metrics measurements are relative!! foot = human foot inch = 3 barley corns yard = nose to...
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METRICS
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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
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Why is there a need for one system of measurement?
•Universal acceptance
•Accurate measurement
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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?
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Le Systeme International d’Unites
SI
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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)
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Measurements
• Length (m)
• Mass (kg)
• Volume (L)
• Temperature (K or C)
• Time (s)
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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
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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
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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
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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
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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!
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Metric Conversions
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KiloBig prefix
Means-Times 1000
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HectoBig prefix
Means-Times 100
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Deka
Big prefixMeans-
Times 10
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X This is where the root of each prefix is.
This is one.
1 gram (g) – 1 meter (m) – 1 Liter (L)
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DeciSmall prefix
Means-Divided by 10
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CentiSmall prefix
Means-
Divided by 100
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MilliSmall prefix
Means-
Divided by 1000
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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
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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
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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