2020-2021学年Unit 4 Journey Across a Vast Land课文内容ppt课件

这是一份2020-2021学年Unit 4 Journey Across a Vast Land课文内容ppt课件，共19页。PPT课件主要包含了speaking等内容，欢迎下载使用。
Predict by using picturesOne way t get mre ut f yur listening is t predict what yu will hear. Using the pictures prvided and the knwledge yu already have, yu can guess the kinds f infrmatin yu shuld listen fr. At times, yu may even be able t guess exactly what will be talked abut. This will help yu fcus better when listening, making yur listening mre effective.
Learning tip
Lk at the pht belw, and discuss in grups what these activities have t d with science.
A I think the dish in this exhibitin is related t sund. Maybe the by is whispering int the smaller circle and the dish can make his vice luder.
This lks like a pian yu play with yur feet. Maybe it shws hw sund wrks.
C I'm nt sure what this ne shws, but it must be abut light r eyesight.
D It is a hall f mirrrs. Maybe it has t d with the principles f reflectin.
E This is prbably an experiment invlving the cmpsitin f light.
The phts abve are related t the cnversatin yu will hear. Using the phts, try t predict the answers t the fllwing questins.1. Where are the peple in the cnversatin ging t g?2. What kind f place is it, and what des it fcus n?3 .What kinds f things can yu d there?
 Befre listening:
 1 Where are the peple in the cnversatin ging t g? They are ging t a science museum.2. What kind f place is it, and what des it fcus n? It is a science museum that fcuses n letting visitrs experience science thrugh interactive learning exhibitins.3 .What kinds f things can yu d there?Yu can prbably try different activities t learn abut sund, light, reflectin, and s n. Fr example, yu can g t a rm with many mirrrs facing each ther s it lks like there are many cpies f yu! Or yu can play with a big pian n the flr.
3 Listen t the cnversatin and see if yur answers fr Activity 2 are crrect. Then write dwn the letters (A-E) fr the phts in the rder that yu hear them described.
1_________________2________________3.________________ 4________________5_________________
4. Listen again and cmplete the descriptins f the phts abve.
Pht A: A giant dish; when yu speak int it, it _________________ the sund back and _____________.Yu can use it t speak in a_____________ t smene 17 meters away,Pht B: A giant ____________.that yu can use yur feet t play. Instead f playing the sunds f a pian, it plays the vices f________________.Pht C: Yu lk at a blue screen fr a while, and then suddenly yu can see________________ mving arund n it. These are ur_______________________Pht D: A______________________ where yu can see yurself reflected thusands f times.Pht E: Yu stand in frnt f_______________ and it casts different shadws f yu, in________________________ the rainbw.
makes it luder
pian keybard
classical singers
tiny bright lights
wn bld cells
hall f mirrrs
a white light
every clr f
1. The cnversatin is abut the City f Science and Industry, a museum in Paris. Wuld yu like t g t this museum? Why r why nt?Yes . I can learn a lt abut science and it can braden my hrizns.2. Are there any museums like this in China? What ther interesting museums are there?Yes. There are ther interesting museums such as art museum r museum abut ancient treasure.
Make a shrt presentatin t the class abut yur chice. Use the example and useful phrases belw t help yu.EXAMPLETday, I want t talk t yu abut a very strange phenmenn called a nn-Newtnian fluid. Yu can make it easily using equal parts f water and crnflur, like I have here. Ann-Newtnian fluid is strange because yu can pur it like a liquid, but if yu put any pressure n it, it suddenly becmes hard as cncrete. In fact, it becmes hard enugh t stand n. Then, as sn as yu take the pressure ff, it becmes a liquid again. This shws that it is pssible that smething can exist as a liquid and a slid at the same time.
Make a shrt presentatin
useful phrases:Talking abut scientific phenmena.. can/cannt exist in the frm f a slid/gas and a liquid/plasma Is bth a ... And a.. . at the same time light/sund is reflected the existence f ther…This ccurs when yu will becme demnstrates ….This experiment/research shws. .. Thrugh this, we knw that can prve that evidence prves …
Tday, I want t talk t yu abut the psitive and negative charges f mlecules. We can demnstrate hw these interact thrugh a simple experiment using milk, dish sap, and fd clring. First, cver the bttm f a shallw plate with milk. Nw add tw r three drps f different liquid fd clring t the center f the milk. They shuld frm ne large dark puddle in the middle f the milk. Nw, dip a cttn swab int dish sap, and it int the middle f the fd place clring. Yu will see the clrs quickly mve t escape frm the sap, making interesting and beautiful patterns. This happens because the dish sap mlecules have a strng negative charge, and the milk mlecules have a strng psitive charge. Like magnets, these mlecules are attracted t each ther, and s they appear t mve arund n the plate, taking the fd clring with them, making it lk like the clrs are quickly mving t escape frm the sap.
Listening text:
Judy: Oh, I'm s srry that yu were ill and culdn't cme with us n ur field trip. Hw are yu feeling nw? Better? Bill: Much better, thanks. But hw was it? Judy: Wnderful! I especially liked an area f the museum called Light Games.it was really cl. They had a hall f mirrrs where I culd see myself reflected thusands f times! Bill: A hall f mirrrs can be a lt f fun. What else did they have? Judy: Well, they had an experiment where we lked at a blue screen fr a while, and then suddenly we culd see tiny bright lights mving arund n it. Yu'll never guess what thse bright lights were! Bill: Cme n, tell me!
Judy: They were ur wn bld cells. Fr sme reasn, ur eyes play tricks n us when we lk at a blue screen, and we can see ur wn bld cells mving arund like little lights! But there was anther thing I liked better. I std in frnt f a white light, and it cast different shadws f me in every clr f the rainbw! Bill: Oh, I wish I had been there. Tell me mre!Judy: Well, they had anther area fr sund. They had a giant pian keybard that yu culd use yur feet t play. But then, instead f playing the sunds f a pian, it played the vices f classical singers! Then they had a giant dish, and when yu spke int it, it reflected the sund back and made it luder. Yu culd use it t speak in a whisper t smene 17 metres away