Measurements The Metric system was developed in France during the Napoleonic reign of France in the 1790's.

“Weights and measures may be ranked among the necessaries of life to every individual of human society…They are necessary to every occupation of human industry.... The knowledge of them, as in established use, is among the first elements of education...” JOHN QUINCY ADAMS - Report to the Congress, 1821

Which other countries, besides the U.S., do not use the metric system? STAT FACT Which other countries, besides the U.S., do not use the metric system? Only a few small countries (Liberia and Myanmar) , including some Caribbean nations heavily influenced by the U.S., have not formally adopted the use of SI. Among countries not claiming to be metric, the U.S. is the only significant holdout.

In any measurement system,It… must be agreed upon and cannot change Ex: The foot.

Le Systeme Internationale d’Unites (SI) 1960- SI system Based on Metric System

Standards 5 In a measurement system there are exact quantities that people agree to use for a certain measurement. Ex: The meter The speed that light travels in a vacuum 1/299 792 458 of a second. Why...This seems CRAZY!!! The meter Clip

Another Example of a Standard …..The kilogram The official kilogram, made of platinum-iridium, remains in France at the International Bureau of Weights and Measures Clip

Le Systeme Internationale d’Unites (SI) English: International System of Units Each measurement has a base unit.

Based on multiples of ten. SI System Based on multiples of ten. Examples of base units Length Meter Mass Gram Volume Liter Time Second Temperature -Kelvin Energy -Joule Electric Current -Ampere

Base Units EX: 1 Liter= 1000ml 1 gram = 1000mg 1meter= 1000mm

Based on Multiples of TEN Prefixes Prefixes are used with the base units to indicate what multiple or fraction of ten should be used. Multiple of BU Fraction of BU King Henry Died Drinking Choc. Milk Kilo- Hecto- Deca- BU Deci- Centi- Milli- k h D d c m BASE UNIT 1000x 0.1 0.01 100x 10x 0.001 Meter Liter Gram Watt Newton Second Joule Based on Multiples of TEN

Metric Conversions A conversion is changing the way you state the same amount! Ex: 1 dollar 4 quarters, 100 pennies, 10 dimes 1meter = 100centimeters Simply move your decimal point.

Laboratory Apparatuses for making Measurements

LENGTH Distance

Meter Stick 1m = 100 Centimeters 1m = 1000 millimeters Length Distance 1m = 100 Centimeters 1m = 1000 millimeters 1cm = 10 mm Each line on the meter stick is a millimeter.

Meter Stick The last digit in all measurements is an estimate digit.

Amount of matter in an object MASS Amount of matter in an object

Triple Beam Balance Grams

Space occupied by an Object VOLUME Space occupied by an Object

Length x Height x Width =Volume

Graduated Cylinder Volume Space an object occupies

TEMPERATURE Kinetic Energy

Temperature Fahrenheit vs. Celsius vs. Kelvin Absolute Temperature scale Lord Kelvin (1824-1907) 1742, Anders Celsius (1701-1744) 1714:Daniel Gabriel Fahrenheit (1686-1736) Absolute Zero: temperature at which all matter stops moving. Superfridge Video Clip

Practice: Temperature Conversion: 1) 250 Kelvin to ºCelsius 2) 339 Kelvin to ºCelsius 3) 17º Celsius to Fahrenheit 4) 55º Celsius to Fahrenheit 5) 89.5º Fahrenheit to Celsius 6) 383º Kelvin to Fahrenheit

Temperature Conversion Answers    1) -23 ºC             2) 66 ºC             3)            4)              5) 31.9 ºC                    6) 230 ºF

Starter: How many ml are in 1 kl? If I have 3475.8 L, how many ml do I have? What is a standard? What are some units for volume? (give 2) What is an independent variable? What is mass? Marsha has three 2-L sodas. How many ml does she have total? If there are six people at dinner, how many ml can they each have (and it be equal amounts)??

DENSITY Mass per unit Volume

Density Density: Amount of matter in a specific volume. These 2 cubes have the same VOLUME, but they have different densities. Why?

Density practice problem Which cylinder has the greatest density? So, if I had the same amount of each cylinder (1 ml), which one would have a greater mass?? Vol: 5 ml Mass: 10g Vol: 25 ml Mass: 15 ml Density = 2 g/ml Density = 1.7 g/ml

Derived Units Obtained by combining different units. Ex: Density 30 Obtained by combining different units. Ex: Density Density is the amount of mass per unit volume. D = m/v

TYPES OF DATA Quantitative vs. Qualitative 31 TYPES OF DATA Quantitative vs. Qualitative If the data collected involve observations without measurements or numbers, then it is referred to as qualitative data. Quantitative data involves numbers or measurements.