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
1
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
2
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
GR 9 SCI U5
3
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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