WELCOME TO OUR CLASS
UNIT 11: SOURCES OF ENERGY
PART A - READING
BEFORE-YOU READ
What source of energy does each picture above refer to?

wind energy
solar energy
water power
Nuclear power
What can you see in the pictures?
windmill
Solar panels
Nuclear reactors
Hydroelectric dam
What do people use those things for?
They use them to make energy.

1
2
3
4
What do you need energy for?

We need energy for every daily activities.
VOCABULARY
Sailboat
/ˈseɪl.bəʊt/
Windmill  /ˈwɪnd.mɪl/
SOLAR PANELS  /ˌsəʊ.lə ˈpæn.əl/
Hydroelectric dam  /ˌhaɪ.drəʊ.ɪˈlek.trɪk dæm /
nuclear reactors
nuclear bomb
Nuclear  /ˈnjuː.klɪər/
Oil, petrol, coal and gas are fossil fuels
fossil fuels /ˈfɒs.əl ˌfjʊəl/
VOCABULARY
energy [`enədʒi] (n)
= power [`pauə] (n):
reserve [ri`zə:v]:
fossil fuel [`fɔsl fjuəl] (n):
exhausted [ig`zɔ:stid](adj):
nuclear [`nju:kliə] (adj):
geothermal heat
[,dʒi:ou`θə:məl hi:t] (n)
release [ri`li:s]:
plentiful [`plentifəl] (adj):
infinite [`infinət] (adj)
= unlimited (adj):
potential [pə`ten∫l] (n / adj):
alternative [ɔ:l`tə:nətiv] (adj)
to make use of: sử dụng
to make full use of: tận dụng
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 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 as dams cost a lot of money, 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.

alternative - limited - energy- released - exhausted

TASK 1: Fill each blank with a suitable word.
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 _________
released
alternative
energy
limited
exhausted
TASK 2: Scan the passage and write down the advantage (s) and disadvantage (s) of each alternative source of energy.
Paragraph 2
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.
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
If the wind does not blows, there is no wind energy.
It’s clean, plentiful, infinite
expensive
Paragraph 4
…The sun releases a large amount of energy every day. This energy can be changed into electricity. Many countries use solar energy for every day 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.
plentiful, infinite,
clean and safe

It’s only possible during the day / when it’s sunny
TASK 2: Scan the passage and write down the advantage (s) and disadvantage (s) of each alternative source of energy.
TASK 3: Answer the questions
1. What is our major source of energy ?
=> Our major source of energy comes from fossil fuels.
2. How many sources of energy are mentioned in the text, and which source of energy do you think has the most potential?
=>Six sources of energy are mentioned in the text. They are : Fossil fuels, Nuclear power , Solar energy , Water power , Wind power, and Geothermal heat.
Which source of energy do you think has the most potential?
I think solar energy is the most potential.
SOURCES OF ENERGY
1
ALTERNATIVE
SOURCES
oil
3
2
4
5
6
solar
energy
wind power
gas
coal
FOSSIL FUElS
nuclear
power
geothermal
heat
water
power
Homework
Learn new words by heart.
2. Prepare Part C: LISTENING