# Metric

 Base unit of time
 second
 Base unit of mass
 kilogram
 Base unit of length
 meter
 Base unit of temperature
 Kelvin
 Base unit for the amount of substance
 mole
 Reference for Kilometer
 a little more than a 1/2 a mile
 Reference for Centimeter
 Reference for Millimeter
 about the thickness of a dime
 Reference for Meter
 about the distance from the floor to a doorknob
 Reference for a liter
 About the volume of a quart of milk or a 1/2 a 2L soda bottle
 Reference for a Milliliter
 Reference for a Gram
 about the mass of a large paperclip
 Reference for a Kilogram
 about the mass of a 1 liter bottle of water
 Reference for a Cubic Centimeter
 about the volume of a box (LxWxH) that contains 1 ml of a liquid
 Reference for a Milligram
 about the mass of 10 grains of salt
 Reference to relate liter and cubic cm
 1 L = cube 10 cm x 10 cm x 10 cm
 1 mL =
 1 cm3
 Standard unit for measuring mass is the:
 kilogram (not gram)
 Difference btwn mass and weight
 Mass is the amount of matter in an object (value won’t change when location changes). Weight is a measure of the gravitational pull and changes when gravity changes (ie – on the moon! You will only weigh 1/6th of what you weigh on Earth since their is only 1/6th gravity on Moon)
 Heat energy flows in this direction
 From hotter objects to colder objects
 Thermal expansion
 Most substances (not water) will expand when heated and contract when cooled.
 Two units used to measure the energy of something
 Joules ; Calories
 Prefix “deci”
 indicates 10 times smaller than the base unit
 Prefix “centi”
 indicates 100 times smaller than the base unit
 Prefix “milli”
 indicates 1000 times smaller than the base unit
 Prefix “Kilo”
 indicates 1000 times larger than the base unit
 Prefix “micro”
 indicates 1×106 (1,000,000) times smaller than the base unit
 Prefix “nano”
 indicates 1×109 (1,000,000,000) times smaller than the base unit
 Prefix “Mega”
 indicates 1×106 (1,000,000) times larger than the base unit
 Prefix “pico”
 indicates 1×1012 (1,000,000,000,000) times smaller than the base unit
 Freezing point and boiling point of water
 0 oC and 100 oC, 273 K and 373 K
 How to convert from Celsius to Kelvin
 Add 273 to the Celsius measurement
 How to convert from Kelvin to Celsius
 Subtract 273 from the Kelvin measurement
 Absolute Zero
 Bottom of the Kelvin scale, Represents no energy, A theoretical value (has never been exactly reached – very close though), 0 K
 Calorie
 Amount of heat needed to change the temperature of 1 g of water 1 degree Celsius
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