This presentation provides a quick breakdown on how SI works.

1. Scientific Measurement

2. The International System of Units
 The international system of units also
known as SI
 Developed in the late 1700’s
 This is the system of measurement
used by scientists around the world.

3. The International System of Units
 The system was created to let scientists
communicate even if they didn’t speak
the same language.
 There are many different units of
measurement used throughout the
world.

4. Notes: SI system
 SIlets scientists all over the world use
the same measurements even if they
speak different languages.

5. SI
 Many of these units were based on parts of
the body such as the foot. Other units such
as inches were based on grains of barley.
 These different units caused problems when
scientists from different countries tried to
work together.
 Other problems occurred with units based on
things that could change size like a foot.

6. About SI
 SI is a base 10 system
 This means that each unit of measurement is
based on multiples of 10.
 This makes conversion between units easy
 It also eliminates fractions like in American
standard, and uses decimals instead.

7. Notes: SI Units of Measurement
 The SI unit of length is meters
 The SI unit of mass is kilograms
 The SI unit of volume is liters
 The SI unit of temperature is Kelvin or
Celsius

8. SI Units of Measurement
 SI units for length
 Meter (m)
 Kilometer (km) 1km = 1,000m
 Decimeter (dm) 1dm = 0.1m
 Centimeter (cm) 1cm = 0.01m
 Millimeter (mm) 1mm = 0.001m 1

9. SI Units of Measurement
 SI unit of volume
 Cubic meter (m³)
 cubic centimeter (cm³)
 Liter (L)
 Milliliter (mL)

10. SI units of measurement
 SI unit of temperature
 Kelvin(K) 0°C = 273K
 Celsius (°C ) 100 °C =373K

11. SI unit of Mass
 Kilogram (kg)- equal to 1,000 grams.
 Gram (g)- basic unit of mass
 Milligram(mg)- one thousandth of a
gram,

12. Temperature
 Temperature, measures the average
heat, or energy of motion, in the
molecules of an object.
 The SI units of measure for temperature
is Celsius (C) and Kelvin (K)
 The standard unit is Fahrenheit

13. Temperature
 Thefreezing and boiling points of
water are the benchmarks for Celsius
and Fahrenheit .
 Freezing
for C is 0° and boiling
temperature is 100°.
 This
is why the Celsius scale is also
known as the Centigrade scale.

14. Temperature
 Kelvin uses a different benchmark.
 Thelowest temperature on the Kelvin
scale is absolute zero.
 This
is the point at which all motion in
molecules stop.

15. Common uses of SI
 Area: is the size of the surface of an object.
You find it by multiplying length x width l
xw
 Mass, is the amount of matter in an object.
You find it by using scales.
 Volume, is the amount of space an object
takes up, it is 3 dimensional. You find it by
multiplying length x width x height, (l x w x h)

16. Density
 Density, is the amount of matter in an
object in a given volume. Density =
mass divided by volume or D= m
v