1. Metrics

2. Units of Measurement I. Units of Measurement
-physical quantity of a defined size
A. The SI Measurement System
1. SI (Le Systeme International)
a measurement systems that scientist world wide have agreed to use.

3. Units of Measurement 2. SI is a decimal (base 10) system
Every unit is 10 times the size of the next smaller unit or 1/10 of the next larger unit.

4. Units of Measurement
B. Fundamental SI Units - one that is defined by a constant value which is easy to reproduce and practical in size; All other units can be derived from these units
Derived- units combined to make different unit

5. Units of Measurement Fundamental Units 1. length - meter (m)
2. mass - gram (g)
3. time - second (s)
4. volume - liter (L)
5. temperature - Kelvin (K)
Celcius (oC)

6. Units of Measurement C. Prefixes milli (m) - 1/1000 = .001 = 10-3
centi (c) - 1/100 = .01 = 10-2
deci (d) - 1/10 = .1 = 10-1
deka (Dk) – 10 = 101
hecta (H) – 100 = 102
kilo (K) – 1000 = 103
kilo
hecta
deka
(fund.unit)
deci
centi
milli

7. Units of Measurement D. Assign each metric unit a mental picture
millimeter - the thickness of a dime
centimeter - the width of a little finger
meter - the width of an avg. doorway
kilometer - the length of 10 football fields

8. Units of Measurement milligram - the weight (mass) of a grain of salt
gram - the mass of an avg. paper clip
kilogram - the mass of an adult pair of shoes
milliliter - the amount a small eye dropper can hold
liter - the amt. of about 4 drinking glasses
mass                                                                             

9. Units of Measurement E. Conversions 10 cm = ______ mm 30 mm = _____ cm
25 km = _____ m
49 cm = _____ m
10.8 g = _____ mg
115 mg = ____ Kg
Metrics make me flip!
kilo
hecta
deka
(fund.unit)
deci
centi
milli

10. Units of Measurement E. Conversions 10 cm = 100 mm 30 mm = 3 cm
25 km = m
49 cm = 0.49 m
10.8 g = mg
115 mg = Kg
Metrics make me flip!
kilo
hecta
deka
(fund.unit)
deci
centi
milli

11. Units of Measurement 1.7 L = _____ mL 8 m = ______ mm ______ cm
______ dm
______ Dkm
______ Hm
______ Km
kilo
hecta
deka
(fund.unit)
deci
centi
milli

12. Units of Measurement 1.7 L = 1700 mL 8 m = 8000 mm 800 cm 80 dm
0.8 Dkm
0.08 Hm
0.008 Km
kilo
hecta
deka
(fund.unit)
deci
centi
milli

13. Meters and Yards are Different!

14. Using a Ruler The English SIDE has fractional parts marks or divisions
(1/2 inch;1/4 inch;1/8 inch; 1/16 inch)
marks or divisions
Your answer will look like: /8 (make sure to reduce your fractions!)
NO DECIMALS!

15. Using a Ruler The metric SIDE has factors of 10 marks or divisions.
Your answer will look like: cm
NO FRACTIONS!

16. Reflection Questions 1. Why was the SI system developed?
2. What are the fundamental units of the SI system?
3. If an object is smaller than the fundamental unit what are the possible prefixes?
4. If an object is larger than the fundamental unit what are the possible prefixes?
5. Write Your Own (write a question from the notes and answer it)