UNIT 11 SOURCES OF ENERGY PART B: Speaking I. OBJECTIVES: Aims: - Getting students to give reasons the of using alternative sources of energy and talk about the advantages and disadvantages of alternative sources of energy. Vocabulary: abundant, enormous, plentiful, renewable, convenient, polluted, limited, non-renewable, exhausted Expressions : I think/believe that … Why do you think so? I know it is …. However, it is … Teaching aids: some pictures about the alternative sources of energy II.PROCEDURE T Contents T & S’activities I). WARM UP: (5 minutes) .1. Can you tell me some sources of energy? 2. Which source of energy is the most popular in Vietnam? Is it clean or polluted? Is it limited or unlimited? Is it safe or dangerous? *Suggested answers 1. fossil fuels, solar energy, wind energy, water energy, … 2. Fossil fuels are perhaps the most popular. This kind of energy is polluted and limited. II.Check up:Answer the questions: 1.What is major sources of energy? 2.How many sources of energy are mentioned in the text , and which one  Teacher asks these questions one after another and has students discuss with their partners before giving answers.  Students may discuss the questions with their partners to find out the answers -T calls Ss to bb and Ss answer the questions Teacher sticks the pictures do you think has the most potential? II). PRE-SPEAKING (5 minutes) 1. Wind energy 2. Solar energy Picture A : Solar energ 3. Geothermal energy Picture B : Wind energy 5. Nuclear energy Picture C : Fossil fuel (oil) 4. Fossil fuel (coal) 6. Water gy ener Picture D : Water energy Picture E : Fossil fuel (coal) 7. Fossil fuel (oil) Picture on the board or shows them on the projector. Ask students to match the following words with each picture: Students may discuss the pictures with their partners before giving answers  wind energy Picture B F : Geothermal energy Picture G : Nuclear energ Picture A: Solar energy Picture C fossil fuel (oil) Picture E  water energy Picture D Picture F Picture G  geothermal energy II). WHILE-SPEAKING: (20 - 25 minutes) Task 1:The following statements list some advantages and disadvantages of various sources of energy .Read and tick( THE APPROPRIATE BOX a (  nuclear energy Teacher has students work in pairs reading the information in the table and then discussing the advantages and disadvantages. After that, have some pairs report their work in front of the class. The teacher gives comments if necessary Students work in pairs and then report their answers For advantages) Or D( for disadvantages ) then compare the result with a partner’s .1. Fossil fuels will be exhausted within a relatively short time. 2. Geothermal heat is available only in a few places in the world. 3. If the wind does not blow, there is no wind energy. 4. Water power provides energy without pollution. 5. A nuclear reactor releases radiation which is dangerous to the environment. 6. Solar energy is not only plentiful and unlimited but also clean and safe. 7. It is expensive to build a dam for to the class by reading them aloud.  Teacher should have students practise speaking these words first:  T has students read the example in Task 2 (page 128) then act out and role- play with one or two students. hydroelectricity. Suggested answer: 1. D 2. D 3. D 4. A 5. 5. D 6.A 7. D Task 2: Talk with your friend about the advantages and disadvantages of using each alternative source of energy , using the suggestion from Task 1 *Useful language Enormous Dangerous Plentiful Polluted Available Exhausted Unlimited Limited Renewable Non-renewable Convenient Unsafe  Students practice in pairs: . Model: A. I think / believe that wind power can be an alternative source of energy. B. Why do you think / believe so? A. Because our major sources of energy are running out while the wind is abundant and unlimited. B. I know it is also clean and safe to environment. However, it is not available when there is no wind. A. I think that nuclear power can be an alternative source of energy. B. Why do you think so? A. Because our major sources of energy are running out while the nuclear power is unlimited  Teacher should ask them to pay attention to the expressions:  Have students work in pairs practising the dialogue and changing the sources and using the words given to give the reasons. B. I know it can provide enough electricity for the world’s needs for hundreds of years. However, a nuclear reactor releases radiation which is dangerous to the environment A. I believe that solar energy can be an alternative source of energy. B. Why do you believe so? A. Because our major sources of energy are running out while the sun releases large amount of energy every day . B. I know it is not only plentiful and infinitive but also clean and safe. However, it is only possible during the day time. A. I think that water power can be an alternative source of energy. B. Why do you think so? A. Because our major sources of energy are running out while the wind is unlimited. B. I know water power provides energy without pollution. However, it is expensive to build a dam for hydroelectricity A: I think that more and more people will use the solar energy. B: Why do you think so? A: Because it’s available, unlimited and Teacher has students work in groups to prepare a report on which source they think is the most potential. Then ask the representative of some groups to report to the class. Give comments and correct mistakes where [...]... think so? I know it is … However, it is … necessary Task 3:Express your belief on the increasing use of alternative sources in the future , Using the ideas from Task 2 IV) POST SPEAKING: (5 minutes)  Teacher has each students write a short description of several alternative sources of energy Ask some of them to read their description to the class V) Homework -do all the exercises again and prepare the...easy to use C: But it’s expensive and we can only have it at specific time of the year A: I hope that the progress of science and technology will help to overcome this problem B: That’s right and then we don’t have to worry about the shortage of energy C: And our life will be more comfortable with cheap simple devices run on the solar energy I think that … I . UNIT 11 SOURCES OF ENERGY PART B: Speaking I. OBJECTIVES: Aims: - Getting students to give reasons the of using alternative sources of energy and talk about the. the alternative sources of energy II.PROCEDURE T Contents T & S’activities I). WARM UP: (5 minutes) .1. Can you tell me some sources of energy? 2. Which source of energy is the. perhaps the most popular. This kind of energy is polluted and limited. II.Check up:Answer the questions: 1.What is major sources of energy? 2.How many sources of energy are mentioned in the