A. Oil
B. Solar energy
C. Electricity
D. Gas
E. Wind energy
MATCHING
1
2
3
4
5
Unit 11:

SOURCES OF ENERGY
READING
< p1 >
Before you read
Work with a partner . Answer the following questions
1. What source of energy does each picture refer to?
wind
water
nuclear
solar
Before you read
Work with a partner . Answer the following questions
1.What source of energy does each picture above refer to ?
2.What do we need energy for ?
They are wind , water , nuclear and solar energy .
We need energy for providing
electricity.
VOCABULARY
Nuclear:
nuclear reactors
nuclear bomb
Nguyên tử
geothermal heat:
Địa nhiệt
Oil, petrol, coal and gas are fossil fuels
fossil fuels:
nhiên liệu hoá thạch
Dam:
Đập thủy điện
SOLAR PANELS
Windmill
sailboats
VOCABULARY
- energy [`enədʒi] (n) = power [`pauə] (n):
- reserve [ri`zə:v]: sự dự trữ
- fossil fuel [`fɔsl] [fjuəl] (n): ?
- exhausted [ig`zɔ:stid](adj): = empty
- nuclear [`nju:kliə] (adj): ?
- geothermal heat [,dʒi:ou`θə:məl hi:t] (n) ?
- release [ri`li:s]: thải ra, phóng ra


VOCABULARY
- plentiful [`plentifəl] (adj): = a lot of
- infinite [`infinət] (adj) = unlimited (adj)
- potential [pə`ten∫l] (n/adj): tiềm năng, có tiềm năng
- alternative [ɔ:l`tə:nətiv] (adj): other/ replace
- 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 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.
Read the passage and then do the tasks that follow
While you read
Activity 1: Vocabulary.
Find out in the text the words which means:
1. energy obtained from the power of the sun, wind, water:
2. to give out:
3. With end:
4. power:
5. use until it is completely finished:

alternative
release
limit
energy
exhausted
Activity 2- task 1: The words in the box all appear in the passage.
Fill each blank with a suitable word.(Use a dictionary when necessary)
alternative
limited
energy
released
exhausted
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_________________ .
Sources of energy
___1___ fuels
coal
---2---
---3 ---
---4--- sources
Solar energy
__5__ energy
__6__ power
__7__ energy
Geothermal ____8___
advantages
disadvantages
Activity 3: Complete the graph

- Learn by heart all the new words.
- Finish task 2, task 3 in the textbook.
Homework:
Thank you for your attention!