1. The International System of Measurement (SI)

2. SI System of measurement used world wide
Makes communication between countries, languages and different measurement systems easy, consistent
Uniformed – everyone is “speaking the same language”

3. Base Quantities
Base Units
Symbol
Length
Meter m
Mass
Gram g
Volume
Liter l
Temperature
Celsius C

4. Prefixes Used to change the size of the value
Used in front of the base unit
Used to make large numbers smaller and smaller numbers larger
Does not change the value itself

5. Common Prefixes Prefix Symbol Value Power of 10 kilo- k- 1000 103
hecto- h-
100
102
deca-
da- 10
101
Base unit
g,l,m 1
deci- d-
1/10
10-1
centi- c-
1/100
10-2
milli- m-
1/1000
10-3

6. Unit Conversions Used to change from one sized unit to another
Value does not change only the size of the unit
ex: 1 dollar = 100 pennies = 20 nickels =
10 dimes = 4 quarters
Value ($1) remains the same, just the size of the unit changes

7. Tools of Measurement
Equipment used to measure mass, length, volume and temperature
Each tools measures in its own unit
The smaller the unit the more accurate the measurement

8. Tools of measurement (con’t)
Base Quantities
Tools
Units
Mass
Balance
Grams
Volume
Graduated Cylinder
milliliters
Length
Metric ruler
cm/m
Temperature
thermometer ºC

9. D M V D = M V C. Derived Units Combination of base units.
Volume - length  length  length
1 cm3 = 1 mL dm3 = 1 L
Density - mass per unit volume (g/cm3) D M V
D = M V

10. The Perfect Graph 6 points all graphs need to have 1. Title
2. Label Axis w/ correct units
3. Choose an appropriate interval for axis (Make it big enough!)
4. Use a straight edge
5. Best fit line
6. slope should be in decimal form.

11. D. Graphing & Density
Mass (g)
Volume (cm3)

12. D M V E. Density V = 825 cm3 M = DV D = 13.6 g/cm3
An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its mass.
GIVEN:
V = 825 cm3
D = 13.6 g/cm3
M = ?
WORK:
M = DV
M = (13.6 g/cm3)(825cm3)
M = 11,220 g D M V

13. D M V E. Density D = 0.87 g/mL V = M V = ? M = 25 g V = 25 g 0.87 g/mL
1) A liquid has a density of 0.87 g/mL. What volume is occupied by 25 g of the liquid?
GIVEN:
D = 0.87 g/mL
V = ?
M = 25 g
WORK:
V = M D D M V
V = g
0.87 g/mL
V = 28.7 mL

14. D M V D. Density M = 620 g D = M V = 753 cm3 D = ? D = 620 g 753 cm3
2) You have a sample with a mass of 620 g & a volume of 753 cm3. Find density.
GIVEN:
M = 620 g
V = 753 cm3
D = ?
WORK:
D = M V D M V
D = g
753 cm3
D = 0.82 g/cm3