牛津版 (深圳&广州)九年级下册Unit 3 The environment一等奖课件ppt

导入新课

Look and think:

Environmental problems in the world.

Greenhouse effect, water pollution, air pollution, excessive deforestation…

Do you know what causes the environmental problems?

What can we do to protect the environment?

Look at the pictures and discuss the question.

Stimulate interest and introduce new lesson.

新课讲授

Step1. Lead in

Look and think:

Environmental problems in the world.

Greenhouse effect, water pollution, air pollution, excessive deforestation…

Do you know what causes the environmental problems?

What can we do to protect the environment?

Step2. Words

Learn the new words in this unit and pay attention to the key words.

Step3. Pre-reading

What do you know about …?

What do you know about the greenhouse effect? Match the first half of the sentences in column A with the second half in column B. Write the correct letters in the blanks.

What is the result of the greenhouse effect? In groups, discuss this with your classmates.

Look at the pictures, the title, the introduction and the sub-headings of the article on page 35. Then answer the questions below.

Step4. While- reading

Listen and read the passage.

Step5. Language points

1.Our world is in danger.

 in danger 在危险中，濒危

e.g.

This kind of bird is in danger. We need to do something to protect them.

【拓展】

  out of danger 脱离危险

He is out of danger now.

他现在脱离危险了。

2.The atmosphere around the Earth is necessary for all living things.

sth. is necessary for sb/ sth 对于某人而言，某事、物是必须的。

【拓展】

It’s necessary for sb. to do  对于某人而言，干什么是必须的

e.g.  It’s necessary for us to go to school on time.

我们必须按时上学。

living things 生物，living adj. 活的，活着的

【辨析】living 和alive

两者都为形容词，living活的，活着的，即可作表语又可作定语，既可以用于指人也可以用于指物。而alive 活的 不用于名词前，只做表语。

e.g.

They are living and as happy as ever.

他们都还活着，并且跟以前一样快活。

Luckily, the boy is still alive.

幸运的是，那个男孩还活着。

3. As a result of the greenhouse effect, the Earth’s temperature is increasing.

as a result of 由于，作为……的结果，与because of 同义。

【辨析】

as a result of 和 as a result

as a result of 介词短语 由于……，后跟名词、代词等

as a result   副词短语 结果，后跟事情的结果

e.g.

I was late  as a result of the heavy rain.

由于下大雨，我迟到了。

He got up late today. As a result , he missed the early bus.

他今天起晚了。结果，他错过了早班车。

increase  增长、增多、增加；此处是不及物动词

【拓展】

increase  by 增长了……，by后接百分数、倍数或增长的幅度;

increase to 增长到……， to后接具体的数字

.g.

They increase the price by 20％.

他们把价格提高了20%。

The population of our country has increased to            1.3 billion.

我国人口已增加到13亿。

4. If we just learn to live in new and different ways, we can make a difference.

make a difference 有作用，有影响，与众不同

e.g.

The easiest way to make a difference is not to throw rubbish away.

做出改变最简单的方法就是不要乱扔垃圾。

Step6. Vocabulary

C1 The words in italics explain the meanings of some words on page 35. Find these words to complete the sentences. Change their forms if necessary.

C2. Complete the conversation below with the words from the box. Change their forms if necessary.

Step7. Pair work

Discuss the questions below in groups and then report your result to the whole class.

What other bad habits do people have in their daily lives?

What should we do to help protect the environment?

Step8. Summary

Key words:

concern, result, increase, nature, proper

Key phrases: 

in danger, sth. Is necessary for sb./sth., living things, as a result of, as a result, increase by, increase to, make a difference

Step9. Exercise

根据句意和汉语提示完成句子。

1. There is growing ____________ (忧虑) that they may get ill.

2. The spaceship went up through the ____________ (大气层) and then into space successfully.

3. The ____________ (温度) is very high in summer. I often go swimming with my father.

4. The world will be under a shortage of __________（燃料） in the future.

5. I can’t __________（猜测）the meaning of the word.

单项选择

单项选择。

1. We can make a _________ to the environment by planting more trees.

A. different                                B. difference

C. differently                             D. differ

2. William will _________ a famous writer in the new film.

A. set off                                    B. act as

C. put out                                   D. light up

3. —Mum, it’s too cold outside. Would you please the little cat ________ ?

— OK. It’ll feel much warmer inside.

A. let; out                                   B. turn; on

C. turn; out                                 D. let; in

4. Ask your classmates __________ who you are describing.

A. to guess                               B. mean

C. guess                                   D. to mean

Step 10  Homework

1.Talk about environmental problems with your classmates. Check on the Internet or books to find the solutions.

2.Review and remember the words and phrases we’ve learnt in this lesson.

3.Read the passage again and learn more.

Look at the pictures and discuss the question.

Learn the new words in this unit.

Look at the picture and complete the tasks.

Look at the pictures and answer the questions.

Listen and read the passage.

Explain the text and learn the language points in the text.

Complete the exercise.

Pair discussion and sharing.

Summarize the key words and phrases in this lesson.

Complete the exercise.

Complete the homework.

Stimulate interest and introduce new lesson.

Let the students know the words in this unit.

Let the students learn something about greenhouse effect.

Let students  predict the content of the article.

Let students learn the content of  the passage.

Explain the  language points in the text to lay the foundation for further study.

Learn more about the words and phrases through practice.

Learn more about environmental problems.

Consolidate the key words and phrases in the passage.

Consolidate the knowledge after class.

Consolidate the knowledge after class.

课堂小结

In this class, we learned the passage of The world is in danger, got the main idea of the passage, and learned the environmental problems, and the causes of the environmental problems, learned some new words and phrases, improved reading efficiency and accuracy.

Summarize the key points of this lesson.

Let the students master the content of this lesson more systematically.

板书

Module 2  Environmental problems

Unit3 The environment

Period 1 Reading I

Key words:

concern, result, increase, nature, proper

Key phrases: 

in danger, sth. is necessary for sb./sth., living things, as a result of, as a result, increase by, increase to, make a difference

Visualize the key points of the lesson.