2. Green = Countries that use the metric system
Burma
Liberia
Green = Countries that use the metric system
Gray = Countries that do not use the metric system

3. What is the metric system?
The metric system is also called the International System of Units (SI).
The base units of measurement in the SI system are:
length – meter (m)
mass – gram (g)
Volume – liter (L)
time – second (s)
temperature – kelvin (K) (but we will use Celsius (°C) in this class)

4. Tools for measuring length
Meter stick, ruler

5. Tools for measuring Mass
Scale, balance

6. Tools for measuring volume
Graduated cylinder, beaker, pipette

7. What is the metric system?
The metric system is based on multiples of 10 and all converting in the metric system can be done by multiplying or dividing by multiples of 10, (10, 100, 1000, etc.)
The meter, gram, liter, second, & kelvin can all be made larger or smaller by adding prefixes to each base unit.

8. Metric System Prefixes and Their Meanings:

9. Converting in the Metric System

10. Let’s Watch a Brain Pop: Metric Units

11. Ladder Method 1st – Determine your starting point.
KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.

12. Example: 4 km = _________ m
Ladder Method 1 2 3
KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit
4000
Example: 4 km = _________ m
Where is the decimal?

13. Example: 55 mL = _________ L
Ladder Method
KILO 1000 Units
HECTO 100 Units 3
DEKA 10 Units 2 1
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit
0.055
Example: 55 mL = _________ L

14. < Conversion Practice > 1 1000 1600 14000 0.109 0.25
Try these conversions using the ladder method. 1
1000
1600
a) 1000 mg = _______ g b) 1 L = _______ mL c) 160 cm = _______ mm
d) 14 km = _______ m e) 109 g = _______ kg f) 250 m = _______ km
14000
0.109
0.25
Compare using <, >, or =.
g) 56 cm m h) 7 g mg
<
>

15. STUDENTS: STOP YOUR NOTES HERE

16. Metric Conversion Challenge
Write the correct abbreviation for each metric unit.
1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____
2) Meter _____ 5) Millimeter _____ 8) Centimeter _____
3) Gram _____ 6) Liter _____ 9) Milligram _____
Try these conversions, using the ladder method.
10) 2000 mg = _______ g 15) 5 L = _______ mL 20) 16 cm = _______ mm
11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km
12) 480 cm = _____ m 17) 75 mL = _____ L 22) 65 g = _____ mg
13) 5.6 kg = _____ g 18) 50 cm = _____ m 23) 6.3 cm = _____ mm
14) 8 mm = _____ cm 19) 5.6 m = _____ cm 24) 120 mg = _____ g

17. Compare using <, >, or =.
25) 63 cm m 27) 5 g mg 29) 1,500 mL L
26) 536 cm dm 28) 43 mg g 30) 3.6 m cm

18. Metric Conversion Challenge… ANSWERS!
Write the correct abbreviation for each metric unit.
1) Kilogram = kg 4) Milliliter = mL 7) Kilometer = km
2) Meter = m 5) Millimeter = mm 8) Centimeter = cm
3) Gram =g 6) Liter = L 9) Milligram = mg
Try these conversions, using the ladder method.
10) 2000 mg = 2 g 15) 5 L = 5,000 mL 20) 16 cm = 160 mm
11) 104 km = 104,000 m 16) 198 g = .198 kg 21) 2500 m = km
12) 480 cm = 4.80 m 17) 75 mL = L 22) 65 g = 65,000 mg
13) 5.6 kg = 5,600 g 18) 50 cm = 0.50 m 23) 6.3 cm = 63 mm
14) 8 mm = 0.8 cm 19) 5.6 m = 560 cm 24) 120 mg = g

19. Compare using <, >, or =.
25) 63 cm m 27) 5 g mg 29) 1,500 mL L
26) 536 cm dm 28) 43 mg g 30) 3.6 m cm
STOP HERE

20. 7588 cm
1.76 m
14970 mm
76.6 m
58770 m km
795.9 mm
9131 cm cm
7.851 km mm km
5670 ml
7.770 l
36040 mg
159.5 g
19760 g
436.9 kg mg kg

21. Find your table number and sit at the table beneath the #
Please turn your Measuring Liquid Volume Lab into the in-box. Staple it if necessary.
*There is a stapler on the back counter.
Please have your SI Units homework out so I can stamp it.

22. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit

23. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit

24. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit

25. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit

26. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit

27. KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit