九年级级下Unit3 The environment 教学 reading课件

1、The EnvironmentUnit 3 Reading Warming upWhat do the pictures tell us?Have a discussion: What will happen to the earth if we keep polluting it? How can we reduce pollution?Our earth is in danger!Whatis the greenhouse effect?A1 What do you know about the greenhouse effect? Match the first half of the

2、sentences in column A with the second half in column B. Write the correct letters in the blanks.There is an atmosphere. It controls However, we are polluting The gases cause the atmosphere The Earth is getting We call thisA the greenhouse effectB the Earth with harmful gasesC warmer and warmerD to k

3、eep in too much heat from the SunE around the EarthF the Earths temperatureABThe greenhouse effect 温室效应What can we do?Finish a test How green are you?1. Do you recycle A: newspapers? 1 B: tins? 1 C: plastic bags? 22. When you make a short journey, do you A: walk or cycle? 3 B: go by car? 0 C: go by

4、public transport? 13. What type of bags do you use for shopping? A: reusable ( e.g., basket ) 3 B: reused plastic 1 C: new plastic 04. How many pieces of electrical equipment are used in your kitchen?A: 10 or more 0B: 5 to 9 1C: below 5 25. Do you make sure that lights and other electrical equipment

5、 are switched off when not needed? A: nearly always 2 B: seldom 1 C: never 06. Do you use disposable chopsticks? A: often 0 B: seldom 1 C: never 27. Do you use paper tissues? A: often 0 B: seldom 1 C: never 28. Do you usually take? A: a bath 0 B: a shower 1Who is the greenest in your class?Look at t

6、he pictures, the title, the introduction and the sub-headings of the article on page35. Then answer the qustions below. Before you read The world is in dangerThe main problems we face.The greenhouse effect, cutting down forests and bad habits. A green consumer is someone who only buys products frien

7、dly to the environment. 1. What is the article mainly about? 2. What problems does the article discuss? 3. A consumer is someone who buys and uses things. Can you guess what a green consumer is?ReadingReading Tips在阅读每个段落时，要注意综合运用略读(skimming)与扫读(scanning)这两种方法。 略读(skimming)只看文章标题、下标题以及每个部分或者段落第一行, 关注

8、文章中反复出现的关键词。 略读时, 要用充足的时间读懂段落的第一句和第二句, 因为第一句往往是该段的主题句(topic sentence), 而第二句往往是对前句的延伸(extension)或进一步的解释(explanation)。通过略读把握文章大意 Now, skimming to get main ideas.Read the first paragraph and find out the main idea.Our world is in danger.Read the second paragraph and find out the main idea.The atmospher

9、e around Earth is important to all living things.Read the third paragraph and find out the main idea.Cutting down trees cause many problems.Read the third paragraph and find out the main idea.Bad habits cause pollution. Rubbish should be thrown away in right way or we should use recycling things.Rea

10、d the last paragraph and find out the main idea.Be green consumers and try to buy and use products friendly to the environment.The writer says that it is in danger.2. It is necessary for all living things.3. CO2 comes from burning them.4. This causes sea level to rise.5. It causes the surface of the

11、 soil to be easily destroyed by rain.6. Many of our habits cause this. the world The atmospherefuelsThe increasing temperatureCutting down treespollutionD2 Read the article again and circle the correct answers.1.Because of pollution, _. not enough sunlight is reaching Earthtoo much heat is leaving t

12、he Earth not enough CO2 is leaving the Earth2. If there are more trees, the amount of CO2 in the atmosphere will be _. greater lessc. the same3. We can help protect the environment if we_. change our bad habits become consumers buy more products4. The purpose of the article is to make _. people do m

13、ore to protect the environment more people become consumersc. People learn more about the environmentLanguage points1. 原句再现： It is like the glass of a greenhouse.它像温室的玻璃。be like= look like 像；什么样子如： 你妈妈长什么样子？-What is your mother like?=What does your mother look like?-My mother is a tall woman with sh

14、ort hair.like prep.像50年后的世界会是什么样子？-What will the world be/look like in 50 years? Our life will be more wonderful.2. 原句再现： This causes sea level to rise, and in the future may cause cities to disappear.这使得海平面上升，在未来会使得城市消失。如： 什么使得你犯了那个愚蠢的错误？-What causes you to make the silly mistake?cause sb to do sth

15、使某人做某事3. 原句再现： Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain.如： 做运动对我们的身体健康很重要。 exercise is important to our health. (do)Cutting down treesdestroys and causes为V-ing作主语，谓语动词用单数。Doing4. 原句再现： People

16、 often use things once and then throw them away, or leave them on the ground as litter.人们经常会把用了一次的东西扔掉，或者当垃圾丢弃在地上。throw them/it awaypick them/ it upthrow them away 中的them为代词，代替前面的things,不可以说throw away thempick up them/ itleave 意为遗留；落下x5. 原句再现： We should also recycle as many things as we can. 我们也应该尽我

17、们所能地多重复利用东西。如： 我们应该尽可能多的帮妈妈做家务。We should do we to help our mother.= We should do to help our mother.asas sb can=asas possible尽可能。的as much homework as canas much homework as possiblePhrases1. 在危险中2.保护环境3.温室效应4.生物5.像。6.阻止发生7. 和.一样8.引起。9.太多热量be in danger protect the environmentgreenhouse effectliving t

18、hingsbe likekeep/stopfrom doing sththe same ascause sb to do sthtoo much heat10.由于11. 砍伐12.破坏自然13. 使。更差14.吸收二氧化碳14.产生氧气15.造成；导致16.引起污染17.扔掉cut down destroy naturemake sth. Worsetake in= absorb CO2produce oxygenresult incause pollutionthrow awayas a result of =because of 18. 大量的19.为了20. 保护环境21.采取行动22. 和。不同23. 有利于环境的产品24. 尽我们可能多的25. 有作用；有影响mountains of=lot