UNIT 11
SOURCES OF ENERGY
READING
Before you read


Vocabulary
Hóa thạch
Fossil fuel
Làm cạn kiệt
Nguồn dự trữ
Cạn kiệt
exhaust
Mới, thay thế
geothermal
Năng lượng hạt nhân
alternatively
Solar panel
Năng lượng mặt trời
Về điện, liên quan tới điện
Electric
Electrician
Điện
release
Phóng thích
Thuyền buồm
heat
Hơi nóng, sức nóng
Windmill
Năng lượng
Không giới hạn, vô tận
limited
entirely
Toàn bộ
Tiềm tàng, tiềm ẩn
potential
Sự giới hạn
While you read
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 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 move 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.
Task 1
Six hundred balloons were………………at the ceremony
They are looking for……………methods of making it.
People use………..to run machines, heat and cool their homes.
The food in the restaurant is cheap, but the choice is rather…………..
Fuel supplies are nearly…………..
alternative
limited
energy
released
exhausted
Task 2
unlimited
Very dangerous
Plentiful, infinite, clean and safe
Only possible during sunny days
Clean and unlimited
expensive
Clean and unlimited
Just use when the wind blows
It’s available
Only possible in few places
1. What is our major sources of energy?
 It fossil fuels.
2. How many sources of energy are mentioned in the text? Which one do you think has the most potential?
 5 sources energy: nuclear energy, geothermal heat, solar energy, wind power and water power.
 It nuclear energy. Because it can provide electricity for the world’s needs for hundreds of years
Task 3
After you read
We need energy to live and work. Our major sources of………… is oil. Oil is…….kind of fossil fuel. The amount of fossil………in the world is…………... Therefore, we must save it, and at the same time, we must find new sources of energy. Geothermal heat and nuclear power are……………sources of energy. They can give us electricity. Other alternative…………………are the sun, waves and water. These sources are not only………………and available but also clean and safe for the……………………………………People should develop and use them more and more in the future.
one
environment
alternative
limited
unlimited
sources
energy
fuels