metric system or système international d unitès (si units) objective 1.1

Metric System or Système Metric System or Système International d’ Unitès (SI Units)International d’ Unitès (SI Units)

Objective 1.1Objective 1.1

Why are System International Why are System International Units important to me?Units important to me?

They are used by other countries.They are used by other countries. By 2009 all products in Europe will be By 2009 all products in Europe will be

required to have only SI units. required to have only SI units. Currently the US has dual labeling but with a Currently the US has dual labeling but with a

global market that may change.global market that may change. All scientists use SI units.All scientists use SI units. All of our work will measured in SI units.All of our work will measured in SI units.

Introduction to the Metric System:Introduction to the Metric System: A.A. There are four standard units of metric There are four standard units of metric

measurement that we will be working with in class.measurement that we will be working with in class. 1.1. These units will be used to measure length, These units will be used to measure length,

volume, mass and temperature.volume, mass and temperature. a.a. The unit for length is the ...The unit for length is the ... metermeter b.b. The unit for volume is the ...The unit for volume is the ... liter.liter. c.c. The unit for mass is the … The unit for mass is the … gram.gram. d. The unit for temperature is …d. The unit for temperature is … Celsius Celsius 0° C water freezes 0° C water freezes 100° C water boils100° C water boils

Introduction to the Metric System (cont.):Introduction to the Metric System (cont.): B.B. There are prefixes that can be attached to meter, liter, and There are prefixes that can be attached to meter, liter, and

gram that will change the value of the unit making it either larger or gram that will change the value of the unit making it either larger or smaller.smaller.

1.1. The prefix kilo- increases the standard unit by 1,000 The prefix kilo- increases the standard unit by 1,000 times.times.

1000 meters = 1 kilometer1000 meters = 1 kilometer

2.2. The prefix deci- decreases the standard unit by 10 The prefix deci- decreases the standard unit by 10 times.times.

1 liter = 10 deciliters1 liter = 10 deciliters

3.3. The prefix centi- decreases the standard unit by 100 The prefix centi- decreases the standard unit by 100 times.times.

1 gram = 100 centigrams1 gram = 100 centigrams

Introduction to the Metric System (cont.):Introduction to the Metric System (cont.): 4.4. The prefix milli- decreases the The prefix milli- decreases the

standard unit by 1,000 standard unit by 1,000 times.times. 1 meter = 1,000 millimeters1 meter = 1,000 millimeters

5.5. The prefix micro- decreases the The prefix micro- decreases the standard unit by1,000,000 standard unit by1,000,000 times.times.

1 liter = 1,000,000 microliters1 liter = 1,000,000 microliters

Introduction to the Metric System (cont.):Introduction to the Metric System (cont.):

King Henry Died Monday Drinking Chocolate Milk King Henry Died Monday Drinking Chocolate Milk

(k) (h) (da) (unit) (d) (c) (m)(k) (h) (da) (unit) (d) (c) (m)

•Using the above acronym we can remember the order of the units starting with the largest King (kilometer) and going all the way down to the smallest Milk (millimeter).

kilo kilo 1,000 x1,000 x

basebase

unitunit

hectohecto100 x100 x

basebase

unitunit

decadeca10 x10 x

basebase

unitunit

Base UnitsBase Units

MeterMeter

LiterLiter

GramGramdecideci.1 or.1 or

1/101/10thth of of

base unitbase unit

centicenti.01 or.01 or

1/1001/100thth of of base unitbase unit

millimilli.001 or.001 or

1/1,000th 1/1,000th of baseof base

unitunit

Larger than base unit Smaller than base unit

Introduction to the Metric System (cont.):Introduction to the Metric System (cont.):

These prefixes are based on powers of 10 These prefixes are based on powers of 10 or base 10. What does this mean?or base 10. What does this mean?

From each prefix every “step” is either:From each prefix every “step” is either:

10 times larger10 times larger

oror

10 times smaller10 times smaller

For exampleFor example

Centimeters are 10 times larger than Centimeters are 10 times larger than millimetersmillimeters

1 centimeter = 10 millimeters 1 centimeter = 10 millimeters

Objective 1.1 Vocabulary QuizObjective 1.1 Vocabulary Quiz

1. What does SI stand for?1. What does SI stand for?

Système International d’ Unitès.Système International d’ Unitès.

2. What does a meter measure?2. What does a meter measure?

A meter is the base unit of measure for A meter is the base unit of measure for length.length.

3. What is a centimeter?3. What is a centimeter?

A centimeter is 1/100A centimeter is 1/100thth of a meter, or in of a meter, or in decimal form 0.01 or a meter. decimal form 0.01 or a meter.

4. What is a unit?4. What is a unit?

A unit is a measurement.A unit is a measurement.

5. What is a millimeter?5. What is a millimeter?