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Measuring ze

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What is

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Systeme Internationale dUnites (or International System of Units) Abbreviated SI (System of International Measures) It is the internationally accepted standard units of measure. Formerly known as…

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The Metric System

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The SI Base Units are… What it measuresBase Unit LengthMeter (m) MassKilogram (kg) VolumeLiter (l or L or ) TimeSeconds (s) TemperatureKelvin (K) Amount of a substanceMole (mol) Electric CurrentAmpere (A) Luminous IntensityCandela (cd)

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Basic units of the SI system: Length = meters (m) Mass = gram (g) Volume = liter (L or l)

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The SI System Im ten times better than the way you measure now!

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Lets see why… Fill in the blanks (do the math mentally): 13 miles = ____yards ____feet ____inches 2 1/2 gallons =____quarts ____pints ____cups ____ounces (22,880 yds) (68,640 ft.) (823,680 in) (10) (20 p) (40 cups) (320 ounces)

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That was not the SI system! What number is the SI system based on?

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Lets see why 10 is an easy base to use.

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Multiply each of the following numbers by x 10 = 235 x 10 = 12.4 x 10 = 43.2 x 10 = x 10 =

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Multiply each of the following numbers by x 10 = x 10 = 12.4 x 10 = 43.2 x 10 = x 10 =

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Multiply each of the following numbers by x 10 = x 10 = x 10 = 43.2 x 10 = x 10 =

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Multiply each of the following numbers by x 10 = x 10 = x 10 = x 10 = x 10 =

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Multiply each of the following numbers by x 10 = x 10 = x 10 = x 10 = x 10 =

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Multiply each of the following numbers by x 10 = x 10 = x 10 = x 10 = x 10 =

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Multiply each of the following numbers by x 100 = 235 x 100 = 12.4 x 100 = 43.2 x 100 = x 100 =

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Multiply each of the following numbers by x 100 = x 100 = 12.4 x 100 = 43.2 x 100 = x 100 =

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Multiply each of the following numbers by x 100 = x 100 = x 100 = 43.2 x 100 = x 100 =

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Multiply each of the following numbers by x 100 = x 100 = x 100 = x 100 = x 100 =

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Multiply each of the following numbers by x 100 = x 100 = x 100 = x 100 = x 100 =

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Multiply each of the following numbers by x 100 = x 100 = x 100 = x 100 = x 100 = 85356

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =.8465

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =

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Divide each of the following numbers by = = = = =.08465

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Nice Job! If you can multiply & divide by 10 (or any power of 10), then the metric system will be easy for you.

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Checkpoint: Metric units are based on multiples of what number? Metric units are based on multiples of 10 Multiply--Move the decimal to the right Divide--Move the decimal to the left

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Scientists created different sized units of measure by adding prefixes to the base units. Its kind of like using a cup as a basic measure and using 1/2 a cup, 1/4 of a cup, or 1/3 of a cup for the smaller measures.

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PrefixSymbol Numerical value in Base units Power of 10 value GigaG 1,000,000, MegaM 1,000, Kilo-k Hecto-h Deka-da Base Unit Deci-D Centi-c Milli-m Nanon PicoP The SI Prefixes

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What is length? Length is the distance from one point to another

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The basic unit of length in the SI system is the … meter

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Pause… How big do you think a meter is? Find something you think is a meter in length.

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THE METER The meter is the starting point for measuring length in the metric system. START

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Heres a meter stick!

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It takes 10 decimeters to make up 1 meter.

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It takes 10 centimeters to make up 1 decimeter.

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If 1 meter = 10 decimeters and 1 decimeter = 10 centimeters, then how many centimeters make up 1 meter?

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Thats right! 1 meter = 100 centimeters

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100centimeters = 1 meter

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It takes 10 millimeters to make up 1 centimeter. Boy, thats small!

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If 1 meter = 10 decimeters and 1 decimeter = 10 centimeters and 1centimeter = 10 millimeters then how many millimeters make up 1 meter?

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Thats right! 1000 millimeters = 1 meter

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It takes 10 millimeters to make up 1 centimeter. Millimeters are so small that they almost run together.

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Checkpoint One centimeter is divided into how many millimeters? 10 millimeters (mm)

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Now lets take a closer look at some measuring devices.

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This is a magnified image of a ruler/meter stick. 1 This is one centimeter. 234

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This is a magnified image of a ruler/meter stick. 1 This is half of a centimeter. 234

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This is a magnified image of a ruler/meter stick. 1 This is one millimeter. 234

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1234 This key measures 3 cm.

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1234 Or you could say that it measures 30 mm.

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1234 This key measures 2.5 cm.

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1234 Or, you could say that it measures 25 mm.

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1234 This toy car measures 4.2 cm.

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1234 Or, you could say it measures 42 mm.

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The metric system deals with powers of 10 1 meter = 10 decimeters = 100 centimeters = 1000 millimeters

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How many centimeters make up 2 meters?

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Thats right! There are 200 centimeters in 2 meters.

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How many millimeters make up 2 meters?

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Thats right! There are 2000 millimeters in 2 meters.

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How many decimeters make up 2 meters?

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Thats right! There are 20 decimeters in 2 meters.

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The metric system really is 10 times better than our standard system of measurement. It is very easy to convert from one unit to another.

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You must simply multiply by 10, 100, or OR You must simply divide by 10, 100, or 1000.

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The end.

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