1. CONVERSIONS

2. Learning Targets 8 I am able to identify SI and their prefixes. 9
I am able to use a dimensional analysis grid to convert numbers in the SI system of units.

3. Conversion Factors Set-up as a fraction
Always the number 1 in either the numerator or denominator
Top and bottom are equal
Whole fraction equals 1
Anything multiplied or divided by 1 does not change the value

4. Conversion Factors with Metric Units
1 kg __ cm L __ dm
__g m __ mL m
100 cm
10 dm
1,000 g
1,000 mL
*Multiplying gives bigger number but smaller unit
*Dividing gives smaller
number, but bigger unit

5. Use Conversion Factors
1.85 m  cm
1.85 m x cm = m
185 cm
Conversion
Factor

6. Dimensional Analysis Grid
1.85 m  cm
1.85 m cm = m
185 cm x
Conversion
Factor

7. Dimensional Analysis Grid
1.85 m  cm
1.85 m =
100 cm
185 cm 1 m
Conversion
Factor

8. Try this…..
The height of a building is 553m tall. How many kilometers is that? 1
553 m km
= km
1000 m

9. Try this…
The mass of an object is 35 kg. What is the object’s mass in grams?
35 kg
1,ooo g
= 35,000 g 1 kg
Answer: 35,000 grams

10. Try this…
Your next class is kilometers away. How many meters will you need to walk to get there? km
1,ooo m
= 74.8 m 1 km
Answer: 74.8 meters

11. More Practice

12. Use Pit Stops when needed…
1.85 km  cm
1.85 km
1000 m
100 cm
= 185,000 cm 1 km 1 m
Conversion
Factor
Conversion
Factor

13. Try This…
Convert 51.3 kg to hectograms.
51.3 kg
1000 g 1 hg
= 513 hg 1 kg
100 g
Answer: 513 hectograms

14. Try this…
Convert 97,000 centimeters into kilometers.
97,000 cm 1 m 1 km
= km
100 cm
1000 m
Answer: 0.97 kilometer

15. Try this……CHALLENGE!! Convert 186 days into seconds 60 min. 186 days
24 hrs.
60 s
= 16,070,400 seconds
1 min.
1 days
1 hr.

16. More Practice