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Overview of Metric System. System of measure used by scientists around the world Uses prefixes and suffixes Suffixes Meter – tells us we are measuring distance, L,W,H Liter – tells us we are measuring liquid volume Gram – tells us we are measuring mass Prefixes Kilo = 1000 Hecto = 100

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overview of metric system
Overview of Metric System
  • System of measure used by scientists around the world
  • Uses prefixes and suffixes
    • Suffixes
      • Meter – tells us we are measuring distance, L,W,H
      • Liter – tells us we are measuring liquid volume
      • Gram – tells us we are measuring mass

Prefixes

Kilo = 1000

Hecto = 100

Deka = 10

Deci = 1/10

Centi = 1/ 100

Milli = 1 / 1000

distance
Distance
  • Measures length, width, and height
  • Distance is measured in centimeters (cm) and millimeters

(mm)

  • Meter sticks and rulers are tools used for measuring distance
  • 10 mm equal 1 cm. This allows to quickly change from mm to cm and back.
  • To move from mm to cm, move decimal one place left.
    • Example – 10.0 mm = 1.0 cm
  • To move from cm to mm, move decimal one place right
    • Example – 1.0 cm = 10.0 mm
volume
Volume
  • Volume measures how much space something occupies
  • There are three types of volume:
    • Volume of a liquid – (ml)
    • Volume of solids – (cm cubed)
      • Volume of a straight sided solids
      • Volume of an irregularly shaped solids
liquid volume
Liquid Volume
  • Measures how much space a liquid occupies
  • Liquid volume is measured in milliliters (ml)
  • Graduated cylinders and beakers are tools used to measure liquid volume
  • Graduated cylinders are graduated or marked so that we can measure liquid volume
  • The top of a liquid in a graduated cylinder will bend slightly. This is called a Meniscus Line. Always read a meniscus line from its lowest point
volume of straight sided solids
Volume of Straight Sided Solids
  • Measures how much space a straight sided object takes up
  • Equation to find volume:
    • Length x Width x Height
    • Volume of solid object is always cubed
    • Volume of the cube below equals: 5 x 5 x 5 = 125 cm cubed
volume of irregularly shaped solids
Volume of irregularly shaped solids
  • Displacement Volume
    • Found by submerging the object in water.
    • The amount of water that is moved, or displaced, tells us the volume of the object
  • A graduated cylinder or beaker is required
  • Equation is:
    • Final Water Level - Initial Water Level = Volume of object in ml
    • Convert ml to cm cubed: 1 ml = 1 cm cubed
slide7
Mass
  • Measures how much something weighs
  • Mass is measured in grams
  • Electronic scales are a tool used to measure mass
density
Density
  • Defined as the amount of mass in a given volume.
  • Equation to find density is mass / volume.
perimeter area volume
Perimeter, Area, Volume
  • P = S + S + S + S
    • (add all sides of object)
    • P = 5 + 5 + 5 + 5 = 20 cm
  • A = S x S
    • (always squared)
    • A = 5 x 5 = 25 cm squared
  • V = Length X Width X Height
    • (volume is always cubed for solids)
    • V = 5 x 5 x 5 = 125 cm cubed
metric ladder
Metric Ladder

Prefixes can be used with all three measuring base words: meter (distance), liter (liquid volume), gram (mass). Base words are found in the middle of the metric ladder.

Example: kilometer, hectoliter, centigram

As you move left numbers get larger, as you move right numbers get smaller

metric conversions
Metric Conversions
  • Use the metric ladder as your guide
  • Find your starting point and your end point on the ladder
  • Count the number of spaces to move from your starting point to your end point
  • Decide if you moved right or left on the ladder
  • Move the decimal the same number of spaces that you moved and in the direction that you moved
    • Example to convert from millimeter to decimeter you would move the decimal point two places to the left
    • 100 mm equals 1.00 dm
temperature
Temperature
  • Measures how hot or cold something is
  • Temperature is measured in degrees Celsius or degrees Fahrenheit
  • Thermometers are a tool used to measure temperature
temperature scales
Temperature Scales
  • Celsius Scale
  • 0 is freezing and 100 is boiling
  • Fahrenheit Scale
  • 32 is freezing and 212 is boiling
temperature conversions
Temperature Conversions
  • Celsius to Fahrenheit
  • F = (C x 1.8) + 32
  • Fahrenheit to Celsius
  • C = ( F - 32 ) / 1.8
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