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Published byBerniece Shelton Modified over 5 years ago

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Measurement Measurement SI Standard System of International Units or Metric System Uses 10 as a base Always estimate one unit/place further than what your measuring device allows

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Direct Instruments Direct Measurements Can be made with no calculations It is recorded in one step

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Length Length SI unit is the meter (m) 1 km =.6 miles or 1 mile = 1.6 km (p.909) Instrument: Ruler or Meter Stick

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Mass Mass: a measure of an object’s matter; depends on the atoms that make up the object; SI Unit: Kilogram (kg) Instrument: Triple Beam Balance or Scale

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Weight Weight a measure of the gravitational force on an object Unit: Newton (N) Instrument: Spring Scale

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Temperature Temperature: a measure of the average movement of particles for a given object; Unit: Degrees Kelvin (K) or Celsius (C) Instrument: Thermometer

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Temperature Temperature: Conversions: 0C = 5/9 (F-32) 0C = 5/9 (F-32) 0F = 9/5 C+32 0F = 9/5 C+32 Kelvin = C+273 Kelvin = C+273

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Volume Volume: a measure of the space occupied by an object; Unit: Liter (L)* Instrument: Graduated Cylinder

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Time Time: Unit: Second (s or sec) Instrument: Stopwatch or clock

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Derived Measurements Derived Quantities Must be calculated Cannon be recorded in one step

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Density Density: a measure of the amount of matter that occupies a given volume; Formula: Mass divided by Volume (m/v) Unit: grams per cubic centimeter Instrument: Balance and Ruler or Meter Stick

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Area Area: a measure of surface within a given set of boundaries; Formula: Length x Width (L x W) Unit: meters squared (m 2 ) Instrument: Ruler or Meter Stick

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Volume Volume of a Solid Formula: (L x W x H) Unit: meters or centimeters squared Instrument: Ruler or Meter Stick

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Speed Speed Formula: Distance divided by Time (d/t) Unit: Meters per Second Instrument: Ruler or Meter Stick and Stopwatch

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Scientific Notation Used to express a number as a multiplier and power of ten Digit term - must be between 1 and 9 Digit term - must be between 1 and 9 Power term – 10 raised to a whole number Power term – 10 raised to a whole number Ex. 100 or 1x10 2 ; 0.039 or 3.9x10 -2 You try: 12500000 You try: 2.87x10 6

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Metric Conversions Converting from one prefix to another or from a base unit to a prefix Example: How many centimeters in a meter? How many centimeters in a meter? How many centimeters in a kilometer? How many centimeters in a kilometer?

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Unit Converter

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Example To convert 1000 milligrams to grams, you are moving which way on the stairs? UP If you are up you must… Move the decimal LEFT How many places will you move? 3333 Answer

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Answer Since you are moving three steps up, then you will move left three times 1000 is what you start with 1000 is what you start with When the decimal is moved left three times: 1g When the decimal is moved left three times: 1g

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3 Questions to Ask Which way are you moving on the steps? Are you moving up or down? How many steps?

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Examples Work Quietly on these Problems How many grams are in 5 kilograms? How many kilometers are in 25.0 meters How may centimeters are in 45.0 hectometers? Write in regular notation and scientific notation Write in regular notation and scientific notation

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