人教版高一英语课件：unit16 Period 3.ppt

period 3 task1. go over the text “ franklins famous kite experiment ” 一.useful phrases in the text a number of experiments do an experiment fly high in the rainy sky get /become charged a great deal of be made of / from fix / fasten / tie to protect from take care that when i had realized that i could use a kite . 二 .explanation of some sentences 1. benjamin franklin conducted a number of experiments in _ he showed _ electricity is . 2. here is _ he described one of his experiments. 3. having realized _ i could use a kite to attract lightening, i decided to do an experiment. ( ) which what how that _ the first thunderstorm came, i took my condenser to a shed in the field _ i could do my experiment. i was beginning to think _ the experiment would not work. others followed even before the whole string was wet, and i was able to collect and store a great deal of electricity in the condenser. the experiment proves that lightening and electricity are the same. when where that and ( ) task 2:word study read the text again and tick the sentences containing the words “charge,conduct,cross,sharp,tear and tie.” 1.in the eighteenth century, benjamin franklin conducted a number of experiments in which he showed what electricity is. 2.the string was getting charged. 3.most kites are made of paper, but a kite made of silk will not tear so soon in weather with rain and strong winds. 4.build the frame of the kite by making a small cross of two pieces of light wood. 5.third,tie a silk ribbon to string,just above the key. 6.fix a very sharp piece of metal to the top of the longer stick of the cross. task3.word formation: compounds are mainly nouns or adjectives that are made up of at least two parts. these parts can be other nouns, adjectives or prepositions. can you guess the following words? 1 .part1=part of the body used when we walk part 2=a round thing to play with part1+part2= answer: football 2.part1=something we put on our feet part 2=a thing piece of rope part1+part2= answer: shoestring 3.part1=water of ten degrees below zero part 2=a medicine to put on your skin part1+part2= answer: ice cream 4 .part1=the colour of most leaves in spring part 2=the place where the family live part1+part2= answer: greenhouse 5.part1=opposite of up part 2=a small city part1+part2= answer: downtown 6 .part1= smaller than the ocean part 2=all the things we eat part1+part2= answer: seafood 7.part1=something you do in your free time part 2=what is under your feet part1+part2= answer: playground 8 .part1= the way into a park or yard part 2=someone keeping or taking care of something part1+part2= answer: gatekeeper 9.part1=the opposite of white part 2=a flat and smooth piece of wood part1+part2= answer: blackboard 10 .part1= a piece of furniture with four legs part 2=a game played by hitting a small bal