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1、unit 13 reading and integrating ski I Is（人教版高二英语下册教案教学设计）Teaching Aims:1. Learn and master the following words and phrases:cube, property all the way, that is.2. Improve the students reading ability3. Enable the students to realize that it is important to protect that water on our planet.Teaching Im
2、portant Points:1. Improve the students reading ability2. Master the following phrasesAll the way, that is , mix with, take advantage of , manage to doTeaching Difficult Points:How to make the students understand the reading passage betterTeaching Methods: the blue seas.99% of the living space on ear
3、th is in the oceans.What does this fact result in? Marine life is incredibly rich and varied.Can you give some specific numbers or examples? 5 million species in the oceansWhat does this fact imply? Do you agreeParagraph 2.H20:2 + 1 = 1medium: average channel means conditionpolar: + - t (positive en
4、d: + - t Inegative end: + - t INormal state of water: solid liquid gasWhy is the chemical structure of water important?1. Because water is polar, it can break down both solids and gases.2. The nutrients in whatever falls into the ocean quickly become available to other living creatures.3. The chemic
5、al structure of water also makes it different from almost everything else on earth. The nutrients in whatever falls into the ocean quickly become available to other living creatures, (paraphrase)Water is an excellent medium for life.Why do you agree with it?1. Water is a liquid at room temperature a
6、nd has a relatively high freezing point;2. All living creatures need food to survive, but on many occasions the nutrients become available to living things only when they are dissolved by water.Waters unique chemical structureCan you give some other examples which are also resulted from water s uniq
7、ue chemical structure?1 . We can get a lot of nutrients by drinking soup.2 .Plants can pull water up their roots via a capillary(毛 2田管)process.Paragraph 3.sea water (salt water) =dissolved gases+ dissolved solids +pure watersalinity of sea water affects: weight and freezing pointsalinity of sea wate
8、r: 35%o 35%The salinity of the earth s oceans is about 3. 5%.What does this mean?There are about thirty-five grams of dissolved solids and gases in one kilo of water.In winter water in some containers or small rivers often freezes while that in seas not? Can you explain it?1. The salinity of sea wat
9、er can affect the freezing point of water.2. Sea water has a lower a freezing point, so even when the temperature of sea water falls below 0, sea water is still liquid.Paragraph 4.Factors of density: mass and volumeUnit of density: kg/m3= kilogrammes per cubic metreDensity of pure water: 1, 000 kg/m
10、3=one cubic metre of water weighs one thousand kilogrammes When water freezes, its density decreases. If it did not, the oceans would be frozen solid, (paraphrase)What is density?Density is the relationship between mass and volume and is measured in kg/m3, reading kilos per cubic meter . The density
11、 of water is 1,000 kg/m3.Does it also goes for the phenomenon that ice looks larger than water does?Ordered molecular structure of frozen water (ice)Semi-ordered molecular structure of liquid waterWhat do different densities in the ocean result in?Water in the ocean is always moving.What phenomena c
12、an this result help us explain? Please give examples.1 . Ocean motion helps move nutrients around and adds energy to the marine ecosystems.2 .Different marine creatures live in different levels of the ocean. (Because of the foods they need, sunshine etc.)Heat capacity: water temperature substanc ene
13、rgyOpposite word/phrase of absorb: give off change createParagraph 6.How does the water in the ocean move?Dense water sinks and less dense water is pushed to the surface.Paragraph 7.Main idea: significance of water to natureWater, which seems so simple and common, is what makes life possible. Of all
14、 the resources on earth 一一 oil, gas, gold and so on - nothing is as precious as a drop of rain, (paraphrase)Read following statement and think what conclusion you can draw? Or what property does it refer to? It is said that a man of 60kg loses about IL water through breath and skin evaporation (皮肤蒸发
15、)every day. In other words, 539kcal heat is released in these two ways. If so much heat were kept in human body, it would raise body temperature by 9.Can you imagine the result? Water has a relatively high heat capacity and can accommodate the climate automatically. It can absorb and release a lot o
16、f heat without big changes in its temperature, thus creating a stable environment.Here are some more familiar phenomena, what property of water are they related to?1. The coastal areas are often neither too hot nor too cold.2.Ice floats on water.3. When the sea water in a container is evaporated （蒸发
17、）， there will be some salt left.4.Irrigate in winter can help raise the soil temperature.5. People swimming in the Dead Sea float; they can even read a paper while lying on their back in the water.HomeworkTry to think as many examples as possible to show that water is made use of to bring benefit to
18、 human beings.Step 7 Further Understanding and Language Study1. come up with想出（方案、答案等）He couldn t come up with an answer when I asked him why he was e about 发生 come across 偶然遇 come out 出版2. benefit. from 从获益 be of benefit to 对有益3. take advantage of 对加以利用4. make notes of=take notes of 登，己Language poi
19、nts in the text1. incredibly adv. (extremely or unusually)难以置信的 e.g. The water is incredibly hot.2. range vi.range from A to B e.g.Their ages range from 25 to 50.His interests ranged from chess to canoeing.3. all the way始终，一路上，完全4. But the way the water moleculeee. g. I don t like the way (in which/
20、that) he looks at me.They admired the way (in which/that) she dealt with the crisis.5. that is (to say) (which means)e. g. A week later, that is, May 1 is her birthday.也就是说He is a local government administrator, that is,he is a Civil Servant.6. break down v.毁掉，压倒，倒塌，中止，分解7. available adj. (that can
21、be used or obtained)可用的, 可 获得的e. g.Tickets are available at the box office. The book is available to all the students.8. on earth在世界上，到底，究竟9. even though/if 即使尽管Even though he ispoor,she loves him.Even though hes 24 now, he s still like a little child.I can still remember, even though it was so long
22、 ago.10. say 插句中假定，比如“ What would you do if you got, say, a million dollars?11. take advantage of (make use of something welle.g.They took full advantage of the hotel s facilities.12. be sensitive to something (affected easily by something) 对敏感e.g.She is very sensitive to other s words.13. keepstead
23、y 使稳定Important sentences1 .Life in the oceans ranges from the tiniest plankton all the way up to giants like sharks and whales.海洋里有从最小的 浮游植物始终到像鲨鱼和鲸鱼这样的庞然大物。(P1)2 . Water is actually quite simple, but the way the water molecule is formed gives water its unique properties.水实际 上很简洁，但水分子形成的方式给予了水独特的性能。
24、(P2)3 .The nutrients in whatever falls into the ocean will quickly become available to other living creatures.任何落入 海洋里的物质中的养分物都会很快被其他生物所汲取利用的。whatever “无论东西“可引导名词性从句。如You can eatwhatever your like.Whatever is left over is yours.4 .Heat capacity is the amount of energy it takes to raise the temperatu
25、re of a substance one degree centigrade.热容量 是指将一种物质的温度上升一摄氏度所需的能量。It前面省略了关系代词that/which.不定式引导的是真正的主 语5 . The water in the oceans also keeps the temperature of the earth steady by absorbing and giving off heat.由于海水的吸热和释热的作用，从而使地球的温度保持稳定。We should do all we can to protect water from being polluted!Ste
26、p 8 Activity 6. SummaryFeatures of Science Exposition： A. Sentence Structured. Vocabulary:C. Tense:D. Text Structure:INTEGRATING SKILLSTeaching Aims:1. Review modal verbs2. Do some exercises to reviewTeaching Important Points:Review modal verbsTeaching Difficult Points:How to help the students corre
27、ctly use the modal verbsTeaching Methods:1. Review method to help the students remember all the modal verbs2. Individual work or group work to make every student workin class1. Discussion before reading to make the students interested in what they will learn2. Fast reading to get a general idea of t
28、he text3. Discussion after reading to make students understand what they ve learned better4. Careful reading to get the detailed information in the textTeaching Aids:1. the multimedia 2. the blackboardTeaching Procedures:Step 1 Warming upCollect as many words as possible related to water.(Ice ocean
29、lake river rain sweat fish steam)What properties or characteristics do you know about water?(Colorless tasteless odorless three forms absorbing heat dissolving feeling wet)Group work:What property of water does each of the four experimentsTeaching Aids:1. the multimedia 2.the blackboardTeaching Proc
30、edures:READING:NATURE5 S NURSERY: ESTUARIESStep 1 Lead-in2. How much do you know about them? Is the economy there well-developed or not?3. Which city is the most developed? Why?4. Can you tell what map it is? Where is it?5. Is the water here salty or fresh?6. Whats the place where river and the ocea
31、n meet?Step 2 Skimming:Find the definition of an estuaryAn estuary is the body of water where a river meets the ocean. Salt water from the ocean and fresh water from the river mix together in an estuary. This mixing of fresh and salt water creates a unique environment filled with life of all kinds a
32、 zone between the land and sea.What kinds of function of estuaries have been mentioned in the passage?1. Great places for nature s young animals clean our water by absorbing nutrients and pollutants from water coming from inland sources;2. Provide both recreation and education for human beings.Discu
33、ssion:1. What living conditions do you think are needed for natures young ones?2. Do estuaries have such conditions for them?Step 3 ScanningRead the passage and answer the following questions.1. Why are estuaries such good places for nature? s young ones?In estuaries, animals can enjoy all the benef
34、its of the oceans without having to face many of its dangers.Tides provide energy for the ecosystems, but estuaries are protected from waves and storms by islands, mud or sand.Nutrients from both the land and the ocean arrive in estuaries.2. What does density mean in this passage?It means the number
35、 of species per area.3. How do you estuaries affect the water that passes through them?They absorb nutrients and pollutants from water coming inland sources, thus cleaning our water.4. Why are estuaries more sensitive to pollution than other areas?Because estuaries act as filters （过滤器），many pollutan
36、ts end up in them.5. Why are estuaries important to human beings? Estuaries provide both recreation and education for human beings.People can fish, swim and have fun on the beach.Scientists and students have endless opportunities to study a variety of life in the habitat. Estuaries also contribute t
37、o the economy through tourism and fishingFinish the following passage with words from the text.Estuaries are bodies of water along coasts that are formed （形成）when fresh water from rivers flows into and _mixes with salt water from the ocean. In estuaries, the fresh river water is blocked from streami
38、ng into the open ocean by either surrounding mainland, or islands. This mixing of fresh and salt water creates a unique environment filled with life of all kinds -a zone between the land and sea known as an estuary.The estuary gathers and holds a variety of life-giving nutrients from the land and fr
39、om the ocean, forming an ecosystem that contains more creatures than any other habitaton the earth. Estuaries are also important for human beings. They protect water quality by absorbing pollutants from water coming from inland sources. They are centers for entertainment （）肖遣）and education. Estuarie
40、s, in short, are treasures.Step 4 Activity 1. Finding Topic SentencesTopic Sentence of Paragraph: _1Sentence:As the oceans are the source of life on earth, the estuaries are our planets nurseries.Topic Sentence of Paragraph: _2Sentence: Estuaries are great places for natures young onesTopic Sentence
41、 of Paragraph: 3Sentence:Estuaries are also important because they absorb nutrients and pollutants from water coming from inland sources, thus cleaning our water.Topic Sentence of Paragraph: 4Sentence: Estuaries provide both recreation and education for human beings.Provent against/from Stopeeefrom
42、Keep. . fromStep 5 Activity 2. Structure of the passageStep 6 Activity 3. Answering the questionsIWhy are estuaries such good places for natures young ones?2 What does density mean in this passage?3 How do estuaries affect the water that passes through them?4 Why are estuaries more sensitive to poll
43、ution than other areas?5 Why are estuaries important to human beings?Step 7 Activity 4. Word StudyPollutant ： something that pollutes, especially a wastematerialestuary： the body of water where a river meets the oceanrecreation： refreshment of ones mind or body after work through activity that amuse
44、s or stimulatesmammal： warm-blooded vertebrate animalsreproduce： to generate (offspring) by sexual or asexual means.erosion 腐蚀， 侵蚀：the process of eroding or the condition of being erodedStep 8 WritingTip 1 If you are describing a process,1 . You should explain each step in the order it happens.2 .Te
45、ll the readers about the causes and effects and use words like first, second, then, etc to show the order of the steps.FirstSecondThird/ ThenLastTip2If you are writing about something that has several parts, describe each part and explain its function and structure. The following questions may help:
46、1. What is it ? How many parts is it made up of?2. What s the structure of each part? How does it work?3. What? s the function of the thing?Imagine that your science teacher ask you to explain one of the following questions:1. Why does an ice cube float?2. What will happen to a piece of metal if you
47、 put it in water?3. Why do so many species live in estuaries?4. Why have so many cities been built by estuaries?Choose one of the questions and write a passage, using what you know about nature and science and what you have learned from this unit.Step 9 HomeworkChoose one of the questions and write
48、a passage, using what you have learned about water from this unit and new words and sentence structures of this unit as well.文档内容到此结束，欢迎大家下载、修改、丰富并分享给更多有 需要的人。illustrate?What causes this phenomenon?What s this phenomenon related to?ExperimentsExperiment 1 shows how air pressure causes a piece of thick paper to cling to an upturned glass of water.Experiment density behave2