METRICS

Measurements are relative!!

• Foot = human foot

• Inch = 3 barley corns

• Yard = nose to outstretched fingertip

• Mile = 1,000 paces

• Gallon = simply the name for a pail

Why is there a need for one system of measurement?

•Universal acceptance

•Accurate measurement

Do you know our current system?

• How many inches in a foot?

• How many feet in a yard?

• How many feet in a mile?

• How many ounces in a cup?

• How many cups in pint?

• How many pints in a quart?

Le Systeme International d’Unites

SI

7 Standard Metric Base Units• Unit of length (metre)

• Unit of mass (kilogram)

• Unit of temperature (kelvin)

• Unit of time (second)

• Unit of electric current (ampere)

• Unit of amount of substance (mole)

• Unit of luminous intensity (candela)

Measurements

• Length (m)

• Mass (kg)

• Volume (L)

• Temperature (K or C)

• Time (s)

English to Metric conversions

• 1 gallon = 3.78 liters• 1 pound = 453 grams• 1 inch = 2.54 centimeters• 1 foot = .3048 meters• 1 yard = .91 meters• 1 mile = 1, 609 meters•  1 tsp = 5 ml

Length Analogies

• 1 km = 5 city blocks (8 blocks = 1 mile)

• 1 hm = little longer than a football field 

• 1 dam= about the height of a 3-story building

• 1 m = length of a baseball bat or golf club

• 1 dm = nearly the length of a crayon

• 1 cm = width of little finger / pencil

• 1 mm = thickness of an ID card

Mass Analogies

• 1 kg = 2.2 lbs = approx. weight of textbook

• 1 hg = thin razor cell phone

• 1dag = 2 nickels

• 1 g = weight of a small paperclip

• 1dg = toothpick

• 1cg = adult housefly

• 1 mg = weight of a piece of dust

Volume Analogies • 1 kl = large aquarium

• 1 hl = helium tank

• 1 dal = medium-sized bucket

• 1 L = water bottle

• 1 dl = small-sized hair products

• 1 cl =

• 1 ml = single drop of liquid / teardrop

temperature kelvins degrees celsius degrees fahrenheit

symbol °K °C °F

boiling point of water 373.15 100. 212.

average human body temperature

  37. 98.6

average room temperature

  20. to 25. 68. to 77.

freezing point of water 273.15 0. 32.

absolute zero 0. -273.15 -459.67

Temperature Analogies

Celsius memory aid:

When it's zero it's freezing,when it's 10 it's not,

when it's 20 it's warm,when it's 30 it's hot!

Metric Conversions

KiloBig prefix

Means-Times 1000

HectoBig prefix

Means-Times 100

Deka

Big prefixMeans-

Times 10

X This is where the root of each prefix is.

This is one.

1 gram (g) – 1 meter (m) – 1 Liter (L)

DeciSmall prefix

Means-Divided by 10

CentiSmall prefix

Means-

Divided by 100

MilliSmall prefix

Means-

Divided by 1000

1 gram = _____ kg0.001

1 gram = _____ hg0.01

1 gram = _____ dag0.1

X_____ gram = 1 dg

0.001

0.1

.01_____ gram = 1 cg

_____ gram = 1 mg

1 gram = _____ kg0.001

1 gram = _____ hg0.01

1 gram = _____ dag0.1

_____ gram = 1 dg

0.001

0.1

0.01_____ gram = 1 cg

_____ gram = 1 mg

QU I Z Q U I Z

LENGTH

1 KILOMETER

approximately the length of 6 city blocks

 

1 HECTOMETER

little longer than a football field

 

1 DEKAMETER

about the height of a 3-story building

 

1 METER

about as long as a  baseball bat

about the height of the door handle from the floor

 

1 DECIMETER

nearly the length of a crayon

 

1 CENTIMETER

width of your pinky finger

 

1 MILLIMETER

thickness of a dime