1. SI Units and Standards of Measurement
Mr. Haase

2. Standards of Measurement
Exact quantity used to compare measurements
U.S. uses English & metric standards
Most other nations all metric system
English Vs. Metric System
Yards vs. Meters
Gallons vs. Liters
Pounds vs. Grams
Miles vs. Kilometers
Fahrenheit vs. Celsius

3. Metric System SI System System International or Metric System
Accepted by scientist throughout the world
Uses a base unit with prefixes
Based on units of 10

4. Metric System Base Units
Meter
Liters
Gram
Second
Celsius/Kelvin measures temp

5. Metric Prefixes Metric Prefixes Use prefixes with base units
Kilo = 1000
Hecto = 100
Deca = 10
Base Units (g, L & m) = 1
Deci = 1/10 or 0.1
Centi = 1/100 or 0.01
Milli = 1/1000 or 0.001

6. Metric Prefixes

7. Length Length Distance between two points
Metric base unit is the meter

8. Volume Volume Amount of space occupied by an object
Metric base unit is Liter
Volume of a solid is measured with unit of length
Length x Width X Height
L(1) x L(2) x L(3)
cm³

9. Volume Volume of a liquid Volume of a solid
Use graduated cylinders for precise volume
Volume of a solid
Use ruler or meter stick to measure 3 dimensions

10. Mass
Mass
Amount of matter in an object
Metric base unit is the gram

11. Density Density The mass per unit volume of an object
Density equals mass of an object divided by the volume
D = m/v
Unit for density is g/cm³ OR g/mL
Density < 1 object floats
Density > 1 object sinks

12. Time and Temperature Time Temperature Interval between two events
Unit of measurement is seconds
Temperature
How hot or cold something is
Unit of measurement is °Celsius or °Kelvin

13. Temperature Conversions
Temp Conversions
Water boils at 100° C and 212° F
Water freezes at 0° C and 32°F
C = (F – 32) x .56
F = (C x 1.8)

14. Example Problems
Find the volume of a box that has a length of 2.3 mm, height of 3.4 mm and a width of 2.1 mm.
2. Find the width of a container that has a volume of 120 cm³, length of 10 cm and height of 5 cm.
3. Find the density of an object that has a mass of 2.1 mg and volume of 9.2 mm³.
4. Find the mass of an object that has a density of 0.78 g/ml and a volume of 16 ml.

15. Example Problems 1. Convert the following: 97° F to C 12°F to C
45° C to F
97° F to C
12°F to C
65° C to F