Transcript Metric System - POTOSI SCHOOL DISTRICT

Metric System
International System of Units
(SI)
International System
The international System – SI units, in
multiples of TEN, provide a standard of
consistent measurement for global
science, business, and industry
Basic Metric Units
Meter (m)
Gram (g)
Liter (l)
Celsius (°C) or
Kelvin (K)
Second (s)
Newton (N)
Change over
time
Length
Mass
Volume
Temperature
Time
Weight
Rate
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
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
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
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??
TEMPERATURE
Measure of kinetic energy in particles of
matter; SI unit – kelvin (K)
Other measurements of temperature
include degrees Celsius and degrees
Fahrenheit
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
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
Basic units: m, l, g
Many
M
mega
1 000 000
(106)
Kids
k
kilo
1000
(103)
Have
h
hecto
100
(102)
Dropped
da/dk
deka
10
(101)
Over
--- Basic Unit (ONES)--- 1
(100)
Dead
d
deci
.1
(10-1)
Converting
c
centi
.01
(10-2)
Metrics
m
milli
.001
(10-3)
-----
m
micro
.000001
(10-6)
-----
n
nano
.000000001
(10-9)
-----
A
Angstrom
.0000000001 (10-10)
Bigger to smaller Move decimal right
Smaller to bigger Move decimal left
3
3
100 (m, l, g)
M
k
da Basic Unit d
h
c
3
μ
m
Many kids have dropped over dead converting metrics
m
6523. m m =
0.006523 m
ml
13 dal =
130,000 ml
0.00923 kg
9.23 g =
230 mg =
422. cm =
4.22
69.63 l = 69630
0.230 g
n
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.
REVIEW “QUIZ”
1) 345 cm = 0.00345
km
2) 22ºC = 71.6 ºF
3) k
h
da
(m,l,g)
kilo- hecto- dekaFill in the missing prefixes.
d
c
deci- centi-
m
milli-
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
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
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
What Kind of Graph is This?
LINE GRAPH
What Kind of Graph is This?
Circle Graph
What Kind of Graph is This?
Bar Graph