them some key words and expressions on the blackboard.Then let them try to retell the passage. 5

Homework

1．Learn the useful new words and expressions in this part by heart. 2．Try to find some data about global warming on the Internet，and show

your

class in the next period and talk about them. 6

Reflection after teaching

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