2. 1. WARM UP:
* Activity 1: watch the video and list some sources
of energy in this video
3. List some sources of energy you have seen :
- Electrical energy
- Heat energy
- Muscular energy
- Solar energy
- Hydel energy
- Wind energy
4. * Activity 2: Answer the following questions:
1. What sources of energy do you know ?
2. What do you need energy for ?
There are a lot of different sources of energy such as:
electrical , light , muscular , chemical, geothermal
energy and some natural energy as solar, wind, water
energy and so on…
We need energy to live and work, to
cook meals, to light, heat or cool the
house, to run machines...
6. 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 will be
exhausted within a relatively short time. Therefore, people must develop and use alternative
sources of energy
One alternative sources 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 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
Listen to the tape:
7. 2. VOCABULARY:
Oil, coal, natural gas are….…..- fossil fuel ['f slɔ fjuəl ] (n)
= power
nhiên liệu hóa thạch
- energy ['enəd iʒ ] (n) năng lượng
sự dự trữ- reserve [ri'zə:v] (n)
eg: We have only 45 minutes for this lesson
We have……….time for it
- limited [limitid] (adj) hạn chế
= run out of- exhaust [ig'z :stɔ ] (v) cạn kiệt
that can be used instead of something else
thay thế
- alternative[ :l'tə:nətivɔ ] (n)
địa nhiệt- geothermal heat [,d i:ou'θə:məlʒ hi:t] (n)
- release [ri'li:s] (v) thải, thả
fossil fuels
8. * Checking vocabulary: Fill in 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……………..
6. Coal, petrol, oil, gas are………………………..
7. Our company doesn’t have a great ………………of capital
8. ………………...........is the thing inside the earth that people use to make energy
alternative limited energy
releasedexhausted fossil fuels
geothermal heat
reserve
9. 3. TASK 1: Write down the advantage(s) and
disadvantage(s) of each alternative sources of energy
Source of energy Advantages Disadvantages
1. Nuclear power
2. Geothermal heat
3. Solar energy
4. Wind power
5. Water power
10. 1. Nuclear
power
Advantage(s) Disadvantage(s)
-It’s unlimited
- It had more 40
years ago and
created a big
source of
energy ( 500
million KW in
a factory in
2000)
-It’s can be dangerous
- Production needs to
have modern technique,
a lot of money, safe
methods
-It’s a dangerous type
of weapon in wars
12. 3. Solar
energy
Advantage(s) Disadvantage(s)
- It’s clean, safe,
infinite
-It’s cheap
-It is renewable,
unlimited
-It is used in branch
of aeronautics,
missile, motor car,
metallurgy, chemicals
-It shows changing
between the day and
the night
-It’s only during
the day time
-It can destroy our
environment if it’s
abundant
(appearance of dry
seasons)
13. 4.Wind power Advantage(s) Disadvantage(s)
-It’s clean,
unlimited
-It can be used to
create electricity
( Phong Dien I –
Binh Thuan factory
with 30 MV)
- If the wind
doesn’t blow,
there is no wind
energy
- In some deep
areas, If there is
not wind, the rain
may not have
14. 5.Water
power
Advantage(s) Disadvantage(s)
- It is expensive
- It’s polluted,
exhausted in some
countries (1.3 billion
people lack of fresh
water )
- If it has more, It can
cause the flood
-It’s clean,
unlimited
( Vietnam
accounts for 1.4
amount of
water in the
world)
15. 4. TASK 2: Answer the following questions :
1.What is the major source of energy ?
2.Are fossil fuels limited ? Why/ why not ?
3.How many sources of energy are mentioned in
the text, and which one do you think has the
most potential ?
4.How important is water energy in our life ?
5.What are the serious consequences of wasting
energy ?
17. 1. What is the major source of energy ?
Our major source of energy comes from fossil
fuels (oil, coal, natural gas )
18. 2. Are fossil fuels limited ? Why/ why not ?
Yes, they are limited. Because power
demand is increasing rapidly
19. 3. How many sources of energy are mentioned in the text, and
which one do you think has the most potential ?
There are 5 sources of energy.
Solar energy is the most potential
20. 4. How important is water energy in our life ?
Man and most animals need a constant
supply of water to live. Man and animals
can’t live without water
21. 5. What are the serious consequences of wasting energy ?
The serious consequences are changing the
earth’s climate and increasing “ Green house
effect” ( hiệu ứng nhà kính)
Hiệu ứng nhà kính là hiện tượng CO2 tăng lên đáng kể
trong khí quyển, làm cho nhiệt độ trái đất tăng lên. Do
việc đốt cháy nhiên liệu quá mức trong các nhà máy
cũng như trong đời sống hằng ngày
23. 5. CONSOLIDATION: Watch the video and discuss the following
question:
What should we do to save and conserve energy ?
24. What should we do to save and conserve energy ?
- We should use natural lights instead of electric lights and turn off all
appliances when not in use
- We should reduce using of appliances by:
+ choosing which appliances you really need to use
+ unplugging everything
+replacing old appliances with new models
- We should keep walking or riding bikes
instead of driving motorbikes , cars..
- We should preserve and use sensibly energy
(preserve water, plants and animals, say no to cutting down and burning
forests, overexploiting minerals, using explosives and electricity to catch
fish and other sea animals.)
- We should stop discharging pollutants into soil, water..
25. 6.HOMEWORK:
1. Do the cloze test page 126 in the
students’ book.
2. Learn by heart all new words.
3. Prepare the next lesson ( part B: speaking).
- find out new words
- find out words/phrases to talk about
advantages and disadvantages of using some
sources of energy
