1 Introduction to the Scottish Qualifications Authority 1
2 introduction to the Unit 3
2.1 What is the Purpose of this Unit? 3
2.2 What are the Outcomes of this Unit? 3
2.3 What do I Need to be Able to do in Order to Achieve this Unit? 4
2.4 Approximate Study Time for This Unit 4
2.5 Equipment/Material Required for this Unit 4
2.6 Symbols Used in this Unit 6
3 Assessment Information for this Unit 7
3.1 What Do I Have to Do to Achieve This Unit? 7
4 Suggested Lesson Plan 9
5 Learning Material 13
5.1 Section 1 13
5.2 Section 2 32
5.3 Section 3 46
6 Additional Reading Material 65
7 Sol utions to Self Assessed Questions and Activities 67
8 Acknowledgements 91