北師大版九年級(jí)全冊(cè)Lesson 22 Famous Discoveries完美版ppt課件-課件下載-教習(xí)網(wǎng)

Have yu seen this picture? What’s this?
NASA?n?23rd, July?annunced?the?discvery?f?Kepler-452b,?the?mst?Earth-like?planet?ever fund.?Lcated?1,400?light-years?frm?ur?planet,?NASA?called?it “Earth?2.0”,?because?it’s?the first?planet?discvered?in?the?habitable?zne?f?a?G?star?similar?t?ur?sun.
7月23日，美國(guó)國(guó)家航空航天局(簡(jiǎn)稱(chēng)為NASA)宣布發(fā)現(xiàn)開(kāi)普勒-452b，是迄今為止與地球最為相近的行星。該行星距離地球1400光年，NASA將其命名為“地球2.0”，因?yàn)樗堑谝活w人類(lèi)在宜居帶里與太陽(yáng)相似的恒星附近發(fā)現(xiàn)的行星。
1.與太陽(yáng)相似的恒星被發(fā)現(xiàn)
這顆系外行星編號(hào)Kepler 452b，其直徑約為地球的1.6倍，與恒星之間的距離與日-地距離相近。恒星Kepler 452距離地球大約430秒差距(約合1400光年)，位于天鵝座?！　√煳膶W(xué)家稱(chēng)，這是至今為止發(fā)現(xiàn)的最接近地球的“孿生星球”，跟地球的相似指數(shù)為0.98，并且有可能擁有大氣層和流動(dòng)水?！　ASA說(shuō)這個(gè)星球上可能有活火山，有存在生命的可能性，行星應(yīng)該有60億年歷史，地球?yàn)?5億年。
An internatinal team f scientists said they have discvered the farthest galaxy ever measured in the universe.By using a pwerful instrument called MOSFIRE n the Keck I telescpe at the Keck Observatry in Hawaii, the team thught that the galaxy, EGS-zs8-1, frmed mre than 13 billin years ag at a time when the universe was nly five percent f its present age.
科學(xué)家使用位于夏威夷的凱克天文臺(tái)的望遠(yuǎn)鏡發(fā)現(xiàn)了新星系，并將這個(gè)星系命名為EGS-zs8-1。它是迄今發(fā)現(xiàn)的最遙遠(yuǎn)星系，打破了此前的觀測(cè)紀(jì)錄。
2.宇宙中最遙遠(yuǎn)星系被發(fā)現(xiàn)
What are the peple ding in the fllwing pictures? What d yu think they are trying t discver?
Example: I think the persn in Pht A is bserving the stars. Maybe he is trying t discver a new star.
Key Wrds: Discveries chemistry, d experiments, electricity, health, lab, machine, bserve, physics, research, space, technlgy
Listen and practice.
1.D yu knw any ther scientific discveries?2.Can yu name sme famus nes?3. Amng these discveries, which d yu think are the mst imprtant nes?
Lk at yur wrksheet after class. PPT(26—32)
D yu knw any f them? What’s their majr achievements?
Tu Yuyu has becme the first Chinese wman t win a Nbel Prize(2015), fr her wrk in helping t create an anti-malaria (['?nti?m?l'e?ri?] 抗瘧疾的 ) medicine.
屠呦呦 (1930--)藥學(xué)家抗瘧疾:青蒿素和雙氫青蒿素
2. Many children died very yung because f different diseases. Nw it can be cured(治愈) easily with it.
1. It’s a discvery in physics（身體）. It can g right thrugh sme things like skin(皮膚） and wd but stp by bnes r metal.
3. It’s the building blck f life and we knw a great deal abut what we get frm ur parents frm it.
Read and find the name f the picture A,B and C and make sure whether yur match is right r nt.
The first antibitic: Penicillin 青霉素，盤(pán)尼西林 It can wipe ut the infectin消除感染
Alexander Fleming亞歷山大·弗萊明
When did these things happen? Write the crrect years.
DNA structureduble ciled spiral structure (雙線圈螺旋結(jié)構(gòu)）
Crick Watsn克里克沃森
Wilhelm Rentgen X-ray
1845---1923Germany
What effect d these discveries have?
A lt f diseases can be cured easily with it.
pass n certain characteristics, be able t treat mre disease.
Dctrs treat brken bnes easily with X-rays machines.
DNA(Crick & Watsn)
X-rays(Wilhelm Rentgen)
1. the building blck f life 2. pass n certain characteristics3. be able t treat mre disease
The text is abut…
A lt f diseases can be cured easily with it.
Can yu answer these questins?
Finish them n the wrksheet.
1. What can cure a lt f diseases easily?What passed n certain characteristics frm parents t children?3. What can scientists knw frm the map f ur DNA?4. Wh was the first t study and name X-ray?5. What prize did the discverer f X-ray award?
Answer the fllwing questins
Antibitics, X-rays. (DNA, maybe in the future.)
1. What can cure a lt f diseases easily?
2. What passed n certain characteristics frm parents t children?3. What can scientists knw frm the map f ur DNA?
It tells them a great deal abut what getfrm ur parents.
4. Wh was the first t study and name X-ray?5. What prize did the discverer f X-ray award?
Wilhelm Rentgen.
The first-ever Nbel Prize in Physics.
1. cure vt. 治愈；矯正；解決；消除He needed surgery t cure a trublesme back injury.2. blck n. 塊；街區(qū)；障礙物，阻礙She walked fur blcks dwn High Street.There is a blck f ice.
Language pints
3. pass n 傳遞；去世；前進(jìn)；對(duì)…發(fā)表（意見(jiàn)）He has written a nte asking me t pass n his thanks. 4. treat v. 對(duì)待；治療；處理；款待Dctrs treated her with aspirin.
If Mary’s hand is cut by a knife fr 3days, what will she d?If yur leg gets hurt in P.E, what shuld yu d?If yu have a headache, what can yu d? “Dctr, can yu explain what antibitic is fr me?” asks ne patient.
If yu’re a dctr, Please treat! (Pair Wrk)
Which discvery d yu think is the mst imprtant accrding t the text?
Example: A: I think X-rays are the mst imprtant discvery.B: Why?A: Because with X-rays, dctrs can help fix brken bnes mre easily. …..

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