1. International System of Units (SI)
Metric System
International System of Units (SI)

2. International System
The international System – SI units, in multiples of TEN, provide a standard of consistent measurement for global science, business, and industry

3. Basic Metric Units Length Meter (m) Gram (g) Liter (l) Mass
Celsius (°C) or Kelvin (K)
Second (s)
Newton (N)
Change over time
Mass
Volume
Temperature
Time
Weight
Rate

4. LENGTH Length-distance between two points
Measure pencil – use centimeters
Measure distance from New York to Chicago – use kilometers
METER is the basic unit of length

5. VOLUME Amount of space an object takes up; SI unit – cubic meter (m3 )
To find volume of regular shape – measure length, width, and height and multiply them all
To find volume of irregular shape – volume by immersion

6. MASS Amount of matter in an object SI unit = kilogram
One liter of water has a mass of about 1 kg
Smaller masses are measured in grams (g); one gram is about the mass of a large paper clip

7. WEIGHT Measurement of force SI unit = newton (N)
Weight depends on gravity, which can change depending on where the object is located
Where would you weight more……on Earth or on Mars??

8. TEMPERATURE
Measure of kinetic energy in particles of matter; SI unit – kelvin (K)
Other measurements of temperature include degrees Celsius and degrees Fahrenheit

9. TIME Interval between two events; SI unit = second (s)
Rate is the amount of change of one measurement in a given amount of time
E.g. Speeds are often measured in kilometers per hour or miles per hour

10. Derived Units
Area – amount of surface included within a set of boundaries; expressed in square units of length, e.g., m2
Volume – amount of space occupied by an object, e.g., m3 for solids or mL or L for liquids
Density – amount of matter that occupies a given space; mass/volume, e.g., g/mL

11. Basic units: m, l, g Many M mega 1 000 000 (106)
Kids k kilo (103)
Have h hecto (102)
Dropped da/dk deka (101)
Over Basic Unit (ONES) (100)
Dead d deci (10-1)
Converting c centi (10-2)
Metrics m milli (10-3)
m micro (10-6)
n nano (10-9)
A Angstrom (10-10)

12. Many kids have dropped over dead converting metrics
Bigger to smaller - Move decimal right
Smaller to bigger - Move decimal left 3 3 3
100 (m, l, g)
Basic Unit M k h da d c m μ n
Many kids have dropped over dead converting metrics
4.22
422. cm = m
6523. m m = m
69630 ml
69.63 l =
13 dal =
130,000 ml kg
230 mg =
0.230 g
9.23 g =

13. Celsius The Metric Temperature Scale
Also called the centigrade scale.
Definitions
0°Celsius(C) = 32°Fahrenheit(F) = water freezes
100°Celsius = 212°Fahrenheit = water boils
Conversions
°Celsius = 5/9 X (°Fahrenheit - 32°)
°Fahrenheit = (9/5 X °Celsius) + 32°
30 is hot,
20 is nice,
10 is chilly,
0 is ice.

14. REVIEW “QUIZ” 1) 345 cm = km 0.00345 2) 22ºC = 71.6 ºF
3) k h da (m,l,g) d c m
kilo-
hecto-
deka-
deci-
centi-
milli-
Fill in the missing prefixes.

15. Drawings, Tables, and Graphs
Scientific Illustrations – often make information more clear than written text can
Drawings: can emphasize only necessary details or show things you can’t see
Photographs: show an object exactly as it is at a single moment
Tables – display information in rows and columns for easier comprehension

16. Drawings, Tables, and Graphs
Graphs: collect, organize, and summarize data visually
Line graph –shows relationship between two variables, which must be numbers
Bar graph – uses bars of different sizes to show relationships between variables; one variable is divided into parts; the other variable is a number

17. Drawings, Tables, and Graphs
Graphs: collect, organize, and summarize data visually
Circle graph – shows parts of a whole as percentages
Scales on graphs must be carefully constructed and analyzed so users easily understand the info

18. What Kind of Graph is This?
LINE GRAPH

19. What Kind of Graph is This?
Circle Graph

20. What Kind of Graph is This?
Bar Graph