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 (l)the distance between two

points

Base Unit: m

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).

meter (m)-about the height of a doorknob

one meter

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 (m)Measure of the quantity of matter

Base Unit: kg

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).

gram(g)-about the mass of a dime

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(V)The amount of space occupied by an

object

Base Unit: m3

Volume

• Instead of teaspoon, tablespoon, ounce, cup, pint, quart, gallon

• We use milliliter, liter

which is easy. because the word __________ is in each!

Volume

• 1 m3 = 1 000 000 cm3

– large amount!

• 1 L = 1000 cm3

– thus 1mL =1cm3

Volume

• 1 milliliter (mL) is equal to __________ liters (L).

Length Measurement

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)

BEWARE!

the EVIL inches..do NOT mistake them for our super 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 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