1、,Chapter 1 Trees,Period 2:Reading Pollution fighters,May 2020.01顾秀云,Revision:answer the following questions,What are the products of trees?Wood,rubber,paper and so on.What kind of pollution can trees fight?Air pollution,noise pollution and water pollution.Trees can provide pure,cool air.How canthey
2、do that?They take harmful gases from the air and release oxygen into the air.,Look and think,Look at the second picture on Page 3 and think about the relationship between trees and air conditioners.,1.Why does Dr.Ray say that Judy should thank trees for pure,cool air?,Because trees take harmful gase
3、s from the,air,and release oxygen into the air2.Why does Dr.Ray say that trees are natural air conditioners?Because they cool the air as well as clean it.,Find the numbers:,1.There are forty-sixstudents in Judysclass.2F.uOrntehaenrd tahhianlfkihnegctares of trees could produce enough oxygen to keep
4、Judys whole class alive and healthy for a whole year.Can trees talk with each other?3.Three trees can do the job of fifteen air conditioners running almost all day.,Look and think,and answer the,question:Why do some trees join their roots together underground?,Look at the thirdpicture oWn hPeagnein3
5、sects attack a tree,how does it protect itself?,1.When insects attack a tree,it can warn its neighbours.,2.They join their roots together and pass food and water to each other.,1.What does the last part of interview tell us?,Trees are in great danger.We must do something to make a difference.2.Whats
6、 the present situation of trees?Can you give more examples to show that people are destroying our best fighters against pollution?We cut downand burnmillions of trees every year,but we replace ahlamrodslyt naonnyeooffththeemm.,1.hectare,n.公顷,Vocabulary:,2.warn,v.警告,warning,n.警告n.自然,3.naturenatural,a
7、dj.自然的adj.天生的,a hectare=10,000 square metresof sth.warn sb.to do sth.not to do sth.a warning signkeep the balance of nature,4.air conditioner air-conditioned,n.空调adj.有空调的,natural resources 自然资源He is a natural swimmer.,Vocabulary:,helping us.,Thank you for8.know a lot,很了解,know nothing about,eat a lot
8、 吃很多 一无所知,5.AHeaass wweellllasaIs isBgo+ingVsAhopp不in仅g.而且(强调前者)nNoott oonnlylyheAbubt ualtsoaIlsaom gBoin+g sVhoBpping(.强调后者)aHsewiseglloin=g s,htooppoing.I am going shopping as well.,one another=each otherthankfor+n./doing sth.your help.,彼此;互相因感谢,9.protect,v.保护,protection,n.保护,protectiveadj.保护的,Vo
9、cabulary:,protectfrom/against doing保护免受伤害,chemical changes 化学变化,teach me chemistry,教我化学,adj.化学的,10.chemicalchemistry,n.化学,n.化学物质 dangerous chemicals 危险的化学品,municate communicationcommunicate with,v.交流;沟通n.交流;沟通和交流;沟通,12.be in danger,处于险境中,be out of danger,脱离险境,dangerous,adj.危险的,Vocabulary:,取代;替代,Tree
10、s are in great danger.Luckily,he is out of danger now.replace=take the place ofdestroy v.彻底毁灭,damage,adj.损伤,The town was destroyed by the war.Many houses were damaged by the heavy rain.,How can we protect trees?,We shouldWe shouldnt,Homework,Recite the phrases in the sheet.精练 Ex.2;中学生世界 Ex.2 Translation.,
