Unit 13 The Properties of Water
Teaching goals:
1. Talk about water and the ocean
2. Practice communicative skills
3. Review Modal Verbs
4. Write an explanation paragraph
Teaching Plan: (Six Periods)
1st period: Warming-up and Reading (1)
2nd period: Reading (2)
3rd period: post-reading and Listening (SB)
4th period: Integrating Skills (SB)
5th period: Speaking
6th period: Grammar and Language Study
Period 1 Warming up & Reading (I)
Teaching goals:
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 and protecting water resources.
Important points in teaching:
Words: benefit, available, pure, mass, float, absorb, release, stable, bottom, habitat,
dissolve, property.
Phrases: benefit from, range from… to …., all the way, be made up of, that is,
freezing point, break down, mix with, be measured in, take advantage of,
keep…steady, manage to, be sensitive to, up to.
Structures: whatever…., ….., that is,…..
Teaching procedures:
Step1: Lead in
Read a short poem and guess its name: A letter from _______. (Water)
Dear User,
Shame to you all, the Ignorant,
I am your life
But you seem not to value me
Give me all the respect
For in me is eternal life
If you continue abusing me
Surely, all forms of life will wither away
Have you ever imagined,
Life without me?
I tell you, it will be unbearable
Think twice
For every drop counts...
Qs: 1) What does “Dear user” here refer to?
2) What does it talk to its users?
3) On which planet does it exist? －On the earth, which is also called the water planet.
4) Do you know why it is called “The water planet”?
－Because about three quarters of the earth is covered by water.
Step2: Pair work: Collect as many words as possible related to water. Qs:
How much do you know about water?
Is all water fresh or salty?
Step3: Talk about the properties of water.
1. Pair work
T: Water is around us and inside us. We can’t go without water. Qs:
Why is water so important to living things?
Can you point out some of its properties or characteristics?
Suggested vocabulary:
It's colorless, tasteless, odorless and universal dissolvent.
It feels wet;
It exists in three forms: liquid, solid, gas, and is cycled through the water cycle;
It can absorb a large amount of heat;
It sticks together into beads or drops;
It's part of every living organism on the planet; etc.
2. Group work
Learn more about water’s properties by doing some simple experiments and learn to describe an experiment.
What property of water does each of the four experiments illustrate?
What causes this phenomenon?
What’s this phenomenon related to?
① Experiment 1 shows how air pressure causes a piece of thick paper to cling to an upturned glass of water.
② Experiment 2 illustrates how substances with different density behave when placed in the same container.
③ Experiment 3 is an example of how water dissolves substances and objects.
④ Experiment 4 illustrates some of the differences between salt water and fresh water.
3. T: What other properties of water do you know about?
What causes the following phenomena? Can you explain?
①We can get a lot of nutrients by drinking water and having soup.
②Wood floats on water while iron sinks.
③The coastal areas are often neither too hot nor too cold.
④Why can some living things live at the bottom of the ocean where there is no sunshine?
(If these questions are too difficult) Try asking questions about the properties of water and then give answers to them.
Step4: Pre-reading
Look at the titles in the text below. Do not read the whole text. Pick out the subject of each paragraph. Use the structures below to make six questions related to the subjects.
What is/ are ________?
What does _________ look like?
What are different parts of ______?
What can ________ be compared to?
How does _______ work?
What are some examples of ________?
1. Skim to find the words and phrases which describe the properties of water in the reading text.
2. Scan to Find out some basic facts about life in the oceans.
Life on earth began in the oceans about three billion years ago;
99% of the living space on earth is in the oceans;
There are about five million (known) species in the oceans;
Life in the oceans ranges from tiny plankton to giant whales.
Step5: Homework
1． Read the text carefully and find out the detailed information about water properties.
2． Think as many examples as possible to illustrate water properties.
Period 2 Reading (Ⅱ)
Teaching steps:
I. Revision
T: Yesterday you were required to ask more questions about water’s properties and find out the detailed information about water properties as well. So now let’s have a little quiz about the properties of water.
True of false questions:
1) Water is a liquid at room temperature, and it has a relatively high freezing point.
2) The reason why water can dissolve most substances on earth is that water has high heat capacity.
3) Like all the other substances, water gets smaller (contract) when it freezes.
4) Pure water has a higher freezing point and lighter than salt water.
5) The salinity of the earth’s oceans is about 3.5%.
6) When water freezes, its density increases.
7) Other recourses such as oil, gas, gold etc is as precious as a drop of rain.
(TFFTT FF)
II. While-reading
1. As we all know, Charles Darwin is famous for his “The Origin of Species”. (According to his theory of evolution)
Qs: 1) Was there any life on the earth billions of years ago?
2) If any, what was the original life like at that time?
3) Where did it live? －In the deep blue seas.
4) How does the world take its shape, which is quite different from what it used to be, especially those various organisms? －Billions of years’ natural selection.
2．It is said that 99% of the living space on earth is in the oceans.
Qs: 1) What does this fact result in? －Marine life is incredibly rich and varied.
2) Can you give some specific numbers or examples?
－There are about five million species in the oceans. They range from the tiniest plants all the way up to giants (e.g. 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 medium 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’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 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(毛细管) process;
－We can get a lot of nutrients by drinking soup.
That’s water’s another property－dissolvability.
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? －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 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 does, 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 looks 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 usually 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 examples. (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 and think what conclusion you can draw? Or what property does it refer to?
It is said that a man of 60kg loses about 1L 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 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 of heat without big changes in its temperature, thus creating a stable environment.
8. Here are some more familiar phenomena.
What property 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 temperature. (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. Homework
1. Try to think as many examples as possible to show that water is made use of to bring benefit to human beings.
Period 3 Post-reading & Listening
Teaching goals:
1. To get students have a better understanding of water.
2. To learn some new words and sentence structures.
Teaching procedures:
Part one Post-reading
I. Better understand the properties of water
1. “Where there is water, there is life!” Can you use some facts to illustrate it?
－Water is a medium for life.
So far as we know, life only exists on earth, because there is water. Etc.
2. 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 how 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.
3. Water is the source of life. That’s why water is an excellent medium for life. And you know all this is because of water’s unique properties.
II. Revision on the properties of water
1. 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 properties?
－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 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?
2) What is sea / salt water? － A mixture of pure water, dissolved gases and solids.
3) How does salinity affect water?
4) 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.
5. Salinity also has something to do with the density of water. The higher salinity is, the higher density of water is.
Qs: 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 same density?
－No. Denser water sinks and pushes less dense water to the surface.
6. That’s why the ocean water will never stop moving. Ocean motion
Qs: 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 nutrients 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 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. Reflection
1. There is a close relationship between some properties of water, for example, salinity, density and ocean 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.
2) What affects you.
3) What you are made the most of by human beings.
Part two Listening
I. Pre-listening
Give 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-listening
1. Listen to the story (Part 1) and find the information about it. (When, where, who, what?)
When: 18th century? (No, not mentioned)
Where: on a ship
Who: sailors / mariners
What: One of the sailors kills a bird that brings good luck to the ship, by doing 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 believed 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 and 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 bird.
2) He must _____ _______ it all and will ______ by having to tell the story…
3) _____ ______ on the ship, _________ on the ocean, the mariner suffers from __________ and ______.
4) His story _____, the ________ mariner says _________ and asks them to learn from his ___________.
Keys: 1) except, shot; 2) live through, pay 3) Left alone, drifting, loneliness, fear; 4) told, ancient, farewell, sufferings
5. 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-listening
1. Reflection: What do you learn from this story?
－Everything existing in the world has their own certain values, we should understand and respect them.
2. Creation
Work with partner and try to come up with a good, scary story like the one about the mariner.
Homework
1. Preview Integrating Skills “Nature’s Nursery: Estuaries” on page 22
Period 4 Integrating Skills
Teaching goals:
1. To get students to know what estuaries are and their functions
2. To learn to write an explanation paragraph
Teaching procedures:
I. Lead-in
Look at the map of China, answer these questions:
1. Can you name the three cities marked on the map? Where are they? (Chongqing, Shanghai, Dalian )I
2. How much do you know about them? Is the economy there well-developed or not?
3. 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?
II. While-reading
1. Skimming
1) Find out the definition of estuary.
(An 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 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) Discussion.
What living conditions do you think are needed for nature’s young ones?
Do estuaries have such conditions for them?
2. Discussion
What 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 questions.
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 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 question 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 question 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.
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 salt water 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 -- a zone between the land and sea known as an estuary. The estuary gathers and holds a ______ of life--giving nutrients from the land and from the ocean, forming an ecosystem that contains more creatures than any other ________ on the earth. Estuaries are also important for human beings. They protect water quality by ________ pollutants from water coming from inland sources. They are centers for _______(娱乐) and education. Estuaries, in short, are treasures.
(formed, mixes, creates, filled, variety, habitat, absorbing, entertainment)
III. Post-reading Discussion
As we learn from this passage, many cities which are built around estuaries, like Shanghai, Guangzhou, Ningbo, Shenzhen are very developed. Can you explain why?
( They are near Yangtze River Delta, Pearl River Delta…)
(Convenient transportation, rich resources…)
IV. Writing
Do you still remember what we learn about the properties of water? In that passage, the writer introduces the chemical structure and several properties of water to us, such as salinity, density, heat capacity. So from this we know when we are explaining what something is or how things happen, it is important that our explanations should be well organized and easy to understand.
Tip one
If we are describing a process，we’d better explain each step in the order it happens. Tell the readers about the causes and effects and use words like first, second, then, etc to show the order of the steps.
First…
Second…
Third/ Then…
Last…
Tip two
If we are writing about something that has several parts, we should describe each part and explain its function and structure.
The following questions may help:
What is it? How many parts is it made up of?
What’s the structure of each part? How does it work?
Homework
Imagine that your science teacher ask you to explain one of the following questions:
Why does an ice cube float?
What will happen to a piece of metal if you put it in water?
Why do so many species live in estuaries?
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.
Period 5 Speaking
Teaching aim:
1. Get students to talk about the main use of water in our life and their effects.
2. Draw students’ attention to the importance of using, saving and protecting our water as well.
Teaching procedures:
I. Revision
1) Can you use your own words to tell us the general idea of the two reading passages?
2) What do you learn from our previous classes?
－ Water is necessary / a must to life. Without water, life, as we all know, would not exist.
II. Speaking
1. Pre-speaking
1) Do you agree with the saying “Without water, life would not exist.”?
2) So not only you and I agree with this opinion, but also the United Nations hold the same view. And that’s why we have World Water Day.
Q: Is there anyone who knows when it is? － Mar. 22
3) Brief background information about World Water Day: World Day for Water is established by the United Nations General Assembly's resolution 47/193 of 22 December 1992. It is a unique occasion to remind everybody that concrete efforts to provide clean drinking water and increase awareness world-wide of the problems and of the solutions, can help make the difference.
4) Last year we witnessed some great disasters such as the typhoon “Yunna” and the tsunami in the India Ocean. What a coincidence that the theme for World Water Day 2004 was “Water and Disaster”. World Water Day 2005 will be guided by the upcoming water decade's theme "Water for Life". It will be the starting day for this International Decade for Action, "Water for Life".
2. While-speaking
1) To some extent, the existence of World Water Day also implies that human beings cannot live without water. Why? Can you tell how water is being used in our life? Give some examples.
－electricity, agriculture, home use, industry, transport, entertainment, etc.
2) Look at the first picture (“electricity”) in the textbook and talk about it.
The water is being used to generate electricity. Building up behind a high dam, water accumulates potential energy (势能). This is transformed into mechanical energy when the water rushes down. It is a good way to use water because water is renewable green energy. It will never run out if only we use it properly and generating electricity by using water is a better way to protect the environment than others. However, it takes a great sum of money and a long period of time to build a dam and prepare all the required equipment. Since nowadays electricity has already been an indispensable part of our life, most people benefit from using water in this way.
3) Group work. Divide students into several groups with six in each. Each one takes charge of one picture. When discussing each picture, please think about the following questions:
How is water being used?
What property of water enables it to be used in this way?
Why do we use water in this way?
Who benefits from using water in this way?
Is this a good way to use water?
What are some disadvantages of using water in this way?
4) Pair work. Each six-member group can be divided into three smaller ones with two in each. Make a dialogue on the basis of the results about your topics we reach, using following useful expressions:
The water is being used to / for … We should / could …
What will we do if …? If we …, we can …
It would be better to … Can you think of a better way?
3. Post-speaking
1) Just now we’ve talked about six main ways of using water and their disadvantages as well as advantages. Here I have something more for you.
① Read following short passage by yourself.
No matter who we are, where we are, or what we do, we are all dependent on water. It is the source of all life and we need it every day. But with the world's growing population and fast developing economies, the earth's water reserves are drying up fast.
As many as 7 billion people throughout the world could face a water shortage by 2050 if the present situation continues. By then, the global population is expected to reach 9.3 billion. Many big cities, including Beijing, Shanghai and Tianjin, will suffer severe water shortages.
This alarming situation was shown in a United Nations (UN) report just ahead of World Water Day, which falls on March 22.
② Watch a flash “A prediction for water”
2) Q: What information have you got from the passage and flash?
－Water is very important to each of us. We must try our best to save and protect our precious water; otherwise, we will suffer a lot and even bring disasters upon ourselves.
3) Q: How can we save and protect water in our daily life?
Take home use for example,
Reduce faucet flow. Avoid letting the water run when brushing teeth, washing dishes, and shaving etc.
Reduce shower flow. Install a water-efficient shower head and spend 2 minutes less in the shower.
Replace aging toilets and clothes washers with high efficiency models. Take advantage of City rebates offered for low-flow and Wash Wise models.
Repair leaks. Find and fix faucet and toilet leaks.
Use natural lawn & garden care practices. Dig compost into soil to increase water retention and apply mulch around plants to avoid evaporation.
Reduce outdoor water use. Use a commercial car wash that recycles water. Sweep the driveway instead of hosing it off.
We ourselves should have a strong sense of preserving water and tell others to protect it too.
Start from the little things right under our noses. For example, don’t litter or pour rubbish into rivers at will.
Avoid cutting down trees especially where the source of river lies.
…
4) Enjoy a flash about saving water. For the second time, we may turn off the sound and let students dub it in English if possible.
4. Homework
Read the requirements in Talking (P.96) and finish it in the form of report.
Period 6 Grammar and Word Study
Teaching Goals:
◆ To review Modal verbs.
◆ To make students get more familiar with the Modal and practise using them in different situations.
◆ To enable students to master some new words and expressions.
Teaching Procedures:
Part One: GRAMMAR - MODAL VERBS
I. Revision
We have talked about the properties of water and we know that water can be used in many ways due to these properties. So please answer the following questions.
1) What are these properties of water?
2) Can you give some more examples that show we can benefit from these properties of water?
According to the above discussion, we know that these properties of water are very important and help us a lot. Just because of these properties of water, water can meet people’s needs of living on the earth. We can say that water is the “life food” of the earth. It is a necessity of human beings and all the other living things. However, have you ever imagined the following situations?
II. Presentation
3) Without ocean motion, what would the earth be like?
(Without ocean motion, the earth would…)
4) If the density of ice were larger than that of water, what would the seabed be like?
(If the density of ice were larger than that of water, the seabed would…)
5) Suppose water had a much lower freezing point, what would the world be like?
(Suppose water had a much lower freezing point, the world would…)
III. Try to list some modal verbs according to their functions.
Possibility Certainty
Ability Permission
Request Suggestions
Necessity Advice
IV. More situations given to practice using Modal Verbs.
Situation one:
As many as 7 billion people throughout the world could face a water shortage by 2050 if the present situation continues. By then, the global population is expected to reach 9.3 billion. Many big cities, including Beijing, Shanghai and Tianjin, will suffer severe water shortages.
1) If it is true, what may happen in the future?
2) What can our country do with this problem?
3) What should we do in our daily life?
Situation two:
Three Gorges Project is the largest water conservancy project ever built in the water. It is said that the whole project will be completed in the year 2009 as planned. So try to discuss the following questions:
1) If the project is completed in the year 2009, what advantages will it bring to us?
2) If the project is completed in the year 2009, what problems may it cause? How can we deal with these problems? What should we do to solve these problems?
V. Consolidation
1. Fill in the blanks with the proper modal verbs.
will would can could must should may might
Dear John,
Thank you for your letter. I don’t think I ________ give you any advice. I don’t think the manager ______ trust you. It sounds as if he has decided that you ______ be the thief. Do you have to continue working at this company? Maybe you ______ find another job where the people are more friendly. I think that you ________ enjoy that more.
If you stay at the meat factory, you __________ not be able to be happy. Besides, if you stay, the thief _______ do something bad to you. I don’t think that _______ be very pleasant. If he played a bad trick on you, the manage __________ say you were the thief and call in the police. That _________ have serious results. I think the best thing you _________ do now is to look for another job and hope that it __________ turn out better.
Yours,
Mary
2. Finish all the grammar exercises on SB & WB.
Part Two: Word Study
I. The letters of the following words have been mixed up. Try to put the letters in the correct order.
1. otmas 11. sag
2. satlbe 12. nhroygde
3. sdlio 13. yoxgen
4. oasbrb 14. duiliq
5. eeefrz 15. fatol
6. shiplareotin 16. ttaaibh
7. labeiaav 17. aaccpiyt
8. siendyt 18. sseeiintv
9. orperpyt 19. ssloveid
10. tionrcerea 20. uerp
II. Try to find words in this unit according to the explanations
1. ____________ （of things）that can be used or obtained.
2. ____________ not mixed with any other substance.
3. ____________ special quality or characteristic of a substance, etc.
4. ____________ change a solid into liquid.
5. ____________ stay on or at the surface of a liquid and not sink.
6. ____________ ability to hold or contain sth.
7. ____________ affected greatly or easily by sth.
8. ___________ natural environment of an animal or a plant; home.
9. ____________ (means of ) refreshing or entertaining oneself after work; relaxation.
10. ____________ the relationship between mass and volume and is measured in kilos per cubic.
III. Fill in the blanks with the proper words. The first letter has been given. Some words are used more than once.
1) The water molecule is made up of two h__________ atoms and one o__________ atom.
2) Water is a l________ at room temperature, but it turns into a s________ when the temperature drops below 0C and into a g____ when heated above 100C.
3) An a________ is the smallest part of any living or nonliving thing.
4) Places by the sea often have a s___________ climate that is never too hot or too cold, because water can a________ and release a lot of heat.
5) Soil can a________ water, so it helps keep water from flowing away.
6) Marine scientists study the r___________ between living creatures and their habitat in the ocean.
7) Salt water has a lower f_________ point and is heavier than fresh water.
8) Oil has a density lower than 1,000 kg/m3, so it will f__________ on water.
9) Heat d________ the candle into a pool of wax in a few minutes.
10) Now nobody can be sure any longer that the air in the countryside is p________ and healthy.
IV. Complete the following sentences with the proper forms of the following phrases.
1. Temperature here__________10°C to 30°C.
2. A volleyball team consists of Six players while a football team ______eleven players.
3. He is a hero, so you will ___________ his good example.
4. You can ___________ her offer to drive you home.
5. The talks between those two big companies ____________ so the two managers had to look for another trade partner respectively.
6. The engine of the ship was out of order and the bad weather ___________ the helplessness of the crew at sea.
7. It’s now twenty minutes past four, _________, the doctor has gone for two hours.
8. Uncle Smith followed him _______ down the street.
9. The powder is then ________ water and other things, and made into different kinds of food.
10. The chairman encouraged everyone to __________ the discussion.
Homework
1. Finish all the grammar exercises on SB&WB.
2. Review the whole unit.
(浙江省温岭中学英语组：江依丽，马君，林中华，夏静玲)