1. Module 1

1.5. Page 5

Mathematics 10-3 Module 1 Lesson 1

Module 1: The International System of Units (SI)

 

Lesson Summary

 

Auto mechanics are skilled technicians who know the importance of choosing the right tool for the job. To choose the right tool, mechanics must be familiar with SI.

 

This photo shows someone reaching over a car engine with a wrench in hand.

© Tselichtchev/shutterstock

 

In this lesson you explored three questions:

  • How is length measured in SI?
  • What are the common units used when measuring length in SI?
  • How are lengths in one unit converted to another unit?

You discovered the metre is the base unit of length from which other units can be derived. You examined the relationships among the metre, millimetre, centimetre, and kilometre. You discovered these relationships are based on powers of 10. So, to convert among these units, you just move the decimal to the left or right. Look back to the chart of prefixes to review how each prefix relates to powers of 10 and affects the position of the decimal.

 

m10_3_assign.jpg Assignment

 

Retrieve the Lesson 1 Assignment Booklet you saved in your course folder at the start of this lesson. Complete the Assignment Booklet. Resave your Assignment Booklet in your course folder and submit a copy to your teacher for assessment.

 

Unit 1 Project

 

Before you move on to the next lesson, you should read through the Unit 1 Project and start thinking about what you may wish to do for the Project.