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THE METRIC SYSTEMTHE METRIC SYSTEMA Global System of MeasurementA Global System of Measurement
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IntroductionIntroduction
Definition- A system of Definition- A system of measurement measurement units units used all over the world.used all over the world.Same Same “Language”“Language”Measure anythingMeasure anything
Base 10 systemBase 10 systemBase unitsBase unitsMove Move decimaldecimal left or right to convert between left or right to convert between
units.units.Prefixes change the units by a factor of Prefixes change the units by a factor of 1010..
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LengthLength
DEFINITIONDEFINITION: measurement of : measurement of distancedistance from one point to anotherfrom one point to another
UnitUnit- Meter (m)- Meter (m)
EquipmentEquipment- meter stick and metric - meter stick and metric rulerruler
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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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LengthLengthEquivalentsEquivalents
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LengthLengthEstimatesEstimates
Pinkie
Step
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Mass/WeightMass/Weight
DEFINITIONDEFINITION: :
Mass- a measurement of the Mass- a measurement of the amount amount ofof mattermatter that makes up and object that makes up and object
Weight- a measurement of the Weight- a measurement of the effect effect ofof gravity gravity on an objecton an object
UnitUnit- gram (g)- gram (g)
EquipmentEquipment- triple beam balance, spring - triple beam balance, spring scalescale
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Mass/WeightMass/WeightMeasurementsMeasurements
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Mass/WeightMass/WeightMeasurementsMeasurements
Direct measurement- for Direct measurement- for solidsolid objects: objects:
Indirect Measurement- for Indirect Measurement- for liquidliquid objects: objects:
TipsTips- -
Make sure your balance is Make sure your balance is zeroedzeroed out out before beginning to measure by before beginning to measure by turning the knob.turning the knob.
Get down at Get down at eye leveleye level to read the to read the balance.balance.
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Mass/WeightMass/WeightEquivalentsEquivalents
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Mass/WeightMass/WeightEstimatesEstimates
Dollar Bill
Pineapple
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VolumeVolume
DEFINITIONDEFINITION: the amount of : the amount of spacespace an object takes up an object takes up
UnitUnit- liter (L), cubic centimeter (***1 mL = 1 cm- liter (L), cubic centimeter (***1 mL = 1 cm33***)***)
EquipmentEquipment- graduated cylinder, beaker, micropipettes- graduated cylinder, beaker, micropipettes
MeasurementsMeasurements Direct: When measuring Volume of a Direct: When measuring Volume of a liquid.liquid. Place the liquid into the graduated cylinder.Place the liquid into the graduated cylinder.
Tips:Tips: Get down at Get down at eye leveleye level to read the graduated cylinder to read the graduated cylinder Read the cylinder at the bottom of the Read the cylinder at the bottom of the meniscusmeniscus..
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VolumeVolumeMeasurementsMeasurements
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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VolumeVolumeEquivalentsEquivalents
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VolumeVolumeEstimatesEstimatesMentos
Coke
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TimeTime
DEFINITIONDEFINITION: a measure of : a measure of changechange
UnitUnit: second (s): second (s)
EquipmentEquipment: stopwatch, clock: stopwatch, clock
EquivalentsEquivalents::
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TemperatureTemperature
DEFINITIONDEFINITION: A measure of the average : A measure of the average amount ofamount of heatheat contained in an object contained in an object
UnitUnit: Celsius (C) : Celsius (C)
EquipmentEquipment: thermometer: thermometer
Standard EquivalentsStandard Equivalents::
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TemperatureTemperatureEstimatesEstimates
Room Temperature= 68Room Temperature= 68F = F = 2020CC
Water Freezes At: 32Water Freezes At: 32F = F = 00CC
Water Boils At: 212Water Boils At: 212F = F = 100100CC
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DensityDensity
DEFINITION: the amount of DEFINITION: the amount of mattermatter in a given in a given amount of space.amount of space.
Unit: Grams per milliliter (g/mL) and Unit: Grams per milliliter (g/mL) and Grams Grams per Centimeter cubed (g/cmper Centimeter cubed (g/cm33))
Equipment: No direct measurement can be Equipment: No direct measurement can be measured, must be calculated.measured, must be calculated.
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DensityDensityEstimatesEstimates
Pillow
Brick
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SpeedSpeedDEFINITION: the change in DEFINITION: the change in positionposition over time. over time.
Unit: meters per second (m/s), kilometers per Unit: meters per second (m/s), kilometers per hour (km/hr)hour (km/hr)
Estimate: Estimate: 1.3 m/s1.3 m/s= normal walking pace; = normal walking pace; 62 62 mi/hrmi/hr= 100 km/her= 100 km/her
Equipment: No direct measurement can be Equipment: No direct measurement can be measured, must be calculated.measured, must be calculated.
EquivalentsEquivalents