Measuring With
Scientific Units
MEASUREMENT
• MEASUREMENT• Measurement is in NUMBERS
and UNITS.• Most of the world uses the
METRIC SYSTEM– Based on the ‘NUMBER TEN’ – Based on the METER
MEASUREMENT: SYMBOLS
Base quantity Name Symbol
Length meter m
Mass gram g
Time seconds s
electric current Ampere A
temperature Celsius oCamount of substance Mole molluminous intensity Candela Cd
MEASUREMENT: UNITS
• REVIEW: LENGTHMETER: distance
REVIEW: VOLUMELITER: Volume = length x width x height =
cm3
MEASUREMENT: UNITS
WEIGHT AND MASSGRAM: mass & weight• WEIGHT depends on WHERE YOU ARE IN
THE UNIVERSE– Changes depend on GRAVITY
• Mass depends on THE NUMBER AND TYPE OF ATOMS– ALWAYS STAYS THE SAME
MEASUREMENT: UNITS
• TEMPERATURE AND TIMECELSIUS: temperature• TEMPERATURE measures AMOUNT OF
HEAT– WHAT IS YOUR BODY TEMPERATURE?– 98.6 degrees Fahrenheit– 37 degrees Celsius
SECONDS: time• TIME measures ORDER OF EVENTS
MEASUREMENT: UNITSDENSITY• GRAMS PER VOLUME:
density• Density = AMOUNT OF MASS
PER VOLUME= grams / milliliter= grams / cm3
= MASS / VOLUMEPURE WATER = 1g / mL
LEAD = 11g / mL
MEASUREMENT: PREFIXES
Prefix Symbol
Factor Number Factor Word
kilo k 1,000 units Thousandhecto h 100 units Hundreddeca da 10 units Ten
Base unit m, g, L 1 unit meter, gram, Liter
deci d 1/10 unit Tenthcenti c 1/100 unit Hundredthmilli m 1/1,000 unit Thousandth
micro 1/1,000,000 unit Millionth
MEASUREMENT: PREFIXES
king hector doesn’t buy dragons costing millions
CONVERSIONS
Conversions are easy because they’re BASED ON THE NUMBER TEN
• Just MOVE THE DECIMAL!Setting up the Divisionsk h da base d c m1,000 units 100 units 10 units 1 unit 1/10 unit 1/100 unit
1/1,000 unit
CONVERSIONS
k h da base d c m1,000 units 100 units 10 units 1 unit 1/10 unit 1/100 unit 1/1,000 unit
• If you’re going from SMALL amounts to LARGE amounts, move the decimal TO THE LEFT
• 300 centimeters = 3.00 meter• 56 liters = ______ kiloliters? • .056 kL• 82.3 milligrams = _______ decigrams?• .823 dg
CONVERSIONS
k h da base d c m1,000 units 100 units 10 units 1 unit 1/10 unit 1/100 unit 1/1,000 unit
• If you’re going from LARGE amounts to SMALL amounts, move the decimal TO THE RIGHT
• 95 grams = 95,000 milligrams• 20.5 decameters = _________ meters?• 205 m• 6.82 liters = .0682 cL centiliters?
• Good job! 682 cL