高中英语 Exploring plantsWriting课件 新人教选修9.ppt

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1、Experiment reportsWriting2021/8/11 星期三1 Look at the pictures in Exercise 1 and guess the answers to the questions:What materials are being used in this experiment?What do you think the purpose of the experiment is?What order do you think the pictures should go in?Listening on P792021/8/11 星期三2Number

2、 the pictures in the order you hear about them.231542021/8/11 星期三3 Listen to the first part again and answer the questions.1.What is the purpose of the experiment?2.To find out three important conditions that seeds need in order to start growing.2021/8/11 星期三42.Are students going to do the experimen

3、t in groups or individually?In groups.3.Where are the materials that the students need to set up the experiment?On the bench.2021/8/11 星期三54.What materials do the students need to set up the experiment?Four dishes and four pieces of cloth,a dish of seeds,some tap water,some boiled water and some coo

4、king oil.2021/8/11 星期三6Third listening Listen to the first part again and complete the table of conditions that each dish of seeds was given.2021/8/11 星期三7 ConditionsDish ADish BDish CDish Dtap water,warm temperature,oxygentap water,cold temperature,oxygenno water,warm temperature,oxygenboiled water

5、,oil,warm temperature,no oxygen2021/8/11 星期三8Fourth listeningNow listen to the second part of the tape in which the class discusses the results of the experiment.Complete the table of results.2021/8/11 星期三9Did the seeds grow?Reasons why or why notDish ADish BYesBecause they had water,warmth and oxyg

6、en.NoBecause it was toocold.2021/8/11 星期三10Did the seeds grow?Reasons why or why notDish CDish DNoNoBecause they were watered with boiled water which has no oxygen.Also,they were covered with oil which prevented oxygen getting to the seeds.Because they didnt get any water.2021/8/11 星期三11 Listen to t

7、he second part of the tape again and discuss the question:What was the conclusion of the experiment?Seeds need warmth,water and oxygen to grow.2021/8/11 星期三12An experiment on plantsPart1:Listen to a teacher(TH)helping her class set up an experiment.TH:OK,everybody,this morning were going to do an ex

8、periment to find out three important conditions that seeds need in order to start growing.LISTENING TEXT2021/8/11 星期三13The materials are all on the bench.Choose someone from your group to go and get four dishes and four pieces of cloth,a dish of seeds,some tap water,some boiled water and some cookin

9、g oil.Look at the instructions on the board.Lets read through them.2021/8/11 星期三14One:Put the pieces of cloth on the dishes and spread the seeds on the cloth.Label the dishes A to D.Two:Take Dish A and wet the cloth with tap water and place it in a well-aired warm spot so by the window over there wo

10、uld be fine.Three:Take Dish B,wet it with tap water and put it in the fridge.2021/8/11 星期三15Four:Take Dish C and put it next to Dish A.Do not water it.Five:Take Dish D and water it with the boiled water.Then drop a small amount of oil onto the cloth and put it next to Dish C.Six:Leave them all for a

11、 few days.OK,now you can go ahead and set up the experiment.2021/8/11 星期三16Part 2:Listen to the class discussing the results of the experiment.Students include Andrew(A),Rosemary(R)and Sandy(S).TH:Right,lets talk about whats happened in our experiment.What are the results?Andrew?A:The seeds in Dish

12、A have started growing but none of the others have.2021/8/11 星期三17TH:Good.Why do you think the seeds in Dish B didnt grow?Rosemary?R:Because it was too cold?TH:Thats right.And what about Dish C?2021/8/11 星期三18R:The seeds didnt get any water so they couldnt grow.TH:Yes.Now,Dish D is interesting.The s

13、eeds got both water and warmth so why didnt they grow?Any ideas?Andrew?2021/8/11 星期三19A:Well,the seeds got boiled water.TH:So,whys that important?Anyone?Well,boiled water has no oxygen in it and seeds need oxygen to grow.And What about the oil?Sandy?S:Wouldnt the oil make sure that no Oxygen could g

14、et to the seeds?2021/8/11 星期三20TH:Excellent.Well done.So,whats our conclusion about three important conditions that a seed needs in order to start growing?S:That seeds need warmth,water and oxygen to grow.2021/8/11 星期三21TH:Very good.Now I want you all to write up the experiment in your science noteb

15、ook.2021/8/11 星期三22Writing taskWhen writing an experiment report,you can ask questions about:the position of the headings,what the headings are,their order:how the items in the“materials”section are presented (as a list);2021/8/11 星期三23 what the“procedure”tells you(the steps you carry out to set up

16、the experiment);the grammatical structures used for each section of the report.2021/8/11 星期三24Outline Materials:ABCDAim:To find out three important conditions that seeds need in order to start growing.1.four dishes2.four pieces of cloth2021/8/11 星期三254.some tap water3.some boiled water 5.a dish of s

17、eeds6.some cooking oil2021/8/11 星期三26Procedure:1.Put the pieces of cloth on the dishes.2.Spread the seeds on the cloth.Label the 3.dishes A to D.2.Take Dish A and wet the cloth with tap water and place it in a well-aired warm spotso by the window over there would be fine.3.Take Dish B,wet it with ta

18、p water and put it in the fridge.2021/8/11 星期三274.Take Dish C and put it next to Dish A.Do not water it.5.Take Dish D and water it with the boiled water.Then drop a small amount of oil onto the seeds and put it next to Dish C.6.Leave them all for a few days.2021/8/11 星期三28ResultsDish A:Dish B:Dish C

19、:Dish D:ConclusionSeeds need warmth,water and oxygen to grow.The seeds grew.The seeds didnt grow.The seeds didnt grow.The seeds didnt grow.2021/8/11 星期三29Sample report:I did the experiment to find out three important conditions that seeds need in order to start growing.First,I put the four pieces of

20、 cloth on each dish,spread the seeds on the cloth and label the dishes A to D.2021/8/11 星期三30Then I placed Dish A in a well-aired warm spot by the window,took Dish B and wet it with tap water and put it in the fridge,took Dish C and put it next to Dish A without watering it.2021/8/11 星期三31Finally I

21、watered Dish D with the boiled water,dropped a small amount of cooking oil onto the seeds and put it next to Dish C.A few days later,I found that only Dish A grew.So I drew a conclusion that seeds need warmth,water and oxygen to grow.2021/8/11 星期三32Discussion:Look at the pictures of a plant experime

22、nt.The pictures are in the correct order.Discuss with partners about the processes the plants go through.Report each picture one by one:2021/8/11 星期三33Plant three beans in a pot,water them and leave them in a warm,light spot.2021/8/11 星期三34Two small shoots appear.2021/8/11 星期三35Cut the ends off a pl

23、astic bottle.2021/8/11 星期三36Wrap the bottle in dark paper.2021/8/11 星期三37Lay the bottle on its side in the pot and put some wet paper towel inside.Put one of the seeds in the centre of the bottle.2021/8/11 星期三38The seed have two long shoots,one heading towards the soil and the other growing up towar

24、d the light.2021/8/11 星期三39Sample:I planted three beans in a pot,watered them and left them in a warm light spot.In a week each seed had two small shoots.I cut the ends of a plastic bottle and wrapped it in dark paper.I laid the bottle on its side on the top of the pot of soil and place a wet piece

25、of paper towel inside the bottle.2021/8/11 星期三40I put one of the seeds in the centre of the bottle.Two weeks later the seed had two shoots,one growing up and the other growing down.So I drew a conclusion that shoots grow up towards the light,roots grow downwards into the soil.2021/8/11 星期三412021/8/11 星期三42