广东省阳东广雅学校高中英语《Unit4 Astronomy the science of the stars》教案(6)新人教版必修3

The Sixth period Using Language
Teaching goals 教学目标
1. Ability g oals 能力目标
Practice Ss’s abilty of listening and reading
2. Learning ability goals 学能目标
Enable Ss to get knowledge of great scientists and science
Teaching important points教学重点
a. the three s cientists’ different ideas and the result of their work
b. the experience of Li Yaping’s visit to the moon
Teaching difficult points教学难点
Understand the listening text.
Teaching aids教具准备
A recorder, a computer and a projector.
Teachin g procedures & ways教学过程与方式
Step I Lead in
T: We have learnt a lot about astronomy, have you got interested in it? If you are going to study astronomy, what problem will you face most?
S2: Gravity.
T: What is gravity?
S3: Everything will fall back to the earth if it is dropped or thrown away. The pull of the earth is called gravity.
T: Quite right. Who first got the idea of gravity?
S4: Isaac Newton.
T: How did he get the idea?
S5: One day he was sitting under the tree. He saw an apple fall, which made him get the idea. Besides Newton, are there any other scientists who made a great contribution to the idea of gravity?
S6: Albert Einstein, Stephen Hawking.
T: How did each of them think of gravity? Or did they share the same idea of gravity? Come on, the tape will tell you.
Step II Listening
1. Listen to the tape and choose the best main idea of the listening passage
(Ex.2 P30). Main idea: A The tex t is about how three scientists wanted to find out about the
beginning of the universe. B T he text is about how the idea of gravity has developed ov er a long
period of time. C The text is about the importance of three scient ists and their work The best answer:
Summary B is correct because it gives a clear idea of what the listening passage is about.
Listen to the tape again and fill in the chart in Ex. 3 on P30. (not a thing) into which matter has fallen and from which nothing can escape — not even light. So we can’t see a black hole. A black hole exerts a stron g
gravitational pull and yet it has no matter. It is only space - or so we think.) Step III Reading
1. passage understanding
Isaac Newton Albert Einstein Stephen Hawking
Idea Large bodies have a
force which pulls
things towards them.
In space large objects make space and time bend; the larger the object, the further space
and time bend. Black holes have a very large mass and pull things towards them.
Development 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.
T: All the three great scientists Newton, Einstein and Hawking played an important role in the development of ideas of gravity. Would you like to know more about gravity?
Ss: Yes.
T: Is the moon’s gravity the same as that of the earth?
S1: No.
T: Read the passag e and then describe the three ways in which gravity changed for Li Yanping and how his weight changed.
Ss:
1. The pull of gravity became very strong he left the earth’s atmosphere. His
weight is normal.
2. It disappeared when he was in space. He is weightless.
3. It was very light when he was on the moon. He weighs less than on earth.
2. Language points
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。

2. We watched, amazed as fire broke out on the outside of the spaceship as the earth’s 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) 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. A fire broke out in his house last night. 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。

与break相关的短语:
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
break through 突围; 突破; 冲垮; 克服
break up 打碎; 拆散; 分裂; 分解
break one’s word / promise食言; 说话不算数
Step IV Homework
Collect passages about gravity. Prepare for speaking.。