Metrics SI Units Standards of Measurement Standard an

Standards of Measurement Standard – an exact quantity that people agree to use for

Measurements & SI Units Variable Measured SI Unit Symbol Length Meter m Mass Kilogram

Measurements Metric prefixes aid us in measuring very large or small quantities All measurements

King Henry Died (by) Drinking Chocolate Milk Kilo- Hecto- Convert Deka- BASE UNIT (Meter,

Moving the decimal? ? Since the metric system is based on factors of TENS,

Convert 1453. 2 m. L into L Kilo- Hecto- Deka- BASE UNIT Deci- Centi-

Another example. . . Convert 0. 6423752 kg into mg Kilo- Hecto- Deka- BASE

Practice: Question #1 Question #2 72. 95 cm = _______m 3713. 2 m =

Derived units Sometimes SI units can be combined to create derived units EXAMPLE ◦

Terms to Know Volume ◦ The amount of space occupied by an object ◦

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Metrics & SI Units

Standards of Measurement Standard – an exact quantity that people agree to use for comparison In Science, all countries use SI Units or the metrics system of measurement

Measurements & SI Units Variable Measured SI Unit Symbol Length Meter m Mass Kilogram kg Temperature Kelvin K Time Second s Amount of a substance Mole mol Electric current Ampere A

Measurements Metric prefixes aid us in measuring very large or small quantities All measurements consist of ◦ a number ◦ a unit

King Henry Died (by) Drinking Chocolate Milk Kilo- Hecto- Convert Deka- BASE UNIT (Meter, Liter, Gram) deci- centi- milli- from one unit prefix to another by moving the decimal the appropriate number of spaces in a given direction

Moving the decimal? ? Since the metric system is based on factors of TENS, we are able to simply move decimals when converting from one unit to another. But… WHAT are we doing when we move the decimal? ◦ If you move the decimal to the RIGHT you are MULTIPLYING your number by a factor of TEN ◦ If you move the decimal to the LEFT you are DIVIDING your number by a factor of TEN

Convert 1453. 2 m. L into L Kilo- Hecto- Deka- BASE UNIT Deci- Centi- Milli- (Meter) Move the decimal THREE places to the LEFT… You are DIVIDING BY 1000 1453. 2 m. L = 1. 4532 L

Another example. . . Convert 0. 6423752 kg into mg Kilo- Hecto- Deka- BASE UNIT Deci- Centi- Milli- (gram) Move the decimal SIX places to the RIGHT… You are MULTIPLYING BY 1, 000 0. 6423752 kg = 642375. 2 mg

Practice: Question #1 Question #2 72. 95 cm = _______m 3713. 2 m = ______km 72. 95 cm = 0. 7295 m 3713. 2 m = 3. 7132 km

Derived units Sometimes SI units can be combined to create derived units EXAMPLE ◦ Volume = length x width x height = cm 3 ◦ Density = mass = g/m. L volume ◦ Speed = meters = m/s second

Terms to Know Volume ◦ The amount of space occupied by an object ◦ Can either use the formula or a method known as volume or water displacement. Mass ◦ The amount of matter in an object Density ◦ The amount of matter in a particular amount of space