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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,Electricity,8B Chapter 4,A dangerous servant,8B Chapter 3,1.What do you think of electricity?,Why?,2.Electricity,gives power for,all kinds of electrical appliances.Can you name some of the electrical appliances we use in our lives?,(When we plug an appliance into the wall socket,we are using electricity produced by a generator.),electrical appliances,an air conditioner,a,blender,a CD player,a computer,a cooker,a hair,dryer,a lamp,a,kettle,electrical appliances,a heater,a fan,an,iron,a,microwave,an oven,a,printer,electrical appliances,a,recorder,a,refrigerator,a TV set,a,vacuum,cleaner,a video player,a washing,machine,a,mobile,phone,(a,fridge,),a robot,Where does a robots,energy,come from?,Its,energy,comes from electricity.,Where does our energy come from?,(,Energy,is the power that makes things work.),Perhaps without electricity our lives will not be interesting.Now let us talk about electricity.,What is it?,Electricity is the power which is produced by rubbing(friction),by a machine called a generator or by chemical means(e.g.a battery).,Can we see it?,No,its a kind of energy that we cannot see.,Its,invisible,.,Can we touch it?,No,we cant.,We may,get an electric shock,.Its dangerous.,Power stations,pylons,home,Do you know how electricity comes to us?,The pylons carry wires.,Wires,carry electricity.,Electricity comes into our flats,through,thin wires,and the thin wires,are connected to,thick wires.The thick wires,are called,cables,and they,are buried,underground.Cables,are connected to,power stations.Power stations make electricity.,Homework:,Go over the vocabulary items and recite them.,Listen to the recording of the article and read it aloud several times.,Finish Ex.C/D/E on page 46,47.,Electricity,8B Chapter 4,A dangerous servant,8B Chapter 3,Ex.Fill in the blanks with proper words:,wire energy cable shock,1.Young people have more,than old people.,2.Dont touch the,!Youll get an electric,.,3.When the workers were digging up the road,they cut the,and as a result,there was a,blackout,in the area.,a thread of metal,the power that makes things work,a thick,strong rope made of wire,a very strong force or blow,a period of darkness caused by a cut in the electricity supply,We can,change,electricity,into,energy that we can see,hear,or feel.,We can also,change,it,into,energy that move things.,light energy,sound energy,heat energy,movement energy,(movement-moving or being moved),Can you tell what kind(s)of energy do they produce?,Vocabulary,electricity,n.,electric,a.,电的，电动的，发电的,electric cables,电缆,an electric kettle,电壶,electric current,电流,electrical,a.,电的，电气科学的,electrical appliances,电器,an electrical engineer,电气工程师,electrician,n.,电工，电学家,If any of the electrical appliances or the wiring in your home is out of order,you need to find,an electrician,to repair them.,1)When did the story happen?,2)Benny didnt want to trick Daisy,did he?,3)Does Benny know what electricity is?,4)Why must we be careful with electricity?,5)How does electricity come into our homes?,6)What are the wires connected to?,7)What did Daisy buy for her brother?,8)Does Daisy know what electricity is?,9)How do batteries work?,10)What do you think of Benny and Daisy?,Read aloud the article and answer the following questions:,Complete the sentences:,1)Its,to touch the electricity with your hand.(danger),2)We can buy sugar in,.(pack),3)He had no,for why he was late.(explain),4)Water.has three,-solid,liquid and gas.(form),5)The thief,the treasure under the tree.(bury),6)In the old days,the rich usually asked,to do the housework for them.(serve),7)Tim works as a newspaper boy and he gets his pay from his boss,.(month),Homework:,II.Read and recite paragraphs 413.,III.Read and recite the words and expressions.,Electricity,8B Chapter 4,A dangerous servant,8B Chapter 3,Public transport,train,bus,underground,plane,maglev train,phrases,热能,/,电能,/,声能,动能,/,原子能,精力充沛的,不同形式的能量,一包信件,一盒,20,支香烟,终于,起先,埋电缆,在某种程度上,谨慎，小心,变成,欺骗，,heat energy/light energy/sound energy,movement energy/atomic energy,be energetic/be full of energy,different forms of energy,a packet of letters,a packet of 20 cigarettes,at last/in the end/finally,at first/at the beginning of,bury cables,in a way,be careful with/of,change into/turn into,trick somebody/play a trick(joke)on somebody,Fill in the blanks:,fool battery happiness danger polite real produce,The trees can protect themselves by,a chemical that makes their leaves taste nasty.,Im,sorry about my being late,sir.,What is,water or fire?,Would you like to get me some,?,Dont always do such,things.,He answered that question,yesterday.,Although they are poor,they are,.,join together,in the end,that cannot be seen,words that make sth.clear or say what sth.means,shapes or kinds,power that makes things work or makes people do things,put something or someone in the ground,a very wide smile,thick ropes of wire which electricity passes through,power that(comes through wires and)can make,heat,sound and light,and mov
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