1. Video #1 Unit 1 UNITS OF MEASUREMENT

2. THE BEAUTY OF THE METRIC SYSTEM Used globally Except US, Liberia, & Burma All 3 trade in metric units Based on powers of 10 allowing for simple unit conversions

3. MeasurementBase UnitAbbreviationInstrument LengthMetermRuler MassGramgBalance VolumeLiterLGraduated cylinder TemperatureKelvinKThermometer THE BASICS *Note: Beakers and flasks are inaccurate instruments for measuring volume. They are used mainly for storage, transferring chemicals, small reactions, and estimated amounts.  Temperature is often measured in the metric system’s old base unit: degrees Celsius.  Our classroom thermometers measure in degrees Celsius.  You’ll need to know this conversion: ˚C + 273 = Kelvin

4.  Rather than memorize relationships between related units, the metric system uses a series of prefixes added to its base units.  In the US: Americans memorize numbers and relationships of inches, feet, yards, and miles to length, like 5280 feet = 1 mile.  In Europe: Europeans learn a series of prefixes related to powers of 10 that add to the metric base units, like 10 = deca, 100 = hecto, and 1000 = kil0.  MANY prefixes exist to communicate very large measurements and very small measurements.  K-9 grade: kilo (10 3 ) to milli (10 -3 )  Now: tera (10 12 ) to femto (10 -15 ) METRIC SYSTEM PREFIXES

5.  Learning the prefixes in order of largest to smallest:  The good man King Henry died by drinking chocolate milk Monday night, poor fellow.  Creating a conversion tool to determine DIRECTION and NUMBER OF SPACES to move the decimal:  Summarize with this abbreviated list using “/” for decimal placeholders: T // G // M // k h D base d c m // µ // n // p // f TIPS IN APPLYING THE METRIC SYSTEM TeraGigaMegaKiloHectoDecaBaseDeciCentiMilliMicroNanoPicoFemto TGMKHDBasedcmµnpf 10 12 10 9 10 6 10 3 10 2 10 1 10 0 10 -1 10 -2 10 -3 10 -6 10 -9 10 -12 10 -15

6. T // G // M // k h D base d c m // µ // n // p // f Convert 3.66 decagrams to micrograms. Think about abbreviations: 3.66 Dg = __________ µg Find the given prefix on the line. Find the unknown prefix on the line. Note the direction that you’ll be moving FROM THE GIVEN TO THE UNKNOWN. Count the number of spaces that you’ll need to move. Don’t forget to count the placeholder lines if needed. METRIC CONVERSION EXAMPLE #1

7. T // G // M // k h D base d c m // µ // n // p // f Convert 458 nanoliters to centiliters. Think about abbreviations: 458 nL = __________ cL Find the given prefix on the line. Find the unknown prefix on the line. Note the direction that you’ll be moving FROM THE GIVEN TO THE UNKNOWN. Count the number of spaces that you’ll need to move. Don’t forget to count the placeholder lines if needed. METRIC CONVERSION EXAMPLE #2

8. T // G // M // k h D base d c m // µ // n // p // f Convert 0.33 terameters to kilometers. Think about abbreviations: 0.33 Tm = __________ km Find the given prefix on the line. Find the unknown prefix on the line. Note the direction that you’ll be moving FROM THE GIVEN TO THE UNKNOWN. Count the number of spaces that you’ll need to move. Don’t forget to count the placeholder lines if needed. METRIC CONVERSION EXAMPLE #3

9.  Scientific measurements sometimes require many zeros to report the answer. Zeros become confusing and nearly blur your vision as you read the number.  SCIENTIFIC NOTATION = method of abbreviating numbers that require many zeros  Format of scientific notation:  Example: 4.5x10 -5 or 3.2x10 13  Notice that ONLY 1 DIGIT PRECEDES THE DECIMAL.  Notice that the SUBSCRIPT MAY BE POSITIVE OR NEGATIVE.  Positive subscripts = move the decimal to the right adding zeros behind the number making it grow larger! + = BIG NUMBER  Negative subscripts = move the decimal to the left adding zeros in front of the number making it shrink smaller! - = SMALL NUMBER TOO MANY ZEROS

10.  Example 1: 4.5x10 -5  Example 2: 3.2x10 13 SCIENTIFIC NOTATION EXAMPLES