英语九年级下册（2014秋审查）Unit 3 The environment教学ppt课件

这是一份英语九年级下册（2014秋审查）Unit 3 The environment教学ppt课件，共44页。PPT课件主要包含了 Reading ，Warming up，Reading等内容，欢迎下载使用。
The Envirnment
What d the pictures tell us?Have a discussin: What will happen t the earth if we keep plluting it? Hw can we reduce pllutin?
Our earth is in danger!
A1 What d yu knw abut the greenhuse effect? Match the first half f the sentences in clumn A with the secnd half in clumn B. Write the crrect letters in the blanks.
There is an atmsphere. It cntrls Hwever, we are plluting The gases cause the atmsphere The Earth is getting We call this
A the greenhuse effectB the Earth with harmful gasesC warmer and warmerD t keep in t much heat frm the SunE arund the EarthF the Earth’s temperature
The greenhuse effect 温室效应
What can we d?
Finish a test
Hw green are yu?
1. D yu recycle A: newspapers? 1’ B: tins? 1’ C: plastic bags? 2’2. When yu make a shrt jurney, d yu A: walk r cycle? 3’ B: g by car? 0’ C: g by public transprt? 1’
3. What type f bags d yu use fr shpping? A: reusable ( e.g., basket ) 3’ B: reused plastic 1’ C: new plastic 0’4. Hw many pieces f electrical equipment are used in yur kitchen?A: 10 r mre 0’B: 5 t 9 1’C: belw 5 2’
5. D yu make sure that lights and ther electrical equipment are switched ff when nt needed? A: nearly always 2’ B: seldm 1’ C: never 0’6. D yu use dispsable chpsticks? A: ften 0’ B: seldm 1’ C: never 2’
7. D yu use paper tissues? A: ften 0’ B: seldm 1’ C: never 2’8. D yu usually take? A: a bath 0’ B: a shwer 1’
Wh is the
in yur class?
Lk at the pictures, the title, the intrductin and the sub-headings f the article n page35. Then answer the qustins belw.
Befre yu read
The wrld is in danger
The main prblems we face.
The greenhuse effect, cutting dwn frests and bad habits.
A green cnsumer is smene wh nly buys prducts friendly t the envirnment.
1. What is the article mainly abut?
2. What prblems des the article discuss?
3. A cnsumer is smene wh buys and uses things. Can yu guess what a green cnsumer is?
Reading 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(tpic sentence), 而第二句往往是对前句的延伸(extensin)或进一步的解释(explanatin)。
Nw, skimming t get main ideas.
Read the first paragraph and find ut the main idea.
Our wrld is in danger.
Read the secnd paragraph and find ut the main idea.
The atmsphere arund Earth is imprtant t all living things.
Read the third paragraph and find ut the main idea.
Cutting dwn trees cause many prblems.
Bad habits cause pllutin. Rubbish shuld be thrwn away in right way r we shuld use recycling things.
Read the last paragraph and find ut the main idea.
Be green cnsumers and try t buy and use prducts friendly t the envirnment.
The writer says that it is in danger.2. It is necessary fr all living things.3. CO2 cmes frm burning them.4. This causes sea level t rise.5. It causes the surface f the sil t be easily destryed by rain.6. Many f ur habits cause this.
The atmsphere
The increasing temperature
Cutting dwn trees
D2 Read the article again and circle the crrect answers.
1.Because f pllutin, _______. nt enugh sunlight is reaching Eartht much heat is leaving the Earth nt enugh CO2 is leaving the Earth2. If there are mre trees, the amunt f CO2 in the atmsphere will be ______. greater lessc. the same
3. We can help prtect the envirnment if we_______. change ur bad habits becme cnsumers buy mre prducts4. The purpse f the article is t make ______. peple d mre t prtect the envirnment mre peple becme cnsumersc. Peple learn mre abut the envirnment
Language pints
1. 原句再现： It is like the glass f a greenhuse.它像温室的玻璃。
be like= lk like 像；什么样子
如： 你妈妈长什么样子？-What is yur mther like?=What des yur mther lk like?-My mther is a tall wman with shrt hair.
like prep.像
50年后的世界会是什么样子？-What will the wrld be/lk like in 50 years? – Our life will be mre wnderful.
2. 原句再现： This causes sea level t rise, and in the future may cause cities t 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 yu t make the silly mistake?
cause sb t d sth使某人做某事
3. 原句再现： Cutting dwn trees als destrys the hmes f the animals that live in ur frests, and causes the surface f the sil t be easily destryed by rain.
如： 做运动对我们的身体健康很重要。 exercise is imprtant t ur health. (d)
Cutting dwn trees…destrys… and causes为V-ing作主语，谓语动词用单数。
4. 原句再现： Peple ften use things nce and then thrw them away, r leave them n the grund 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。
thrw them/it awaypick them/ it up
thrw them away 中的them为代词，代替前面的things,不可以说thrw away them
pick up them/ it
leave 意为遗留；落下
5. 原句再现： We shuld als recycle as many things as we can. 我们也应该尽我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 shuld d we t help ur mther.= We shuld d t help ur mther.
as…as sb can=as…as pssible尽可能。。。的
as much hmewrk as can
as much hmewrk as pssible
1. 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 prtect the envirnmentgreenhuse effectliving thingsbe likekeep/stp…frm ding sththe same ascause sb t d stht much heat
10.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 dwn destry naturemake sth. Wrsetake in= absrb CO2prduce xygenresult incause pllutinthrw away
as a result f =because f
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
muntains f=lts f in rder tprtect the envirnmenttake actinbe different frmprducts friendly t the envirnmentas many things as we can make a difference
The writer gives an example f a bad habit that causes pllutin. Can yu name sme ther bad habits that cause pllutin?