Unit 5
Lesson 1
Sources of energy
Before reading
1-Look at the photos
a 
b 
c 
- GUESS ……. What do they show? They show sources of energy.
- Name the pictures.
- The Answers: a-solar panels b-wind turbines c-nuclear power station
5. The key words
|
The word / phrase |
The meaning |
The part of speech |
|
Solar |
of or from the sun |
Adjective |
|
Wind farms |
a group of wind turbines |
Noun |
|
Turbines |
types of machine through which liquid or gas flows and turns a special wheel with blades in order to produce power |
Noun |
|
Panels |
a flat section in the shape of a rectangle that is part of or fits into something larger |
Noun |
|
Windy |
with a lot of wind |
Adjective |
|
Heat |
the temperature of something |
Noun |
|
Cell |
a small part of something |
Noun |
|
Generator |
a machine that produces electrical power |
Noun |
|
Sunlight |
the light that comes from the sun |
Noun |
While reading
The conversation.
Teacher: Our project today is to find out about renewable energy resources. That means resources which are continually replaced and will not run out any time soon. Ramzi, what have you chosen as an example of a renewable resource?
Ramzi: The sun is a renewable source of energy. A lot of living things depend on its energy for heat and light. This energy can also be captured and used to power things. For example, if you have a solar calculator, it contains a solar cell, which uses sunlight to power the calculator. Solar panels that are used on houses have thousands of solar cells, and they make electricity from the sun’s heat. The major advantage of solar energy is that, after the solar panels have been installed, electricity is not expensive to generate.
Teacher: What about you, Nadia? What did you find out? Nadia: In windy places, wind energy can be used to make electricity, using wind turbines. These turbines are found in ‘wind farms’. They have blades that are attached to a generator at the centre. The wind spins the blades and the generator runs. This makes electricity. However, wind turbines can’t work if there is no wind, and sometimes the wind speed is so high it damages them.
Teacher: Ibrahim, what’s your example of a renewable resource? Ibrahim: It’s biomass. Biomass is plant material and animal waste that is used as fuel. For example, wood is a biomass fuel as long as we continue to plant new trees to replace those we cut down. Biomass can be used to provide heat and also to make electricity. The biomass is burnt to heat water and make steam. The steam is then used to make electricity.
The main ideas:
1- Forms of renewable energy sources such as: sun, wind and biomass.
2- The uses of each form of renewable energy sources.
3- The advantages of each form of renewable energy sources.
4- The disadvantages of each form of renewable energy sources.
5- The way in which each form of renewable energy sources generates electricity.
6- Biomass is the only form of renewable energy that is a fuel.
7- The situations that biomass fuel would not be renewable.
-Name other sources of energy. Nuclear, oil, gas, wood, coal.
-Sources of energy are two kinds:
|
renewable sources |
sun, water, wind, biomass |
|
non-renewable sources |
gas, oil, coal |
- The word renewable
|
re |
is a prefix |
|
new |
is a stem |
|
able |
is a suffix |
|
renewable |
means resources which are continually replaced and will not run out any time soon |
-Comprehensive questions:
- What is their project? Renewable energy resources.
- What does renewable energy resources mean? Means resources which are continually replaced and will not run out any time soon.
The main parts of the wind turbines
Exercise: 5
Pronunciation
- Read the following words, and pay attention to the letters /ou/ that have the sound /a Ʊ/.
/a Ʊ/ our, /aƱ/ out, /aƱ/ about
- Think of any other words that have this sound. hour
- NOTE: the sound /a Ʊ/ does not necessarily match with spelling /ou/ for example resources and you.
- Find words from the conversation.
thousands, houses, found, power, however, down.