人教高中英语必修3Unit4 Unit 4 Astronomy: the science of the stars Using language （共17张PPT）

(共17张PPT)
a visit to the moon
Unit 4 Using language

a natural satellite
Do you want to visit the moon?
Step 1　Fast Reading
Scan the passage and then choose the best answers according to the passage.
1．The passage mainly talks about ________.
A．what the moon is
B．my visit to the moon
C．the differences between the earth and the moon
D．Li Yanping, my friend, who is an astronaut

2.When we were going up, we felt ________.
A．we were pressed against our seats
B．we were lighter than we are on the earth
C．as if we were flying
D．the rocket was shaking strongly
3.Why can't the spaceship fall back to the earth?
A．Because the moon's gravity pulls it up.
B．Because it is too far away from the earth.
C．Because the earth has no gravity.
D．Because the spaceship is not very heavy.


4.If a baby is growing on the moon, when he grows up, he will grow ________ than he is on the earth.
A．taller B．shorter
C．fatter D．thinner

Was there anything changed on their journey?


How many times would the force of gravity change on their journey? When? Which change would be the most powerful? What about his weight?


Step 2 careful reading(answering questions)
Yes. The pull of the earth’s gravity changed.
On the moon
The change of gravity

In space
Very strong
Disappeared
Very light
Leave the earth
On the earth In space On the moon
The weight changed
He became very heavy.
He had no weight and could float weightlessly around in their spaceship.
His weight was less than on the earth.
3. What happened to him when he tried to
step forward?

4. Why was returning to the earth very
frightening?

5. How did he feel?

I was carried twice as far as on the earth and fell over.
Fire broke out outside the spaceship and they were pushed hard into their seats.
He felt very exhausted but very excited too.

6.What is the writing form ?
story B. Travel journal
C. report D. biography

7.The text is written in the order of _____ ?
space B. logic
C. time D. development

Last month, I was lucky enough to have a chance _______(make)a trip to the moon. Before we left, I was told______ the force of gravity would change three times. Then we were off. _____we left the earth, I became very heavy, and gradually the weight (less). When we were in space, the weight disappeared, we floated __________(weight)in the cabin and I cheered .
to make
lessened
weightlessly
As
up
that
Summary
On the moon, we were surprised to find we were carried ______(two) as far as on the earth. Walking _____(do) need lots of practice now ______ gravity has changed. After a while, I got the hang of it and began to enjoy ________(we). Returning to the earth was very frightening. We watched and amazed as fire broke out on the outside of the space ship.
twice
does
that
ourselves

1. After reading the story, do you want to visit the moon?
2.Whether is the space worth exploring for human beings? Why?
The space exploring
benefit our life


solve the energy shortage
waste much money

too far to know

speaking
就刚才同学们讨论“太空探索是否值得”的话题写一篇短文介绍讨论的情况并说明你的观点
30%的同学反对：1. 离我们及我们的日常生活太远 2. 浪费金钱，这些金钱本可以用来解决饥饿，污染等问题。
70%的同学赞成：1. 已使用卫星进行通讯传播，天气预报等；2.有望解决地球能源短缺问题.
writing
presentation
找出错误，修改
标注出你认为他/她写得好的句子
homework
Read the text again and find out the useful expressions