measuring with scientific units
DESCRIPTION
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. MEASUREMENT: UNITS. REVIEW: LENGTH METER: distance REVIEW: VOLUME - PowerPoint PPT PresentationTRANSCRIPT
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Measuring With
Scientific Units
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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
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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
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MEASUREMENT: UNITS
• REVIEW: LENGTHMETER: distance
REVIEW: VOLUMELITER: Volume = length x width x height =
cm3
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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
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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
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MEASUREMENT: UNITSDENSITY• GRAMS PER VOLUME:
density• Density = AMOUNT OF MASS
PER VOLUME= grams / milliliter= grams / cm3
= MASS / VOLUMEPURE WATER = 1g / mL
LEAD = 11g / mL
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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
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MEASUREMENT: PREFIXES
king hector doesn’t buy dragons costing millions
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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
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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
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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