GRADE 9 SCIENCE UNIT 5 .pg

DEPARTMENT OF EDUCATION

GRADE 9 SCIENCE

UNIT 5

ELECTRICITY

PUBLISHED BY FLEXIBLE OPEN AND DISTANCE EDUCATION FOR THE DEPARTMENT OF EDUCATION PAPUA NEW GUINEA 207

Writer Nieves Celmar

Content and Language Editors Subject Content Adviser Science Department Subject Review Committee

Course Format Editor Anna Liza Cale

GR 9 SCI U5

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GRADE 9 SCIENCE

TITLE

UNIT 5

ELECTRICITY

IN THIS UNIT YOU WILL LEARN ABOUT:

TOPIC 1: TYPES OF ELECTRICITY TOPIC 2: ELECTRIC CIRCUITS TOPIC 3: USES OF ELECTRICITY TOPIC 4: GENERATING ELECTRICITY

GR 9 SCI U5

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ACKNOWLEDGMENTS & ISBN

Acknowledgement

We acknowledge the contributions of all Secondary Teachers who in one way or another have helped to develop this Course.

Our profound gratitude goes to the former Principal of FODE, Mr. Demas Tongogo for leading FODE team towards this great achievement.

Special thanks to the Staff of the Science Department of FODE who played active roles in coordinating writing workshops, outsourcing lesson writing and editing processes, involving selected teachers of Central Province and NCD.

We also acknowledge the professional guidance provided by Curriculum and Development Assessment Division throughout the processes of writing, and the services given by member of the Science Review and Academic Committees.

The development of this book was Co-funded by GoPNG and World Bank.

DIANA TEIT AKIS PRINCIPAL

Flexible Open and Distance Education Papua New Guinea

Published in 2017 by Flexible Open and Distance Education ?Copyright 2017, Department of Education, PNG

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without permission from the publisher.

Printed by Flexible Open and Distance Education ISBN: 978-9980-87-694-2 National Library Services of Papua New Guinea

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TABLE OF CONTENTS

CONTENTS

Page

Secretary`s Message........................................................................

4

Unit Introduction.............................................................................. Study Guide.................................................................................... TOPIC 1: Types of Electricity................. .....................................

5 6 7-48

Lesson 1: Static Electricity....................................................

9-15

Lesson 2: Current Electricity................................................. 16-22

Lesson 3: Current and Voltage.............................................. 23-30

Lesson 4: Safety and Prevention.................................................... Answers to Practice Exercises............................................................ Review of Topic 1............................................................................

31-42 43-45 46-48

TOPIC 2: Electric Circuits............................................................ 49-87

Lesson 5: Series Circuits .................................................... 51-63

Lesson 6: Parallel Circuits............................................................. Lesson 7: Ohm`s Laws........................................................ Answers to Practice Exercises........................................................... Review of Topic 2............................................................................

66-72 73-83 84-85 86-87

TOPIC 3: Uses of Electricity........................................................ 89-124

Lesson 8: Lighting Effects................................................... 91-100

Lesson 9: Heating Effects.................................................... Lesson 10: Electromagnet.................................................... Answers to Practice Exercises.......................................................... Review of Topic 3...........................................................................

101-109 110-120 121-122 123-124

TOPIC 4: Generating Electricity................................................... 125-162

Lesson 11: Electrical Power and Costing.................................. 127-134

Lesson 12: Conservation of Electrical Energy................................. 135-143

Lesson 13: Hydroelectricity.................................................... Answers to Practice Exercises.......................................................... Review of Topic 4........................................................................... Glossary....................................................................................... References....................................................................................

144-154 155-157 158-159 160-161

162

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