bài giảng tiếng anh 11 unit 11 sources of energy

One alternative source is nuclear energy.. Another alternative source of energy is geothermal heat, which comes from deep inside the earth.. The sun, water, and the wind are other alter

1.What source of energy does each

picture above refer to?

2 What do we need energy for?

-> We need energy to cook meals, to light, heat or cool the house and to run machines…

Oil, petrol, coal and gas are fossil fuels

fossil fuels: nhiên liệu hoá thạch

- Limit / ˈlɪmɪt/ (v) :to restrict or reduce the amount of something that you or somebody can have or use.

- Limit (n) : a point at which something stops being possible or existing

Ex:There is a limit to the water we can use

- Limited /ˈlɪmɪtɪd /(adj): not very great in amount or extent: có hạn

Ex: Our natural sources of energy are limited

- Limitation / ˌlɪmɪˈteɪʃn/ (n): the act or process of

limiting or controlling somebody/something

Is there a limit to the amount of the natural sources of energy ?

Are our natural sources of energy limited or unlimited ?

Hydroelectric dam: Đập thủy điện

/ˌhaɪdrəʊɪˈlektrɪk/ /dæm/

- Electric /ɪˈlektrɪk/ (adj) : connected with

electricity;using or produce electricity (liên quan đến điện.

- Electrical /ɪˈlektrɪkl/ (adj)

- Electrically /ɪˈlektrɪkli/ (adv)

- Electrician /ɪˌlekˈtrɪʃn/ (n) :a person whose job is

to connect, repair, etc electrical equipment

- Electricity /ɪˌlekˈtrɪsəti / (n) : điện,điện lực.

Ex: Her electricity was cut off when she didn’t pay her bill.

Do we need to save electricity?

What do we do to save electricity?

Solar panel: Tấm thu năng lượng mặt trời

/ˈsəʊlə(r)/ /ˈpænl/

Nuclear :

nuclear reactors

nuclear bomb

Nguyên tử /ˈnjuːkliə(r)/

geothermal heat : Địa nhiệt

/ˌdʒiːəʊˈθɜːml/ /hiːt/

- Release /rɪˈliːs/ (v) : let sb/sth free (phóng thích)

Ex: Large amounts of energy are released by the sun everyday.

- Release (n) : sự phóng thích,sự giải phóng

1 fossil fuels (n): 5 Windmill

2.limit (v) 6 Solar panel

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.

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

How many sources of energy are mentioned in the text? What are they?

Task 1

Find out in the text the words which means:

1 energy obtained from the power of the sun, wind, water:

limit

energy

exhausted

TASK 2 : Scan the passage and write down the advantage (s) and disadvantage (s) of each alternative source of energy.

Sources of energy Advantage(s) Disadvantage(s)

Nuclear power

Geothermal heat

Wind power

Water power

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.

It’s plentiful It can be very

dangerous available in only a few places

It is available

Paragraph 3

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 a lower place, it makes energy This energy is

used to create electricity Water power gives energy without

pollution However, people have to build dams to use this energy And dams cost a lot of money, so water energy is expensive.

It’s clean, plentiful, infinite

expensive

Sources of

Nuclear power It’s plentiful It can be very

dangerous

Geothermal heat It is available available in only

a few places

Wind power It’s clean, plentiful,

infinite If the wind does not blow, there is no

Task 3: Read the passage and then decide

whether the statements are true (T) or false (F).

1 Our major source of energy comes from fossil

fuels

2 The sun gives out large amounts of energy every

day

3 Solar energy is plentiful, finite, ,unclear,unsafe

4 The potential of alternative sources of energy

SOURCES OF ENERGY

1

ALTERNATIVE SOURCES

wind power

gas coal

FOSSIL FUElS

nuclear power

geothermal

heat

water power

Task 4: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 major 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 find new sources of energy Geothermal heat and nuclear power are (5) …… sources of energy They can give us

electricity Other alternative (6)………are the sun, waves and water These sources are not only (7)……… and

available but also clean and safe for the (8)……… People should develop and use them more and more in the

-Learn by heart the new words -Read the text again.