1. Module 1

1.8. Page 3

Mathematics 10-3 Module 1 Lesson 2

Module 1: The International System of Units (SI)

 

Explore

 

You have seen that unit squares of various sizes can be used to measure area. SI provides units of area for many situations.

 

m10_3_trythis.jpg Try This

 

In this activity you will explore common SI units of area and the relationships among them. Share your work from this activity and place it in your course folder.

 

You will need an old newspaper, tape, scissors, and a metric measuring tape or ruler.

 

Measure, cut, and tape some newspaper together to form a square that measures 1 m on each side—in other words, a 1-m square.

 

A graphic shows a 1-m square made of newsprint.

 

TT 4. Name three different surfaces you might measure using a 1-m square.

 

Next, from one corner of your 1-m square, cut a square that measures 1 cm on each side—in other words, a 1-cm square.

 

A graphic shows a 1-cm square of newsprint resting on the ground. Above, a 1-m square of newsprint with a 1-cm square hole is shown.

 

TT 5. Name three different surfaces you might measure using a 1-cm square.

 

TT 6. How many 1-cm squares could you cut from the 1-m square? How do you know?

 

Finally, from one corner of your 1-cm square, cut a square that measures 1 mm on each side—in other words, a 1-mm square.

 

TT 7. Name three different surfaces you might measure using a 1-mm square.

 

TT 8. How many 1-mm squares could you cut from the 1-cm square? How many 1-mm squares could you cut from the 1-m square? How do you know?

 

m10_3_share.jpg Share

 

It’s time to share your answers to TT 4 to TT 8. Remember that sharing work is an important part of learning. Use the following tips to ensure you get all the benefits from this sharing opportunity:

  • You have completed TT 4 to TT 8 to the best of your ability. The answers are in a form that you can share easily with another student or with your teacher, if so directed.

  • Use your class discussion area, or another method indicated by your teacher, to post your answers to TT 4 to TT 8 and to view the work of the people you are sharing with.

  • Compare the answers for TT 4 to TT 8. Identify where you have similar answers, and where your answers are different. Discuss all differences between the answers until you have an agreement. If necessary, you may wish to involve your teacher in your discussion.

  • Revise your answers to TT 4 to TT 8 where necessary.

Save the revised copy of your work in your course folder. Ask your teacher whether you are to save a transcript of your discussion in your course folder as well.