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Metric System
 

Metric System

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    Metric System Metric System Presentation Transcript

    • Introduction to Matter and the Metric System 7 th Grade Physical Science Mr. Riordan
    • What is Matter?
      • Matter is all things that we can see, touch, and smell in our daily lives.
      • Matter is what the universe is made of
      • We are made of matter
      • Matter has properties.
      • A property is a characteristic of something that helps identify it, and which makes it unique.
      • Properties describe an object .
    • Properties of Matter
      • There are some properties of matter.
      • These properties are mass, weight, volume, and density .
      • Our working definition of matter is any substance that has mass and volume
    • MASS
      • Mass is the amount of matter in an object .
      • Mass is constant
      • It cannot be changed unless you add or remove matter from an object.
      • The metric units that are used to express mass are the gram (g), milligram (mg) , and the kilogram (kg).
      • The amount of space an object takes up or occupies is called its volume.
      • The metric units that are used to express volume are the liter (L), milliliter (mL) , and the cubic centimeter (cm 3 ).
      • Liters and milliliters are used to measure the volume of liquids .
      • Cubic centimeters are used to measure the volume of solids .
    • History of the Metric System
      • Developed in Lyon, France, ~1670
      • Created to make consistent units for measurement
      • Based on “powers of 10” …what does this mean?
    • The Basic Metric Units
      • Meter : base unit for length
      • Liter : base unit for volume
      • Gram : base unit for mass
    • Powers of 10
      • Prefixes in front of the base unit tell if the measurement is greater or less than the base unit.
      • Each prefix is a factor of ten .
      • This makes it easy to convert between units.
    • How big is a ….
        • Kilometer? 1000x larger then a meter
        • Meter? Height of a standard countertop
        • Centimeter? 100x smaller then a meter, the width of a dime
        • Millimeter? 1000x smaller then a meter, the thickness of a dime
    • Metric Prefixes Kilo 1000x Larger Smaller Base Units Kilo 1000 X larger Hecto 100 X larger Deka 10 X larger (no prefix) Meter Liter Gram Deci One Tenth 1/10 Centi One Hundreth 1/100 Milli One Thousanth 1/1000
    • Using a Ruler
      • What is the length of the blue arrow?
    • Using a Ruler
      • ALWAYS measure with the starting point at the “0” mark!
    • Kilometer - km
      • 1000 times larger than a meter.
      • 12 blocks less than a mile.
      • Main span of GW bridge
    • Hectameter - hm
      • 100x larger than a meter.
      • Height of Statue of Liberty from base to torch
    • Decameter - dam
      • 10 x larger than a meter
      • Length of a school bus
    • Meter - m
      • Length of a meter stick.
      • Height of a counter top
    • Decimeter - dm
      • 10x smaller than a meter.
      • Height of a can of soda.
    • Centimeter - cm
      • 100x smaller than a meter
      • ½ width of a dime
    • Millimeter - mm
      • 1000x smaller than a meter
      • The thickness of a dime
    • Micrometer - um
      • 1,000,000x smaller than a meter.
      • diameter of a bacteria cell
    • Nanometer - nm
      • 1,000,000,000x smaller than a meter.
      • Thickness of a DNA molecule.
    • Kilogram - kg
      • 1000x heavier than a gram
      • Mass of a liter of orange juice.
    • Hectogram - hg
      • 100x heavier than a gram.
      • Mass of a stick of butter.
    • Decagram - dkg
      • 10 x heavier than a gram
      • Mass of 2 nickels
    • Gram - g
      • Mass of a paper clip
    • Decigram - dg
      • 10 x lighter than a gram.
      • Mass of 10 grains of salt
    • Centigram - cg
      • 100x lighter than a gram.
      • Mass of a single grain of salt.
    • Milligram - mg
      • 1,000x lighter than a gram.
      • Mass of a mosquito
    • Microgram - ug
      • 1,000,000x lighter than a gram
      • Mass of a flour particle
    • Nanogram - ng
      • 1,000,000,000x lighter than a gram
      • Mass of a human cell.
    • Kiloliter - kL
      • 1000x larger than a liter
      • Volume of a fridge
      • 1,000,000 cm 3
    • Hectoliter - hL
      • 100x larger than a liter.
      • 100,000 cm 3
      • Volume of two kitchen trashcans
    • Decaliter - dkL
      • 10 x larger than a liter.
      • 10,000 cm 3
      • Volume of 3 gallons of milk
    • Liter - L
      • 100 cm 3
      • Volume of 3 cans of soda
    • Deciliter - dL
      • 10x smaller than a liter.
      • 100 cm 3
      • Volume of a dixie cup
    • Centiliter - cL
      • 100x smaller than a liter
      • 10 cm 3
      • 2 tablespoons of liquid
    • Milliliter - mL
      • 1000x smaller than a liter
      • 1 cm 3
      • Volume of a cube of sugar
    • Microliter - uL
      • 1,000,000x smaller than a liter
      • 0.001 cm 3
      • Crystal of table salt
    • nanoLiter - nL
      • 1,000,000,000x smaller than a liter.
      • 0.000001 cm 3