1. Measurements are quantitative information. They include numbers AND units.

2.  Quantity = has magnitude, size, or amount  Quantity ≠ measurement!  Ex. The quantity, volume, is represented by measurements reported in units like teaspoons, milliliters, cubic centimeters, gallons, quarts, etc.

3.  Agreed upon measurement of a quantity Ex. The foot

4.  Scientists worldwide use the metric system of measurement  SI has 7 base units (see table 1 and KNOW these quantities, units, and abbreviations)  NEVER use commas when writing numbers (too easily confused with decimals)

5. Length (l)meter (m) Mass (m)kilogram (kg) Time (t)second (s) Temperature (T)Kelvin (K) Amt. of a substance (n)mole (mol) Electric current (I) ampere (A) Luminous intensity (I v ) candela (cd) QuantityUnit

6.  Measure of the amount of matter (stuff)  Does NOT change with location  Weight DOES change depending on gravity  I weigh less on the moon, but my mass does NOT differ from my mass on Earth.

7.  Prefixes added to base units are used to represent quantities larger or smaller than the base unit.  Ex. 1 centimeter is 1/100 th of a meter 1 cm = 0.01 m OR 1 cm = 1 X 10 -2

8.  KNOW THESE prefixes!!!!!!!  Know the abbreviation for each prefix  Know the conversion factor (example) for each prefix  Know that these prefixes can be applied to ANY base unit

9.  A ratio (fraction) expressing the equality btw two different units  Can be used to convert from one unit to the other  Ex. 4 quarters12 inches 1 dollar1 foot

10.  Express 17.5g in mg.  Express 45 km/hr in m/s.  This is called Dimensional Analysis

11.  Derived units are combinations of SI base units  AreaAl x wm 2  VolumeVl x w x hm 3  Density Dm/Vkg/m 3  Molar massMm/amtkg/mol  Molar volumeVmV/amtm 3 /mol  EnergyEforce x lengthjoule (J)

12.  The amount of space occupied by matter  Liquid volume is measured in liters (L)  1 L = 1000 cm 3  1 mL = 1 cm 3 (cubic centimeter or cc)

13.  Ratio of mass to volume  Amt of “stuff” / amt of space taken by stuff  Density = how crowded the particles of matter are  Be sure to read about density and see table 4 on page 38!!!