1. Using Electricity Wisely
Chapter 12
Using Electricity Wisely
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2. We have to pay for the electricity we use.
Can you guess where electricity comes from?
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3. 3) Steam turns the turbine.
How electricity is produced in a power station
2) Steam is produced.
3) Steam turns the turbine.
steam
generator
turbine
boiler
4) The turbine is connected to a generator. As the turbine turns, the generator spins and produces electricity.
1) Oil, coal and natural gas are burnt to boil water.
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Second Video
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5. Wind and running water can also be used to generate electricity.
dam
windmills
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Oil, coal and natural gas are natural resources that come from the Earth.
They take a long time to be formed and cannot be replaced quickly.
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The more we use them, the less we will have for the future.
It is our responsibility to use these resources carefully.
please check ‘disappear’ effect for Dr Atom if not using Office XP.
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8. Conserving Electrical Energy
We can use these resources carefully by conserving electrical energy.
I am leaving the room now!
Mum, I am going to read my book. You may turn the TV off.
What good habits do Joe and Sue have?
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9. Conserving Electrical Energy
Switch off all electrical equipment that are not in use.
Use energy-saving bulbs. These bulbs use less electricity, but produce sufficient light.
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10. Conserving Electrical Energy
Do not open the door of the refrigerator unnecessarily. Each time the door is opened, more electricity is needed to cool the refrigerator.
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11. Conserving Electrical Energy
At night, sleep with the lights off. If you really need to have some light, use a small lamp.
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12. Conserving Electrical Energy
Use electrical equipment that switch off automatically.
timer
kettle
rice cooker
microwave oven
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13. Not only that, your family saves money too!
By conserving electricity, oil, coal and natural gas resources can last longer!
Not only that, your family saves money too!
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At a glance…
Electricity is produced by generators in power stations.
Oil, coal and natural gas are burnt to produce electricity in power stations.
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At a glance…
These natural resources do not last forever. We need to use them carefully so that they can last for a long time.
Conserving electrical energy can allow oil, coal and natural gas to last longer.
Using less electricity also helps save money.
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