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
about the width of your fingernail
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
About 20 drops of water
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
x

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