Unit 11: sources of en erg y

Water Power
Hydroelectric dam
Windmill
Wind power




reactor /ri:`æktə/ ( n) :
lò phản ứng

limited /`limitid/ ( adj ) :
hạn chế, có giới hạn

unlimited /ʌn`limitid/ (adj):
không giới hạn

renewable /ri`nju:əbl/ (adj ) :

có thể thay thế
non-renewable /,nɔn `ri`nju:əbl/ (adj ):
không thể thay thế
Task 1. The following statements list some advantages and disadvantages of various sources of energy. Read and tick (?) the appropriate box A ( for the advantages ) or D (for the disadvantages ), then compare the results with partner`s.
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Task 2: Work in pairs. Talk with your friend about the advantages and disadvantages of using each alternative sources of energy , using the suggestions from Task 1.
Why do you think so?
I think that wind power can be an alternative source of energy.......
It is available
It can be dangerous
It is unlimited

It is not only plentiful
and infinite but also
clean and safe

It is clean
and unlimited
It is clean and
unlimited
It is only available in
some places
It is only possible
during the day time
If the wind doenn’t
blow,there is no
wind no energy.
It is expensive to
built a dam
for hydroelectricity
A: I think that can be an alternative sources
of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while


Example :
wind power
(1)
the wind is abundant and unlimited. (2)
it is also clean and safe to the environment.
(3)
it is not available when there is no wind.
(4)
However,
B: I know
A: I think that _______(1)___________ can be an alternative source of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while __________(2)____________ .

However, _________(4)_____________ .
B: I know ___________(3)____________.
(1): solar energy
(2): solar energy is plentiful and infinite.
(3): It is also clean and safe to the enviroment.
(4): It is only possible during the day time.
A: I think that solar energy can be an alternative sources
of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while the solar energy is plentiful and infinite.


However, it is only possible during the day time.
B: I know it is also clean and safe to the environment.
A: I think that _______(1)___________ can be an alternative source of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while __________(2)____________ .

B: However, _________(3)_____________ .
(1): nuclear power
(2): nuclear power is unlimited
(3): It can be very dangerous. A nuclear reactor releases radiation which is harmful to the environment.
A: I think that _______(1)___________ can be an alternative source of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while __________(2)____________ .

However, _________(4)_____________ .
B: I know ___________(3)__________________ .
(1): water power
(2): water is unlimited
(3): It also provides energy without pollution.
(4): It is expensive to build a dam for hydroelectricity
A: I think that _______(1)___________ can be an alternative source of energy.
B: Why do you think so?
A: Because our major sources of energy are running out while __________(2)____________ .

However, _________(3)_____________ .
B:
(1): geothermal heat
(2): this heat is available.
(3): It is possible only in a few places in the world.