1、UNIT 4A visit to the moonDo you want to go to the moon?Imagine what you will feel when you are in space? 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. The gravity on the moon i
2、s 1/6 as strong as it is on earth. This means that someone who weighs 150 lbs(磅磅) 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(阿波罗阿波罗) (Moon landing) mission, astronauts discovered that
3、it was easier to hop(跳跳) than it was to walk .Space walk2.It takes the moon one day to move around the earth.3.The earth is the only planet moving around the sun.True or False1. The earth moves around the sun.TFFF4. There is atmosphere on the moon.1._ was the first person landing on the moon? A. Arm
4、strong 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 ABAthe first man in spaceYuri Gagarin The first man on the moonNeil Armstrong Russia 1961U.S.A.
5、1969Do you know who they are?Reading A visit to the moonChina is planning to land on the moon in the near future.Fast reading: True or False1. The force of of gravity would change four times on their journey . ( )2. When they were on the moon, they would not feel the gravity because there was no gra
6、vity on the moon. ( )3. Since the gravity has changed, their walk didnt need a lot of practice. ( )FFFDetailed reading: Read Para 2 carefully and underline 3 sentences that show the changes of the gravity. as he left in space on the moon)the way gravity changedleft the earthin spaceon the moonIt bec
7、ame very light. The gravity became very strong. The gravity disappeared. 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 weig
8、htless.3. It was very light when he was on the moon. He weighs less than on earth.Was their returning painful? What happened to the spaceship?Yes. Fire broke out on the outside of the spaceship.Q&ALast month I visited the moon with my friend. Before we left, I was told the force of _ would change th
9、ree times on our journey. Then we took off. Gradually the weight _. When I was in space, it _. We _ weightlessly in the cabin and I _ _. When I was on the moon, I was surprised to find out even walking needs lots of practice _ _ gravity changed. The returning of the earth was very _. We were amazed
10、to watch fire _ _ on the outside of the ship. gravitylesseneddisappearedfloatedcheered upnow thatfrighteningbreak outSummary If you visit the moon1. what problems will you meet with?2. To solve these problems, what things will you take?Please take down some notes while discussing, after discussion,
11、please report it. Example: If I visited the moon, I might have ? problems: The first one is Because To solve this problem, I would take with me. The second one is Discussion:How to cool youYou might have 4 main problems:How to breatheproblemsWhat to eatWhat to wear spacesuitoxygen tanksspace foodthi
12、ngs needed on the moonIf you follow this advice, I think you will have a good time on the moon. waterHomeworkWrite a passage explaining three problems you might meet on the moon and how you will solve it.2. watch do/doing :观看，注视观看，注视 我们看着太阳正在树后面落下。我们看着太阳正在树后面落下。We _ behind the trees. 每一天当他们看到植物生长，他们
13、的每一天当他们看到植物生长，他们的心里都充满了希望。心里都充满了希望。Every day as they _ , their hearts filled with hope. watched the sun settingwatched the plant grow1). “A + be + 倍数倍数 + as +形容词原级形容词原级 + as + B”. This tree is three times as tall as that one. His father is twice as old as he.2). “A + be + 倍数倍数 +形容词比较级形容词比较级 + than +
14、B ” 3. twice as far as The Yangtze River is almost twice longer than the Pearl River. 长江差不多比珠江长两倍。长江差不多比珠江长两倍。 The number of students in our school is three times larger than that in theirs. 我们学校学生数量是他们学校的三倍。我们学校学生数量是他们学校的三倍。 3). “A + be + 倍数倍数 + the +名词名词 (size, length, amount) + of + B” The newly
15、broadened square is four times the size of the previous one. 新扩建的广场是未扩建时的四倍大。新扩建的广场是未扩建时的四倍大。 Do you regret _(pay) 100 dollars for the painting? No, I would gladly have paid _ (两倍那么多了两倍那么多了)for it.( paying; twice as much) Translation:1. 既然你忙既然你忙, 就让我给你做吧。就让我给你做吧。Now that you are busy, let me do it f
16、or you.2. 既然人都齐了既然人都齐了, 咱们开始干吧。咱们开始干吧。Now that everyone is here lets start work 4. now that 既然；既然； 现在现在/当时当时now that同同since相似，语气较弱，相似，语气较弱，强调人们已知的事实。强调人们已知的事实。Translation:1. 既然你忙既然你忙, 就让我给你做吧。就让我给你做吧。Now that you are busy, let me do it for you.2. 既然人都齐了既然人都齐了, 咱们开始干吧。咱们开始干吧。Now that everyone is here
17、 lets start work1). A + be + 倍数倍数 + as +形容词原级形容词原级 + as + B This tree is three times as tall as that one. 这棵树是那棵树的三倍高这棵树是那棵树的三倍高(比比高两倍高两倍)。 His father is twice as old as he. 他父亲是他年龄的两倍他父亲是他年龄的两倍(大一倍大一倍)。4. But when I tried to step forward, I found I was carried twice as far as on the earth and fell
18、over. 2). A + be + 倍数倍数 +形容词比较级形容词比较级 + than + B The Yangtze River is almost twice longer than the Pearl River. 长江几乎比珠江长江几乎比珠江长两倍长两倍。 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我们学校的学生数量比他们学校的多三倍多三倍。 3). A + be + 倍数倍数 + the +名词名词 (size, length,
19、 amount) + of + B The newly broadened square is four times the size of the previous one. 新扩建的广场新扩建的广场是是未扩建时未扩建时的四倍大的四倍大。 Do you regret _ (pay) 100 dollars for the painting? No, I would gladly have paid _ (两倍那么多了两倍那么多了) for it.( paying; twice as much) How does the force of gravity change if you visit
20、 the moon?gravity: force that attracts objects in space towards each other. 万有引力，万有引力，重力，地心引力重力，地心引力What is the earths natural satellite?The moon.（自然卫星）（自然卫星）the natural force that causes an object to move toward the centre of the earth. GravityPart 1: True or False1. The earth moves around the sun.
21、TFFFT2. It takes the moon one day to move around the earth.3. Earth is the only planet moving around the sun.4. There is atmosphere on the moon.5. Pluto is the smallest planet in solar system?Part 2: Multiple choice: 1. _ is the nearest planet from the sun ? A. Venus B Mars C. Mercury D. Uranus C2.
22、_ is the biggest planet in the solar system?A. Mars B. Pluto C. Earth D. Jupiter D3._ was the first person landing on the moon?A. Armstrong B. Yang liweiC. 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?A.Oct,2003 B.
23、 Jan,2003 C. Oct,2004 D. Jan,2002 ABAIsaac NewtonAlbert EinsteinStephen HawkingDo you known any famous astronomers and their theory on gravity?P30 Fast reading: Read the passage quickly, finish the true or false questions:1. The force of of gravity would change four times on their journey . ( )2. Wh
24、en they were 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. ( )FFF3 timesThe force of gravity change 1 change_ as he left2 change_ when he was in space3 change_ when he was on the mo
25、onvery strongdisappearedvery lightDetail reading: Read Para 2 carefully and underline 3 sentences that are about the changes of the force of the gravity. (as he left, in space, on the moon)Step 3On the moonThe change of gravityThe change of gravityIn spaceVery strongVery heavyDisappeared Floated wei
26、ghtlessly Very light Leave the earthScanning Listening: Listen to the tape and answer the following questions: 1. How many times would the force of gravity change? 2. Was that leaving the moons gravity as painful as leaving the earths?Summary:Last month I visited the moon with my friend. Before we l
27、eft, 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 weight 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 l
28、ots 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. gravityheavylesseneddisappearedfloatedcheered upnow thatfrighteningbreak outStep 5Summary:Last month I visited the moon with my friend. Before we left, I was to
29、ld 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 weight 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. gravityheavylesseneddisappearedfloatedcheered upnow thatfrighteningbreak outStep 4
