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1、.,1,UNIT 4 A visit to the moon,.,2,Do you want to go to the moon? Imagine what you will feel when you are in space?,.,3,The pull of the earths gravity will disappear when you are in space. You will be weightless.,The gravity of the moon is very light. You will weigh less than on the earth.,.,4,The g
2、ravity on the moon is 1/6 as strong as it is on earth. This means that someone who weighs 150 lbs(磅) on Earth would weigh only 25 lbs on the moon! You might think that this would make walking much easier, but it is actually quite difficult Later in the Apollo(阿波罗) (Moon landing) mission, astronauts
3、discovered that it was easier to hop(跳) than it was to walk .,.,5,Space walk,.,6,2.It takes the moon one day to move around the earth.,3.The earth is the only planet moving around the sun.,True or False,The earth moves around the sun.,T,F,F,F,4. There is atmosphere on the moon.,.,7,1._ was the first
4、 person landing on the moon? A. Armstrong B. Yang liwei C. Tom Cruise D. Issac Newton,2. When did he land on the moon? A. 1921 B. 1969 C. 1954 D. 1949,3. When did Yang Liwei go to the space? A. Oct,2003 B. Jan,2003 C. Oct,2004 D. Jan,2002,A,B,A,.,8,the first man in space,Yuri Gagarin,The first man o
5、n the moon,Neil Armstrong,Russia 1961,U.S.A. 1969,.,9,Do you know who they are?,.,10,.,11,.,12,Reading A visit to the moon,China is planning to land on the moon in the near future.,.,13,Fast reading: True or False,The force of of gravity would change four times on their journey . ( ) 2. When they we
6、re on the moon, they would not feel the gravity because there was no gravity on the moon. ( ) 3. Since the gravity has changed, their walk didnt need a lot of practice. ( ),F,F,F,.,14,Detailed reading: Read Para 2 carefully and underline 3 sentences that show the changes of the gravity. as he left i
7、n space on the moon),.,15,It became very light.,The gravity became very strong.,The gravity disappeared.,.,16,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 disap
8、peared 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.,.,17,Was their returning painful? What happened to the spaceship?,Yes. Fire broke out on the outside of the spaceship.,Q twice as much),.,27,Translation: 1. 既然你忙, 就让我给你做吧。 Now t
9、hat you are busy, let me do it for you. 2. 既然人都齐了, 咱们开始干吧。 Now that everyone is here lets start work,.,28,4. now that 既然； 现在/当时,now that同since相似，语气较弱， 强调人们已知的事实。,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, 咱们开始干吧。 Now that everyone is here lets start work,.
10、,29,1). A + be + 倍数 + as +形容词原级 + as + B This tree is three times as tall as that one. 这棵树是那棵树的三倍高(比高两倍)。 His father is twice as old as he. 他父亲是他年龄的两倍(大一倍)。,4. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over.,.,30,2). A + be + 倍数 +形容词比较级 + than + B
11、The Yangtze River is almost twice longer than the Pearl River. 长江几乎比珠江长两倍。 The number of the students in our school is three times larger than that in theirs. 我们学校的学生数量比他们学校的多三倍。,.,31,3). A + be + 倍数 + the +名词 (size, length, amount) + of + B The newly broadened square is four times the size of the p
12、revious one. 新扩建的广场是未扩建时的四倍大。,.,32, Do you regret _ (pay) 100 dollars for the painting? No, I would gladly have paid _ (两倍那么多了) for it. ( paying; twice as much),.,33,How does the force of gravity change if you visit the moon?,gravity: force that attracts objects in space towards each other. 万有引力，重力，
13、地心引力,What is the earths natural satellite?,The moon.,（自然卫星）,.,34,the natural force that causes an object to move toward the centre of the earth.,Gravity,.,35,Part 1: True or False,The earth moves around the sun.,T,F,F,F,T,2. It takes the moon one day to move around the earth.,3. Earth is the only pl
14、anet moving around the sun.,4. There is atmosphere on the moon.,5. Pluto is the smallest planet in solar system?,.,36,Part 2: Multiple choice:,1. _ is the nearest planet from the sun ? A. Venus B Mars C. Mercury D. Uranus,C,2. _ is the biggest planet in the solar system? A. Mars B. Pluto C. Earth D.
15、 Jupiter,D,.,37,3._ was the first person landing on the moon? A. Armstrong B. Yang liwei C. Tom Cruise D. Issac Newton,4. When did he land on the moon? A. 1921 B. 1969 C. 1954 D. 1949,5. When did Yang Liwei go to the space? Oct,2003 B. Jan,2003 C. Oct,2004 D. Jan,2002,A,B,A,.,38,Isaac Newton,Albert
16、Einstein,Stephen Hawking,Do you known any famous astronomers and their theory on gravity?,.,39,P30 Fast reading: Read the passage quickly, finish the true or false questions:,The force of of gravity would change four times on their journey . ( ) 2. When they were on the moon, they would not feel the
17、 gravity because there was no gravity on the moon. ( ) 3. Since the gravity has changed, their walk didnt need a lot of practice. ( ),F,F,F,.,40,very strong,disappeared,very light,Detail reading: Read Para 2 carefully and underline 3 sentences that are about the changes of the force of the gravity.
18、(as he left, in space, on the moon),Step 3,.,41,On the moon,The change of gravity,In space,Very strong,Very heavy,Disappeared,Floated weightlessly,Very light,Leave the earth,Scanning,.,42,Listening: Listen to the tape and answer the following questions: 1. How many times would the force of gravity c
19、hange? 2. Was that leaving the moons gravity as painful as leaving the earths?,.,43,Summary:,Last month I visited the moon with my friend. Before we left, I was told the force of g_ would change three times on our journey. Then we took off. As we left the earth, I became very h_. gradually the weigh
20、t l_. when I was in space, it d_. we f_ weightlessly in the cabin and I c_ _. when i was on the moon, I was surprised to find out even walking needs lots of practice n_ _ gravity changed. The returning of the earth was very f_. we were amazed to watch fire b_ _ on the outside of the ship.,gravity,he
21、avy,lessened,disappeared,floated,cheered up,now that,frightening,break out,Step 5,.,44,Summary:,Last month I visited the moon with my friend. Before we left, I was told the force of g_ would change three times on our journey. Then we took off. As we left the earth, I became very h_. gradually the we
22、ight l_. when I was in space, it d_. we f_ weightlessly in the cabin and I c_ _. when i was on the moon, I was surprised to find out even walking needs lots of practice n_ _ gravity changed. The returning of the earth was very f_. we were amazed to watch fire b_ _ on the outside of the ship.,gravity,heavy,lessened,disappeared,floated,cheered up,now that,frightening,break out,Step 4,