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1、teaching plan for unit 13(人教版高二英语下册教案教学设计)Teaching goals:1. Talk about water and the ocean2. Practice communicative skills3. Review Modal Verbs4. Write an explanation paragraphTeaching Plan: (Six Periods)1st period: Warming-up and Reading (1)2nd period: Reading (2)3rd period: post-reading and Listen
2、ing (SB)4th period: Integrating Skills (SB)5th period: Speaking6th period: Grammar and Language StudyPeriod 1 Warming up Reading (I)Teaching goals: sharks and whales).3) What does this fact imply? Do you agree?Water is an excellent medium for life.4) Why do you agree that water is an excellent mediu
3、m for life? (Based on common knowledge)Water is a liquid at room temperature and has a relatively high freezing point;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.3. So we know that one of water
4、? s properties is its dissolvability (溶解性).Qs: 1) Do you know what gives water such a unique property?The chemical structure of water.2) What does the water molecule look like?A water molecule consists of two hydrogen atoms and one oxygen atom. The two hydrogen atoms are bonded to one oxygen atom to
5、 form a V shape. The two hydrogen atoms form a polar molecule, that is, one with a slightly positive end and one with a slightly negative end.3) Can you give some other examples which are also resulted from water s unique chemical structure?Plants can pull water up their roots via a capillary(毛 2田管)
6、process;We can get a lot of nutrients by drinking soup.That s water? s another propertydissolvability.4. Since water is such a universal solvent, it can dissolve just about anything including many gases and solids. As a result, there is sea water.Qs: 1) Do you know the salinity of the earth s oceans
7、? about 3. 5%.2) What does it mean?3) Have you ever noticed such a phenomenon that in winter water in some containers or small rivers often freezes while that in seas not? Can you explain it?The salinity of sea water can affect the freezing point of water. Sea water has a lower a freezing point, so
8、even when the temperature of sea water falls below 0, sea water is still liquid.5. However, no matter whether it is sea water or pure water, “wood floats on water while iron sinks” always works. How do you explain that? What property of water is this?- If a substance has a lower density than water d
9、oes, it will float on water; Otherwise, it will sink.Qs: 1) What is density? And what s the density of pure water?Density is the relationship between mass and volume and is measured in kilos per cubic meter (kg/m3). The density of water is 1, 000kg/m3.2) Does it also go for the phenomenon that Ice l
10、ooks larger than water of equal mass?Yes. Water s density decreases when it turns to ice, so its volume increases.3) Does all the water in the same river or ocean have equal density? Tell your reasons.-No. Changes in salinity and temperature affect water s density. Cold water of high salinity usuall
11、y is most dense and will tend to sink to the bottom of the ocean.6. Qs: 1) What do different densities in the ocean result in?Dense water sinks and less dense water is pushed to the surface. Thus water in the ocean is always moving.2) What phenomena can this result help us explain? Please give examp
12、les. (If necessary, give students some hints such as showing a picture etc.)Ocean motion helps move nutrients around and adds energy to the marine ecosystems.Different marine creatures live in different levels of the ocean. (Because of the foods they need, sunshine etc.)7. Read following statement a
13、nd 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)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 te
14、mperature 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 of heat without big changes in its temperature, thus creating a stable environment.8. Here are some more familiar phenomena.What proper
15、ty of water is each of them related to?The coastal areas are often neither too hot nor too cold. (Water s high heat capacity)Ice floats on water. (Density)When the sea water in a container is evaporated (蒸发)， there will be some salt left. (Dissolvability)Irrigate in winter can help raise the soil te
16、mperature. (Water s high heat capacity)People swimming in the Dead Sea float; they can even read a paper while lying on their back in the water, (salinity and density)IV. Homework1. Try to think as many examples as possible to show that water is made use of to bring benefit to human beings.Period 3
17、Post-reading ListeningTeaching goals:2. To get students have a better understanding of water.3. To learn some new words and sentence structures.Teaching procedures :Part one Post-reading1. Better understand the properties of water2. Where there is water, there is life! ” Can you use some facts to il
18、lustrate it?Water is a medium for life.So far as we know, life only exists on earth, because there is water. Etc.3. Our planet is a water planet of which two thirds of its surface is covered by water. What s more, our body is also mainly composed of water. Do you know following figures which show ho
19、w much water there is in parts of our body? 60%, 70%, 82%, 90%Up to of the human body is water.of the brain is composed of water.blood is made up of water.The lungs are nearly water.4. Water is the source of life. That s why water is an excellent medium for life. And you know al 1 this is because of
20、 waters unique properties.II. Revision on the properties of water1. What are the properties of water?Water is polar.Water is liquid at room temperature.Water has a relatively high freezing point.Water has density 1, 000 kg/m3.Water has high heat capacity.2. What causes water to have such unique prop
21、erties? It s molecule form / chemical structure.3. What is water molecule like?Chemical structure: two hydrogen atoms and one oxygen atom.Different parts of it: a slightly positive end and a slightly negative end, so it is polar.The function of it: it causes water to be able to dissolve both solids
22、and gases, and that s why water can break down nutrients quickly.4. Do pure water and salt water have the same chemical structure? Does pure water have salinity?Qs: 1) What? s salinity?5. What is sea / salt water? A mixture of pure water, dissolved gases and solids.6. How does salinity affect water?
23、7. How does it affect water s weight and freezing point? The higher salinity water has, the heavier the water is.The higher salinity is, the lower the freezing point of water is.8. Salinity also has something to do with the density of water. The higher salinity is, the higher density of water is.Qs:
24、 1) What is density?2) How is density measured?3) Which is denser, water or oil?4) What will happen when water and oil are in the same container? What does this phenomenon illustrate?Oil floats on water. A less dense substance floats on a denser substance.5) Does water in the same ocean have the sam
25、e density?No. Denser water sinks and pushes less dense water to thesurface.6) That s why the ocean water will never stop moving. Ocean motionQs: 1) What does ocean motion mean?2) How does ocean motion work?Denser water sinks and pushes less dense water to the surface.Ocean motion helps move nutrient
26、s around and adds energy to the marine ecosystems.3) What causes ocean motion?Changes in salinity and temperature.7. The temperature of the ocean water always keeps steady, making the ocean a safe and comfortable habitat. Do you know why?Water has a relatively high heat capacity.Qs: 1) What is heat
27、capacity?2) What s the function of heat capacity? It determines how a substance absorbs and releases heat;It keeps water temperature steady;It keeps the earth s temperature steady.III. Reflection1) There is a close relationship between some properties of water, for example, salinity, density and oce
28、an motion. How do they affect each other?2) Suppose you are one of the main properties of water (resolvability, salinity, density ). You think you are the most important and have the greatest effect on life. Try to persuade others by describing: 1) What you are.3) What affects you.4) What you are ma
29、de the most of by human beings.Part two ListeningI. Pre-listeningGive a very brief introduction of The Rime of the Ancient Mariner and its author Samuel Taylor Coleridge. Here rime is the variant of rhyme.II. While-listening1. Listen to the story (Part 1) and find the information about it. (When, wh
30、ere, who, what?)When: 18th century? (No, not mentioned)1. To get the Ss to understand the main properties of water by connecting them with some common phenomena and learning to explain the phenomena.2. To enable them to be aware of the importance of water, making good use of water in a proper way an
31、d protecting water resources.Important points in teaching:Words: benefit, available, pure, mass, float, absorb, release, stable, bottom, habitat,dissolve, property.Phrases: benefit from, range fromto . , all the way, be made up of, that is,freezing point, break down, mix with, be measured in, take a
32、dvantage of,keepsteady, manage to, be sensitive to, up to.Structures: whatever*., , that is, Teaching procedures:Stepl: Lead inRead a short poem and guess its name: A letter from.Where: on a shipWho: sailors / marinersWhat: One of the sailors kills a bird that brings good luck to the ship, by doing
33、which he has brought bad luck and death to the sailors.2. Listen to part 1 for the second time and finish the following true or false questions.1) This poem was written by a British poet Samuel Taylor Coleridge in the 1700s.2) In the poem, one of the sailors kills a fish under the ship.3) It is beli
34、eved that the animal he kills is one that brings good luck to the ship.4) Other sailors are so frightened and angry that they kill the sailor.5) The sailors are extremely thirsty but they can t drink the water in the sea, because it is too dirty.(Keys: TFTFF)3. Listen to part 1 for the third time an
35、d answer the following questions:1) Who tells the story in the poem?2) What does one of the sailors do?3) What do you think will happen next?4) Why are the other sailors frightened?4. Listen to part 2 and complete the following sentences.1) Finally they decide that he must die the mariner who the bi
36、rd.2) He must it all and will by havingto tell the story*3)on the ship,on the ocean, the mariner suffers from and.4) His story, the mariner says andasks them to learn from his.Keys: 1) except, shot; 2) live through, pay 3) Left alone, drifting, loneliness, fear; 4) told, ancient, farewell, suffering
37、s5. Listen to part 2 again and answer the following questions:1) What happens to the sailors?2) What happens to the mariner?3) Why is the person telling the story?4) Who is the person actually?II. While-listening1. Reflection: What do you learn from this story?Everything existing in the world has th
38、eir own certain values, we should understand and respect them.2. CreationWork with partner and try to come up with a good, scary story like the one about the mariner.Homework1. Preview Integrating Skills “Nature s Nursery: Estuaries” on page 22Period 4 Integrating SkillsTeaching goals:2. To get stud
39、ents to know what estuaries are and their functions3. To learn to write an explanation paragraphTeaching procedures :1. Lead-inLook at the map of China, answer these questions:2. Can you name the three cities marked on the map? Where are they? (Chongqing, Shanghai, Dalian ) I3. How much do you know
40、about them? Is the economy there well-developed or not?4. Which city is the most developed? Why?Now let s look at this map and then answer the following questions:1. Can you tell what map it is? Where is it?2. Is the water here salty or fresh?3. What s the place called where river and the ocean meet
41、?II. While-reading1. Skimming1) Find out the definition of estuary.(An estuary is the body of water where a river meets theocean. 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
42、all kindsa zone between the land and sea.)2) What functions of estuaries have been mentioned in the passage?(Great places for nature s young animals clean our water by absorbing nutrients and pollutants from water coming from inland sources ; provide both recreation and education for human beings.)3
43、) Discussion.What living conditions do you think are needed for nature s young ones?Do estuaries have such conditions for them?2. DiscussionWhat living conditions do you think are needed for nature s young ones?Do estuaries have such conditions for them?3. Scan the passage and answer the following q
44、uestions.Why are estuaries such good places for nature s young ones?What does “density” mean in this passage?How do estuaries affect the water that passes through them?Why are estuaries more sensitive to pollution than other areas?Why are estuaries important to human beings?(Answer to question 1) In
45、 estuaries, animals can enjoy all the benefits 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.(Answer to quest
46、ion 2) It means the degree to which an area is filled with things or people.(Answer to question 3) They absorb nutrients and pollutants from water coming inland sources, thus cleaning our water.(Answer to question 4) Because estuaries act as filters(过 滤器)，many pollutants end up in them.(Answer to qu
47、estion 5) Estuaries provide both recreation and education for human beings. For example, 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 to the economy through tourism and fishing
48、.4. Finish the following passage with words from the text.Estuaries are bodies of water along coasts that are(形成)when fresh water from rivers with saltwater from the ocean. In estuaries, the fresh river water is blocked from streaming into the open ocean by either surrounding mainland, or islands. This mixing of fresh and salt water a unique environment with life of all kinds一一 a zone