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PES Skill Sheets.book - Capital High School

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Page 3 of 4<br />

Example 3: Measuring objects correctly<br />

Look at the picture above. How long is the domino?<br />

1. Report the length of the domino to the nearest 0.5 millimeters.<br />

2. Challenge: How many dominoes will fit end to end on the 30 cm ruler?<br />

Practice converting units for length<br />

By completing the examples above you show that you are familiar with some of the prefixes used in the metric<br />

system like milli- and centi-. The table on the following page gives other prefixes you may be less familiar with.<br />

Try converting the length of the domino from millimeters into all the other units given in the table.<br />

Refer to the multiplication factor this way:<br />

• 1 kilometer equals 1000 meters.<br />

• 1000 millimeters equals 1 meter.<br />

1. How many millimeters are in a kilometer?<br />

1000 millimeters per meter × 1000 meters per kilometer = 1,000,000 millimeters per kilometer<br />

2. Fill in the table with your multiplication factor by converting millimeters to the unit given. The first one is<br />

done for you.<br />

1000 millimeters per meter × 10 –12 meters per picometer = 10 –9 millimeters per picometer<br />

3. Divide the domino’s length in millimeters by the number in your multiplication factor column. This is the<br />

answer you will put in the last column.<br />

42.5 millimeters ÷ 10 –9 millimeters per picometer = 42.5 ×10 9 picometers

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