Module 1
1. Module 1
1.1. Lesson 1
Module 1: The International System of Units (SI)
Lesson 1: Length
Focus
© Christopher Dodge/shutterstock
Anna is helping her father work on the family car.
“I think we’ll need the 10-mm metric wrench to loosen this bolt,” Anna observed.
“You’re right,” her father smiled. “How did you know?”
“Well, the hexagonal head of the bolt is about the width of my small finger. And that’s about 1 cm, or 10 mm!”
Metric wrenches, such as the one in the photograph, are sized in millimetres. Do you remember how to convert millimetres to centimetres? What would a 12-mm wrench be in centimetres? What would it be in metres?
Lesson Questions
In this lesson you will explore these 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?
Assessment
You will complete the Lesson 1 Assignment Booklet for assessment. Download the Lesson 1 Assignment Booklet and save it in your course folder now. You will receive instructions on how to complete the Assignment Booklet later in the lesson. You will also be prompted to start working on the Unit 1 Project.
There are other activities that you will complete throughout this lesson. It is important to complete all activities and save them in your course folder. Your teacher may ask to see your work at any time.
The lesson provides you with opportunities to investigate, review examples, and practise the knowledge and skills you are learning. In Self-Check activities you can compare your answers to see if you are on track. If you are having difficulty with concepts or calculations, contact your teacher.
Required Materials and Equipment
To complete this lesson you will need the following items:
- a metric (SI) ruler or metre stick
- a metric (SI) tape measure