Welcome to our class
TOPIC
1
ALTERNATIVE
SOURCES
oil
3
2
4
5
6
solar
energy
wind power
gas
coal
FOSSIL FUELS
nuclear
power
geothermal
heat
water
power
Complete the mind map.
SOURCES OF ENERGY
1. What is this video clip about?
watch the video
2. What do you know about the energy ?
BEFORE YOU READ
Activity 1: Choose the main idea.
WHILE YOU READ
1
3
2
Activity 2: Scan the passage and write down the advantage (s) and disadvantage (s) of each alternative source of energy.
WHILE YOU READ
Paragraph 2
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.
It’s unlimited.
(P2-L1,2)

It can be very dangerous.
(P2-L3)


It’s available in only
a few places. (P2-L5,6)
It is available. (P2-L4)
Paragraph3
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 dams cost a lot of money, so water energy is expensive.
It’s clean and unlimited. (P3-L2,3)
If the wind does not blows, there is no wind energy. (P3-L3,4)
It’s clean and unlimited.
(P3-L6)
It’s expensive. (P3-L7,8)
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 their 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.
It’s plentiful, infinite, clean and safe.
(P4-L4,5)
It’s only possible during the day.
Activity 2: Scan the passage and write down the advantage (s) and disadvantage (s) of each alternative source of energy.
Complete the summary of the reading passage by filling each blank with a suitable word from the box.
We need energy to live and work. Our nature source of (1) ______ is oil . Oil is (2) ____ kind of fossil fuel. The amount of fossil (3) _____ in the world is(4) ________. Therefore, we must save it, and at the same time, we must find new source of energy. Geothermal heat and nuclear power are (5) __________ source of energy. They can give us electricity. Other alternative (6) _______ are the sun, waves and water. These source are not only (7)__________ and available but also clean and save for the (8) ___________ . People should develop and use them more and more in the future.
one
environment
alternative
limited
unlimited
sources
energy
fuels
AFTER YOU READ
(n)
(n)
(n)
(a)
(a)
(a)
(n)
(n)
(n)
(n)
(a)
(a)
(a)
(n)
(a)
(n/a)
Complete the summary of the reading passage by filling each blank with a suitable word from the box.
We need energy to live and work. Our nature source of (1) ______ is oil . Oil is (2) ____ kind of fossil fuel. The amount of fossil (3) _____ in the world is(4) ________. Therefore, we must save it, and at the same time, we must find new source of energy. Geothermal heat and nuclear power are (5) __________ source of energy. They can give us electricity. Other alternative (6) _______ are the sun, waves and water. These source are not only (7)__________ and available but also clean and save for the (8) ___________ . People should develop and use them more and more in the future.
one
environment
alternative
limited
unlimited
sources
energy
fuels
AFTER YOU READ
Unlimited
Very dangerous
Plentiful , infinite, clean and safe.
Produced only in daytime
Clean and safe
Must build dams , so expensive
Clean and unlimited
No energy when no wind
available in only a
few places
It is available
Homework
Do reading exercise of Unit 11 in workbook.
Prepare the next lesson: Speaking.

Thank for your attention!