THE METRIC SYSTEM

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THE METRIC SYSTEM

• A Global System of Measurement

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Introduction

• Definition- A system of measurement units used
  all over the world.
• Same Language
• Measure anything
• Base 10 system
• Base units
• Move decimal left or right to convert between
  units.
• Prefixes change the units by a factor of 10.

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Length

• DEFINITION measurement of distance from one
  point to another
• Unit- Meter (m)
• Equipment- meter stick and metric ruler

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Length Tips

• Make sure you start at the 0 mark, NOT at the end
  of the metric ruler or meter stick.
• Read the meter stick by counting the large,
  numbered tick marks as centimeters and by reading
  the small, unnumbered marks as millimeters.

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LengthEquivalents
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LengthEstimates
Pinkie
Step
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Mass/Weight

• DEFINITION
• Mass- a measurement of the amount of matter that
  makes up and object
• Weight- a measurement of the effect of gravity on
  an object
• Unit- gram (g)
• Equipment- triple beam balance, spring scale

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Mass/WeightMeasurements
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Mass/WeightMeasurements

• Direct measurement- for solid objects
• Indirect Measurement- for liquid objects
• Tips-
• Make sure your balance is zeroed out before
  beginning to measure by turning the knob.
• Get down at eye level to read the balance.

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Mass/WeightEquivalents
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Mass/WeightEstimates
Pineapple
Dollar Bill
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Volume

• DEFINITION the amount of space an object takes
  up
• Unit- liter (L), cubic centimeter (1 mL 1
  cm3)
• Equipment- graduated cylinder, beaker,
  micropipettes
• Measurements
• Direct When measuring Volume of a liquid.
• Place the liquid into the graduated cylinder.
• Tips
• Get down at eye level to read the graduated
  cylinder
• Read the cylinder at the bottom of the meniscus.

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VolumeMeasurements
The volume of this liquid is 66mL
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Water Displacement

• Water Displacement-When measuring the volume of a
  solid object
• Get a beaker with water that the object can be
  fully submerged in.
• Record the water level in the beaker before the
  object is in the water.
• Then, place the object in the water.
• Record the new height of the water in the beaker
• Take the new height of water and subtract the
  original height of the water from it
• The answer is the volume of the object

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VolumeEquivalents
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VolumeEstimates
Coke
Mentos
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Time

• DEFINITION a measure of change
• Unit second (s)
• Equipment stopwatch, clock
• Equivalents

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Temperature

• DEFINITION A measure of the average amount of
  heat contained in an object
• Unit Celsius (C)
• Equipment thermometer
• Standard Equivalents

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TemperatureEstimates

• Room Temperature 68?F 20?C
• Water Freezes At 32?F 0?C
• Water Boils At 212?F 100?C

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Density

• DEFINITION the amount of matter in a given
  amount of space.
• Unit Grams per milliliter (g/mL) and Grams per
  Centimeter cubed (g/cm3)
• Equipment No direct measurement can be measured,
  must be calculated.

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DensityEstimates
Brick
Pillow
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Speed

• DEFINITION the change in position over time.
• Unit meters per second (m/s), kilometers per
  hour (km/hr)
• Estimate 1.3 m/s normal walking pace 62 mi/hr
  100 km/her
• Equipment No direct measurement can be measured,
  must be calculated.
• Equivalents