课件38张PPT。Unit 4
Astronomy:
the science of the starsWarming upmedicine
biology chemistry astronomy
physics mathematics
geophysics
geology physics biochemistry
biology chemistryAstronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it. astronomerSolar system1.Do you know how did the universe begin?Each religion or culture has its own ideas about the beginning of the universe?Pre-readingPangu separates the sky from the earth.Pangu separates the sky from the earth Pangu separated the earth and sky with an ax. After he died, his breath became wind and cloud; his voice became thunder and his left eye sun and right one moon; arms and legs became edges and mountains; blood became rivers and tendon (筋脉) became roads; muscles became fields and hair stars; teeth and bones became metals, pearls and jade; sweat became rain. Reading
How Life Began on the EarthDo you know the origin of the human beings ?Man had evolved from apes. EarthHow life began on the earthThe Big Bang waterPlants in the waterShellfish and fishPlants on landInsects and amphibiansReptiles Dinosaurs Mammals watergreen plants on land23
4How life began on the earthAnalysing 5
6
7
8forestsshellfish and all sorts of fishinsects (on land)
amphibians (on land and in water) reptiles (on land)
dinosaurs (on land)
mammals (on land) small clever animals with hands and feet
human small plants in water1A cloud of dust
Combine into a solid ball
Explode…with fire & rock
(produce H2O, CO2,O2, N2, other gases) atmosphereCool downwater appeared dissolve harmful gases into … Life beganLife developedThe development of lifeScanning1. What was produced when the earth exploded?
2. How did water come into being on the earth?
3. Where did life first begin, on the land or in the sea?
4. Why were mammals different from other animals?1. What was produced when the earth exploded?
Water vapour , carbon dioxide, oxygen, nitrogen and other gases.
2. How did water come into being on the earth?
The explosion of the earth produced water vapor, which turned into water when the earth cooled down.3. Where did life first begin, on the land or in the sea?
In the sea. Because water dissolved harmful gases and made it possible for life to begin.
4. Why were mammals different from other animals?
Because they produced their young from within their bodies.Careful Reading
Finish the comprehending on page 27Think about what you have read and make choices.Why was the earth different from other planets?
A it produced a lot of heat. B.The water remained.
C Water disappeared. D.It was the oldest planet.Why was life able to develop on the earth but not on other planets?
A The earth had a solid shape.
B. The earth did not have harmful gases in its atmosphere.
C The water stayed on the earth but not on other planets.
D.The earth was not too hot and not too cold.Why was it necessary for plants to grow before animals?A Animals needed plants to protect them from the sun.
B Plants provided oxygen for animals to breathe.
C Animals could hide from hunters in forest.
D It was easier for plants to grow.What problem is caused by human being?A They exist everywhere on the earth.
B They cause global warming.
C They find new methods of growing crops.
D They enjoy hunting and fishing.Text Retelling The explosion of the earth produced_____ ______, which turned into water when the earth cooled down. Water allowed the earth to _________ harmful gases into the oceans and seas. That made it possible for _____ to begin to develop.
The arrival of small _____ encouraged the development of early _______ and all sorts of fish. Many millions of years later the first green plants began to appear on land. watervapourdissolvelifeplantsshellfishLater land animals appeared. Some were_______. Others, called_________, were able to live on land as well as in the sea. When the plants grew into forests, __________appeared for the first time. Then ________developed, which became the most important animals on the earth for millions of years. After they disappeared, ________ became more important. Text RetellinginsectsamphibiansreptilesdinosaursmammalsThey were the last group of animals and they were different because they ______ their young from within their bodies. Small clever animals, with hands and feet, ________ and _______ all over the earth. As time went by, they covered the earth and have become the most important animals on the planet.Text RetellingproducedappearedspreadLanguage points1. It exploded loudly with fire and rock, which were in time to produce the water vapour, …1). （使某物）炸开，爆炸 2). （指感情）激发 3). （指人口）突然或迅速增加 The firework exploded in his hand and he was hurt seriously. I was frightened when she exploded into loud laughter. Now it is not easy to find jobs with the exploding population. explosion n. 爆炸（声） explosive adj.爆炸性的，易爆炸的 n.炸药，爆炸物 2. Nobody knew that it was going to be different from other planets going round the sun. be very / much / quite / entirely / totally different from与…不同 City life is quite different from country life. 1）城市生活和农村生活很不同。2）他们的品位和我不同。Their tastes are different from mine. There are differences between…and…
…与…之间有不同之处
tell…from… 把…与…区分开来
the same as… 与…一样
be similar to 与…相似 3. It allows the earth to dissolve harmful gases, which… allow vt. 允许、许可、容许allow+n./pron./doing allow sb. to do be allowed to doMy father doesn't allow smoking at home. In fact he doesn't allow us to smoke anywhere at any time.父亲不允许在家里吸烟。实际上，他不允许我们在任何地方任何时候吸烟。Are we allowed to use the computer?我们可以用电脑么？4. This encouraged the development of early shellfish and all sorts of fish.encourage 鼓舞；促进；怂恿。后接名词、代词，也可接不定式作宾语补足语。如：High prices for corn and wheat will encourage farming.玉米和小麦的高价将促进农业的发展。My success encouraged me to continue.我的成功鼓励我继续干下去。He encouraged me to learn dancing.他鼓励我去学跳舞。5. Many millions of years later the first green plants began to appear on land. late adj. 迟到的，晚的；前任的；以前的；已故的 later adv. 后来，较晚时候,过后 adj. late的比较级(更迟的,更后的) latest adj. 最新的 lately adv. =recently 近来 1) Mr. Zhu Rongji is the late Prime Minister of China. 3) She said she would ring you later this morning. 5) It's only lately that she has been well enough to go out. 2) He is often late for school. 4) Have you heard about the latest news? 6. Small clever animals, now with hands and feet, appeared and spread all over the earth. vi. 散布, 传播，蔓延, 伸展，扩展 vt. 铺开，摊开 1) The news spread through the school very quickly.
2) There's a desert spreading for hundreds of miles. 3) He spread out his arms to welcome us.
4) I spread a new cloth on the table. 7. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. 阻止某人做某事 :prevent sb. (from) doing sth. stop sb. (from) doing sth. keep sb. from doing sth. 1) We must prevent them from making trouble. 2) You should prevent the child from injuring himself. If nothing prevents, …如果没有什么阻碍的话 , …8. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. depend on sb. / sth. sb. to do sth.
sb. doing sth. sb. /sth. for sth. 相信，信赖, 依靠,依赖,视…而定，取决于 1) When you are in a strange place you'd better depend on the map. 2) You can't depend on others to help you. 3) All living things depend on the sun for their growth. 4) He depends on his pen for his living. wh- 5) You can depend on him. He'll lead you there.
6) Success depends on your own hard work.
7) Our success depends on whether everyone works hard. depend on it 没问题，请放心（句末或句首） That /It (all) depends. 那得看情况而定 1) Depend on it, you'll succeed. 2) He may support me, but it depends . Tell him what you want to say; he's a man to __.
A. count B. believe C. trust D. depend
解析:相信/信赖某人:
count on sb.
believe in sb.
depend on sb.
trust (in) sb.C课件21张PPT。Unit 4 Astronomy the science of the stars
Using language Do you know the following scientists? Who are they?
What have they discovered? Listening and discussingIsaac Newton,
牛顿 1642―1727 Universal gravitation 万有引力Einstein, Albert (1879-1955)
爱因斯坦Relativity（相对论） and the Cosmos （宇宙）The theory about black holes
（黑洞理论）霍金 Listen to Part 1 and Part 2 of the tape and choose the best summary of the listening text.
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 developed over a long period of time.
C The text is about the importance of three scientists and their work.
Large bodies have a force which pulls things towards them.The bigger the object the stronger the gravity.Listen to Part 1 again and fill in
the first column of the chart. Then listen to Part 2 again and fill in the rest.Albert EinsteinStephen HawkingIn 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.If you go over the edge, you cannot get out; but if you do not, you may be able to escape.Time goes slower in very strong gravity.Reading A VISIT TO THE MOONRead the whole passage and answer the following questions.
How many times would the force of gravity change on our journey?
Why is the spaceship not falling back to he earth?
What happened when the writer tried to step forward?He found he was carried twice as far as the earth and fell over.Fast reading Because they are too far from the earth to feel its pull.Three times.Important sentences and language pointsCareful reading 1. I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.cheer up : 欢呼，喝彩，感到高兴，使高兴。当看到球队的到来，人群欢呼起来。
_____________________ when they
saw the team arrive.他带她去听音乐会来使她高兴。
He took her _____________ to
____________.The crowd cheered upto the concertcheer her upwatch …do/doing :观看，注视 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，他们的心里都充满了希望。
Every day as they __________________ , their hearts filled with hope. watched the sun settingwatched the plant grow2. "Oh dear," I cried, " walking does need a bit of practice now that gravity has changed." now that :既然，由于既然每个人都到了，我们就可以开始会议。
_________________________, we can
begin the meeting.由于你是一个大男孩,你就必须行为表现得更好.
_______________________, you must
behave better.Now that everybody is hereNow that you are a big boy3. We watched, amazed as fire broke out
on the outside of the spaceship as the earth's gravity increased.amazed 是过去分词，此处做状语用 他进来的时候没有人注意到.
He came in _________ .break out (战争,争吵,疾病等)爆发在深夜,突然有人吵架.
_________________ suddenly at midnight.A quarrel broke outunnoticedHomeworkReview the reading materials.
Find out the beautiful sentences in this unit.课件77张PPT。
Unit 4 Astronomy：the science of
the stars 学科网system fundamental thus atmosphere multiply climate gentle satellite astronomy astronomer theory theoretical globe global violent violence unlike like dislike harmful harm 学科网exist existence puzzle puzzled puzzling solar system in time give birth to in one’s turn prevent...from block out cheer up now that get the hang of break out watch out for 学科网What it was to become which made it possible twice as far as on the earth does need now that gravity has changed 语境填词——常用单词自测 重点掌握的单词选词填空——常用短语自测 重点掌握的短语 完成句子——常用句式自测 重点突破的句式 单元语法 Thanks
