1、人教课标 高一 必修 3 Unit 4,Unit 4Astronomy: the science of the stars,Pre-listening,Isaac Newton 16421727 英国物理学家,经典物理学理论体系的建立者,1665年创立微分；1666年开始研究积分。1666年, 开始想到研究重力(gravity)问题，苹果落地的传说，也是在此时发生的轶事。其一生的重大科学思想是在这两年期间（22至23岁）形成的。1669年，把自然哲学的数学原理，宇宙体系等手稿送到剑桥大学图书馆收藏。晚年研究宗教。,Albert Einstein (18791955),质量(m)和能量(E)的相
2、当性：Emc2 爱因斯坦在量子论、分子运动论、相对论(Theory of Relativity)等物理学的三个不同领域取得了历史性成就，特别是狭义相对论的建立和光量子论的提出，推动了物理学理论的革命，他对社会进步事业也有重要贡献。,Stephen Hawking born in 1942,斯蒂芬藿金是当今科学界的一位传奇人物。这不仅仅因为他是一位被誉为继爱因斯坦后最著名的科学思想家和最杰出的理论物理学家，还在于他是在常人无法想象的身体状况下进行研究和创造性工作的。,black hole 黑洞,黑洞并非只是吞噬物质。除了会在星系形成的过程中扮演重要角色外，在经过一段相当漫长的时间后，黑洞也会把一
3、些曾被它吸入的物质信息向外界释放出来。,Now were going to listen to a talk about the theories of gravity. Listen carefully and try to get the main idea of it.,Listening,A The text is about how three scientists wanted to find out about the beginning of the universe.B The text is about how the idea of gravity has develop
4、ed over a long period of time.C The text is about the importance of three scientists and their work.,Choose the best summary.,Summary B is correct because it gives a clear idea of what the listening passage is about. Summary A is not true. The three scientists wanted to explain how the universe work
5、ed and not how it began.Summary C is too general and does not give enough detail about what the listening passage is about.,Listen to the tape again and fill in the chart.,Large bodies have a force which pulls things towards them.,In space large objects make space and time bend; the larger the objec
6、t, the further space and time bend.,Black holes have a very large mass and pull things towards them.,The bigger the object the stronger the gravity.,Time goes slower in very strong gravity.,If you go over the edge, you cannot get out; but if you do not, you may be able to escape.,spacewalk,Look at t
7、he pictures!,Read the passage carefully and then describe the three ways in which gravity changed for Li Yanping and how his weight changed.,1. The pull of gravity became very strong she left the earths atmosphere. His weight is normal.,2. It disappeared when he was in space. He is weightless.,3. It
8、 was very light when he was on the moon. He weighs less than on earth.,1. . “walking does need a bit of practice now that gravity has changed.” .既然引力改变了，走路也的确需要练一练了。,now that同since相似，语气较弱，强调人们已知的事实。,Language points,Translation:1) 既然你忙, 就让我给你做吧。Now that you are busy, let me do it for you.2) 既然人都齐了, 咱
9、们开始干吧。Now that everyone is here, lets start work.,及时练,2. We watched, amazed as fire broke out on the outside of the spaceship as the earths gravity increased. break out 它与happen, take place, come out等词的用法一样，是不及物动词，不能带宾语，不能用于被动语态。,1) 战争爆发e.g. The American Civil War broke out in 1861. 美国内战爆发于1861年。2)
10、发生争吵e.g. A quarrel broke out between them. 他们之间发生了争吵。,3) (火灾)发生 e.g. Afirebrokeoutinhishouselastnight. 昨晚他家里失火了。,考点 break out通常指战争、疾病、灾害等的爆发。不及物动词短语，不能用于被动语态。,I was still sleeping when the fire _, and then it spread quickly.A. broke out B. put outC. came out D. got out点拨 put out扑灭；come out出来, 出版；get
11、 out（使）出来。由it spread quickly（火迅速蔓延）可知选A。,及时练,break down 打破; 毁掉; 破除; 坍塌; 坏掉 break in 破门而入; 打断,break away from 脱离; 打破陈规,与break相关的短语:,break through 突围; 突破; 冲垮; 克服break up 打碎; 拆散; 分裂; 分解break ones word / promise食言; 说话不算数,选用方框内合适的词或短语，并用其适当形式填空。(其中有一个多余选项) There was a _ of people around the club entrance
12、.2. You ought to have a good rest _ youve finished the work.,mass,now that,课堂练习,float now that mass pullget the hang of watch out,3. She spent the afternoon _ on her back in the pool.4. It seems difficult at first, but youll soon _ it.5. You have to _ because there are land-mines all over the place.
13、,watch out,floating,get the hang of,float now that mass pullget the hang of watch out,II. 根据括号内的提示翻译下列句子。,1. 老师幽默的讲话让我们很振奋, 之后班里的气氛也轻松起来。(atmosphere; cheer up),The atmosphere in the classroom relaxed after the teachers humorous talk cheered us up.,3. 让我们十分失望的是, 战争最终在那两个国家之间爆发了。(to ones disappointmen
14、t; break out),Now that we have finished the design, the company will do the construction in its turn.,2. 既然我们已经完成了设计, 就该由公司来进行建设了。(now that; in ones turn),To our great disappointment, a war broke out between the two countries at last.,6. 我感觉风从一扇敞开的窗子里正往我脸上吹。(feel . doing),5. 这个小女孩看见他偷了那本书, 这件事是真的。(watch . do),Its true that the girl watched him steal that book.,I felt the wind blowing on my face from an open window.,Homework,Collect passages about gravity.Prepare for speaking.,Thank you!,
