Unit 2 Loving Our Planet Topic 2 All these problems are very serious.Section C

课件27张PPT。仁爱版 九年级(上)
Unit 2
Topic 2 Sectionc1. Learn some new words:
hole, rise, level
2. Learn to talk about the harm of pollution:
(1) Farmland has become desert, so more and more different sorts of animals and plants are disappearing. Teaching aims and demands(2) Many rivers and lakes are now dead.
(3) Too much harmful radiation now reaches the earth.
(4) It causes the level of the sea to rise and the climate of the earth to change.
3. Develop the students’ sense of environment protection. 芝麻开门 1.What’s the weather like today?
It’s…..
2.Beijing often has sandstorms in spring. What causes the bad weather?
ReviewCutting down too many trees. People say that the temperature of the earth is becoming higher and higher. And
It is rising all the time. As a result, the level of the sea is rising and the climate of the earth is changing.
Then farmers have not enough farmlands to grow crops.What other things can destroy our environment? Cars and buses can destroy our environment.Factories can …Throwing litter about …Burning coal, oil …1a. Read and understandCan you choose a suitable title for each paragraph from the phrases below?1a. Read and understand Traffic pollution Fewer trees Factory pollution
The ozone layer More carbon dioxide 1.____________.
2.____________.
3.____________.
4.____________.
5.____________.Find the answer.Fewer trees Traffic pollution Factory pollution The ozone layerMore carbon dioxide Ask and answer1. Have we changed our planet in many ways?
2. Are people have done good for the earth?
3. Why are more and more different sorts of animals and plants disappearing?
4. Are many rivers and lakes dead now?
5. Is ozone helpful to the earth? Why?
6. Has carbon dioxide in the air increased a lot? Read 1a and choose the best answers.
( )1. What does “our planet” mean here?
A. The sun. B. Mars. C. The earth D. The moon .Work aloneC( )2. How old is our planet?
A.It’s about 35 000 years old.
B. It’s less than 35 000 years old.
C. It’s about 4 600 million years old.
D. It’s more than 35 000 years old. C( )3.Which is not true?
Cars can pollute the air.
Factories can pollute the water.
Not all the things we have done are good for the earth.
The fewer trees , the better.D( )4. The word “it” circled in the passage refers to ________.
CO2 B. O3 C. O2 D. H2O
( ) 5. “Blanket” in the passage refers to ________.
Carbon dioxide around the earth.
The ozone layer in the sky
The forest around the world
Pollution all over the world.BA( )6. The level of the sea is rising because of _______.
Pollution B. few trees.
C. The greenhouse effect
D. Changes in the climate C( )7. What is the best title for the passage?
Environment Problems
Pollution on the Earth
Hope for the Future
The Greenhouse Effect
ADiscuss the meanings of the following expressions, and then write a short passage about how they affect the environment. 2.Written workO3 ______________________________.
CO2._____________________________.
The greenhouse effect ________________________________.指点迷津1.Some things we’ve done are very good for the earth while some are not good.
Be good for 对有益， 有好处。
Running is good for our health.
Be good at 擅长， I am good at English.
While , 而， 然而。表示对比， 相当于 but.
I like singing while he likes swimming.
2. As a result, many rivers and lakes are dead.
As a result 结果， 放在句首， 用逗号隔开。
He didn't work hard, as a result he failed his exam.
As a result, they saved 90% of the trees in the forest .3. the+比较级， the+比较级， 表示越来越怎么样。
The more , the better.
The more you say, the angrier you will be.课堂练习
1.The world is ____ with love and peace.
2.I can’t find my pen. Have you seen it _____ ?
fill , report, somewhere , protect, step用方框内所给单词的适当形式填空。filledanywhere3.It____________ that many kinds of animals are in danger of disappearing completely.
4.Don’t ________ on the grass or pick the flowers around us.
5.We should do our best ___________ the environment.
was reportedstepto protect
Project How many kinds of pollution are mentioned in the passage? How do they affect our environment? Read 1a again, then finish the form on the blackboard. HomeworkWrite an article about the pollution.