Unit 11

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(3) Look at the pictures and answer the questions.

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(8) Listen to the passage and then find the new words and phrases At present , most of our energy comes from fossil fuels (oil , coal , and natural gas). However , such reserves are limited . Because power demand is increasing very rapidly , fossil fuels will be exhausted within a relatively short time . Therefore , people must develop and use alternative sources of energy. One alternative source is nuclear energy . Nuclear energy can provide enough electricity for the world’s needs for hundreds of years , but it can be very dangerous . Another alternative source of energy is geothermal heat , which comes from deep inside the earth . Scientists use this heat to make energy . However , this energy is available only in a few places in the world. The sun , water , and the wind are other alternative sources of energy . The wind turns windmills and moves sailboats . It is a clean source of energy , and there is lots of it . Unfortunately , If the wind does not blow , there is no wind energy . When water moves from a high place to the lower place , it makes energy . And as dams cost a lot of money , so water energy is expensive. The sun releases large amounts of energy every day . This energy can be changed into electricity . Many countries use solar energy for their daily life . Solar panels on the roofs of houses can create enough energy to heat or cool an entire house . Solar energy is not only plentiful and infinite but also clean and safe. Although there are some disadvantages , the potential of alternative sources of energy is great . However , how to make full use of these sources of energy is a question for researchers all over the world..

(9) I. Vocabulary - fossil fuel / 'fɔsl fjuəl / (nph): nhiªn liÖu ho¸ th¹ch - exhausted / ig'zɔ:stid / (a) : c¹n kiÖt - alternative / ɔ:l'tə:nətiv / (a) : cã thÓ thay thÕ - energy / 'enədʒi / (n) : n¨ng lîng - nuclear energy /'nju:kliə / (nph):n¨ng lîng h¹t nh©n - geothermal heat /,dʒi:ou'θə:məl hi:t /(nph):địa nhiệt - solar energy / 'soulə/ (nph) : n¨ng lîng mÆt trêi - release / ri'li:s / (v). : phãng ra, th¶ ra. - limited / 'limitid / (a) - Make full use of (vph). : cã giíi h¹n : tận dụng triệt để.

(10) Read the passage and then do the tasks that follow At present , most of our energy comes from fossil fuels (oil , coal , and natural gas). However , such reserves are limited . Because power demand is increasing very rapidly , fossil fuels will be exhausted within a relatively short time . Therefore , people must develop and use alternative sources of energy.. II. Practice. One alternative source is nuclear energy . Nuclear energy can provide enough electricity for the world’s needs for hundreds of years , but it can be very dangerous . Another alternative source of energy is geothermal heat , which comes from deep inside the earth . Scientists use this heat to make energy . However , this energy is available only in a few places in the world. The sun , water , and the wind are other alternative sources of energy . The wind turns windmills and moves sailboats . It is a clean source of energy , and there is lots of it . Unfortunately , If the wind does not blow , there is no wind energy . When water moves from a high place to the lower place , it makes energy . And as dams cost a lot of money , so water energy is expensive. The sun releases large amounts of energy every day . This energy can be changed into electricity . Many countries use solar energy for their daily life . Solar panels on the roofs of houses can create enough energy to heat or cool an entire house . Solar energy is not only plentiful and infinite but also clean and safe. Although there are some disadvantages , the potential of alternative sources of energy is great . However , how to make full use of these sources of energy is a question for researchers all over the world..

(11) 1 . Six hundred balloons were ______________ at the ceremony . 2 . They are looking for _______________ methods of making it . 3 . People use ________________ to run machines , heat and cool their homes . 4 . The food in the restaurant is cheap , but the choice is rather_________________ . 5 . Fuel supplies are nearly_________________ ..

(12) Unlimited. Very dangerous..

(13) Plentiful , infinite, clean and safe.. Produced only in daytime.

(14) Clean and safe. Must build dams , so expensive.

(15) Clean and unlimited. No energy when no wind.

(16) Clean, safe. Available only in a few places..

(17) Task 2: Scan the passage and find each source of energy having their advantage(s) and disadvantage(s) Sources of energy. Advantage(s). Disadvantage(s). Geothermal heat Nuclear power. - Clean and safe. - Available only in a few places.. - Unlimited. - Very dangerous.. Wind power. - Clean and unlimited.. - Not available when there is no wind - Must build dams , so expensive. 1 2 3. Water power. 4. - Clean and safe. -Plentiful , infinite, Solar energy clean and safe.. 5. -Produced only in daytime.

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(19) III. Free - practice Complete the summary of the reading passage by filling each blank with a suitable word from the box. We need energy to live and work. Our nature source of (1) ______ is oil . Oil is (2) ____ kind of fossil fuel. The amount of fossil (3) _____ in the world is(4) _____ . Therefore, we must save it, and at the same time, we must fine new source of energy. Geothermal heat and nuclear power are (5) __________ source of energy. They can give us electricity. Other alternative (6) _______ are the sun, waves and water. These source are not only (7)________ and available but also clean and save for the (8) _________ . People should develop and use them more and more in the future..

(20) Homework: - Prepare speaking. - Learn by heart the new words.

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Unit 11

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