初中英语北师大版九年级全册Lesson 22 Famous Discoveries评课ppt课件

这是一份初中英语北师大版九年级全册Lesson 22 Famous Discoveries评课ppt课件，共49页。PPT课件主要包含了Show time，Lesson 22，Lead-in等内容，欢迎下载使用。
在第二课时学习结束时，学生能够：1、发现、归纳if 条件状语从句的语意功能 。2、通过习题的操练 ，正确运用主句和从句的时态。3、通过对灾难的应急措施的表达 ，正确恰当的使用if条件状语从句。4、培养学生在遇到突发紧急事件时，自救和帮助他人的意识。
Think abut it
If we learn mre abut DNA, we will be able t treat mre diseases.
Is this a real situatin? Can we learn mre abut DNA?
Read the passage and underline the sentences like this.
If we d nt use them crrectly, they can cause serius health prblems.
If we discver mre abut the human bdy, we can help peple live lnger and better lives.
Which part f the sentence, which clause, expresses the cnditin?
Which expresses the result if the cnditin happens?
What’s the verb in the if-clause?What’s the verb in the result clause?
We can als use a mdel verb, such as can , in the result clause.
If we discver mre abut the human bdy, we can help peple live lnger and better lives.
Cmplete the sentences with the crrect frm f the verbs
If yu g t bed late, yu will feel tired the next day.Yu can jin the Chess Club if yu are interested in it.We will stay at hme if it rains tmrrw.If I finish the wrk early, I will play basketball with yu.
If I have a ten-day hliday,___________.
Share yur ideas.
If a famus scientist calls me, ____________
Wrk in grup f fur and have a discussin. Chse ne f the three tpics which yur grup members are interested in and list what yu shall d r nt d if an earthquake/fire/fld happens s that we will be able t survive.
What can/will yu d if there is __ ?
Save peple arund usArrange t help thersVides are just the beginningEncurage mre peple t take actins
1. Chse ne f the tpic and write a shrt passage abut what yu will d if __________.2. 完成Wrkbk Lessn 22 的练习。
Thank yu fr watching~
Getting ready & Reading
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，美国国家航空航天局(简称为NASA)宣布发现开普勒-452b，是迄今为止与地球最为相近的行星。该行星距离地球1400光年，NASA将其命名为“地球2.0”，因为它是第一颗人类在宜居带里与太阳相似的恒星附近发现的行星。
1.与太阳相似的恒星被发现
这颗系外行星编号Kepler 452b，其直径约为地球的1.6倍，与恒星之间的距离与日-地距离相近。恒星Kepler 452距离地球大约430秒差距(约合1400光年)，位于天鹅座。　　天文学家称，这是至今为止发现的最接近地球的“孪生星球”，跟地球的相似指数为0.98，并且有可能拥有大气层和流动水。　　NASA说这个星球上可能有活火山，有存在生命的可能性，行星应该有60亿年历史，地球为45亿年。
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.
科学家使用位于夏威夷的凯克天文台的望远镜发现了新星系，并将这个星系命名为EGS-zs8-1。它是迄今发现的最遥远星系，打破了此前的观测纪录。
2.宇宙中最遥远星系被发现
What are the peple ding in the pictures? What d yu think they are trying t discver?
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 (['æntiːməl'eəriə] 抗疟疾的 ) medicine.
屠呦呦 (1930--)药学家抗疟疾:青蒿素和双氢青蒿素
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（身体）. It can g right thrugh sme things like skin(皮肤） 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.
1st reading: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，盘尼西林 It can wipe ut the infectin消除感染
Alexander Fleming亚历山大·弗莱明
3 When did these things happen? Write the crrect years.
2nd reading
DNA structureduble ciled spiral structure (双线圈螺旋结构）
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.
3rd reading
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.
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.…….
Activity 1: 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. …..
Activity 2:
Finish Ex 1 n P99.If yu live in schl r travel arund fr mre than 10 days, what will yu take in yur medicine bag（急救包）? Discuss with yur partner, and write dwn n the wrksheet.
Name: Niclaus Cpernicus 哥白尼Achievement: helicentric thery 日心说
1473－1543 Pland
Name: Galile 伽利略Achievement: Principle f inertia 惯性原理
1564－1642 Italy
Newtn牛顿law f gravitatin万有引力定律
1643—1727 Britain
Michael Faraday 迈克尔·法拉第Electrmagnetic inductin 电磁感应
1791～1867 Britain
William Harvery威廉·哈维 Bld circulatin血液循环
1578-1657 Britain
Rbert Kch 罗伯特·科赫 Pathgenic bacteria (病原细菌)
1843----1910 Germany
Wilhelm Knrad Rntgen威廉·康拉德.伦琴X-rays (X射线)
1845---1923