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# Metric System

## by cjenning on Jul 29, 2008

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## Metric SystemPresentation Transcript

• The Metric System
• What is it?
• Metric system : standard system of measurement used by all scientists.
• Scientists use metric units to measure:
• length
• volume
• mass
• weight
• density
• temperature
• The method of converting measurement in one unit to measurements in another unit is known as dimensional analysis .
• Conversion factor : a fraction that always equals 1.
• thermometer Celsius temperature D=M/V density Weighing scale Newton weight Triple-beam balance Gram, kilogram, milligram mass Graduated cylinder, beaker Liter, mL, cubic centimeter volume Ruler, meter stick, yard stick meter, cm, km, light year length Tool Unit Measurement
• Length
• The basic unit of length is the meter .
• Meter (m)- your height would be measured in meters.
• Centimeter (cm): one-hundredth of a meter (to measure your textbook).
• Millimeter (mm): one-thousandth of a meter (to measure the diameter of the pupil of your eye).
• Micrometer: 1,000,000= 1 meter
• Kilometer (km): one thousand meters (to measure length of a long river).
• Light year: distance that light travels
• Volume
• Volume is the amount of space an object takes up.
• Liter (L): basic unit of volume
• Milliliter (mL): = to 1/1000 of a liter (to measure liquid in a cup).
• Cubic centimeter (cc): = to 1 milliliter (used to measure solids…..length X width X height).
• Mass
• Mass is a measure of the amount of matter in an object.
• Kilogram (kg): the basic unit of mass (to measure large objects/animals).
• Gram (g): 1/1000 of kilogram (to measure mass of a coin).
• Milligram (mg): one-thousandth of a gram.
• Weight
• Weight is a measure of the attraction between two objects due to gravity.
• Newton (N): the basic unit of weight (your weight in outer space).
• Density
• The relationship between mass & volume.
• D=M/V
• Suppose a substance has a mass of 10 grams and a volume of 10 milliliters. What is the density of the substance?
• Temperature
• Temperature is measured on the Celsius scale only.
• To convert Celsius ( C°) to Fahrenheit (F °):
• Multiply by 9
• Divide by 5