marvelous metric measurement! centimeter gram seconds milligram kilometer kilogram milliliter liter...
TRANSCRIPT
Marvelous Metric
MEASUREMENT!
centimeter
gramseconds
milligram
kilometer
kilogram
milliliter
liter
decimeter
Measurement
Quantitative or Qualitative?..think what it means when you say “quality over quantity”
• Measurement is QUANTITATIVE information– Quantitative=numerical– Qualitative=descriptive
MeasurementEach measurement represents a quantity
-quantity: something that has size/magnitude/amount
**5 grams (a measurement) represents:-mass (a quantity)
Every measurement has a number & a unit of measurement.-unit of measurement: compares what is being measured to a previously defined size
-liter, kilometer, gram etc.
• “The book is 65…”– NEEDS A UNIT OF MEASUREMENT!– Unit of measurement depends on the quantity being measured..
– If mass: the book is 65 milligrams -If length: the book is 65 centimeters
• “It is kilometers until we get there…”– NEEDS A NUMBER!– Down the street: 1 kilometer --To Pittsburgh: 90 kilometers
It is so American to try & be different…
The units of measurement we typically use-inches, miles, feet, pounds…are NOT STANDARD
Meaning what….?Ever traveled to another country?
SI units aka the International System of Measurement
SI units ARE international and are used universally.
• Plus…they are in lovely powers of 10 which make it nice &
easy to convert between quantities
• English System (ew) is only simple to convert with previous
knowledge…
• What about “foot” tells you how many “inches” are within it?
• What about “kilometer” tells you how many “meters” are within it?
Which quantities can we measure?
Length unit of measurement: meter (m)
mass unit of measurement: gram (g)
volume unit of measurement: liter (L)
passage of time unit of measurement: second (s)
temperature unit of measurement: Kelvin (K)
amount of substance unit of measurement: mole (mol)
Some SI base units are…. QUANTITY BASE UNIT SYMBOL
meter
Mass kg
kelvin K
Time s
Amount of substance mol
write this table into notes
Prefixesremember powers of 10..
•Mega---------1,000,000 times larger than the base unit (1,000,000x the size)
•Kilo------------1000 times larger than the base unit (1000x the size)
•BASE UNIT
•Deci-----------10 times smaller than the base unit (1/10 the size)
•Centi----------100 times smaller than the base unit (1/100 the size)
•Milli-----------1000 times smaller than the base unit (1/1000 the size)
•Micro-----1,00,000 times smaller than the base unit (1/1,000,000 the size)
•Nano---1,000,000,000 times smaller than the base unit (1/1,000,000,000 the size)
LENGTH• Instead of inches, foot, yard, mile (ew, gross)
• We use nanometer, micrometer, millimeter, centimeter, decimeter, meter, kilometer
which is easy. because the word __________ is in each!
Millimeter(mm)-thickness of a dime
There are _________ millimeters (mm) in a centimeter (cm).There are _________millimeters (mm) in a meter (m).There are _________millimeters (mm) in a kilometer (km).
centimeter (cm)-about the diameter of a school blouse button
There are __________centimeters (cm) in a meter (m).There are __________centimeters (cm) in a kilometer (km).
kilometer(km)-about the length of 5 city blocks
1 kilometer (km) is equal to __________ meters (m).1 kilometer (km) is equal to __________centimeters (cm).
What makes the most sense…• What would you measure your driveway in?
• What would you measure the width of your computer screen in?
• What would you measure the distance between you and your best friend’s house in?
• What would you measure the length of you fingernail in?
conversions cheat sheet
KILOMETER1km=1000m
1 m=1/1000km
CENTIMETER1 cm=1/100m
1m=100cm
MILLIMETER1mm=1/1000m
1 m=1000mm
“meter” “meter” “meter”
MASS• Instead of ounce, pound (ew, gross)
• We use milligram, gram, kilogram
which is easy. because the word __________ is in each!
milligram (mg) -mass of a very small snowflake
There are _________ milligrams (mg) in a gram (g).There are _________milligrams (mg) in a kilogram (kg).
kilogram(kg)-the mass of a typical text book
1 kilogram (kg) is equal to __________ grams (g).1 kilogram (kg) is equal to __________milligrams (mg).
What makes the most sense…• What would you measure your mass in?
• What would you measure the mass of your backpack in?
• What would you measure 20 grains of salt in?
• What would you measure a beaker in?
Volume
• Instead of teaspoon, tablespoon, ounce, cup, pint, quart, gallon
• We use milliliter, liter
which is easy. because the word __________ is in each!
What If What You are Measuring isn’t an exact amount of centimeters?
Report in decimals: 2.6 centimeters
just a little length lab..1.Measure your foot size (shoes stay on!!)
________cm
2. Measure the thickness (cover to cover) of your Chemistry book________cm
3. Measure the length of floor to doorknob________cm
4. Measure the length of one floor tile________cm
5. Measure the length of the room (both dimensions) ________cm (front to back) ____________cm (side to side)
just a little length lab..1.Measure your foot size (shoes stay on!!) ________cm
2. Measure the thickness (cover to cover) of your Chemistry book ________cm
3. Measure the length of floor to doorknob ________cm
4. Measure the area of one floor tile (cm x cm =cm2)
________cm2
5. Measure the length of the room (both dimensions) ________cm (front to back) ____________cm (side to side)
5. Measure your height ____________cm