Using Electricity Wisely

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Presentation transcript:

Using Electricity Wisely Chapter 12 Using Electricity Wisely My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

We have to pay for the electricity we use. Can you guess where electricity comes from? My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

My Pals are Here! Science 5B © 2003 Times Media Private Limited First Video http://www.youtube.com/watch?v=A88GavnD_DQ&feature=related Second Video http://www.youtube.com/watch?v=ynOnaTrHS7Q&feature=related My Pals are Here! Science 5B © 2003 Times Media Private Limited

Wind and running water can also be used to generate electricity. dam windmills My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

My Pals are Here! Science 5B © 2003 Times Media Private Limited 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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

My Pals are Here! Science 5B © 2003 Times Media Private Limited 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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

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? My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

Conserving Electrical Energy At night, sleep with the lights off. If you really need to have some light, use a small lamp. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

Conserving Electrical Energy Use electrical equipment that switch off automatically. timer kettle rice cooker microwave oven My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

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! My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

My Pals are Here! Science 5B © 2003 Times Media Private Limited At a glance… Electricity is produced by generators in power stations. Oil, coal and natural gas are burnt to produce electricity in power stations. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.

My Pals are Here! Science 5B © 2003 Times Media Private Limited 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. My Pals are Here! Science 5B © 2003 Times Media Private Limited You are reminded that under the Copyright Act, it is an offence to reproduce or copy any part of this presentation without permission from Times Media Private Limited.