2. Dimensional Analysis

3.  Method of converting one unit to another  Conversion factor— ratio relationship between 2 units  Write units, BE SURE THEY CANCEL ! ! !  “Where are we starting? Where are we trying to go?”

4.  KNOW  2.54 cm = 1 inch

5. Example 1: 12 inches to miles

6. Example 2: 3000 min to days

7. Example 3: 4000 miles to inches

8. Practice ! 1) Seconds since Declaration of Independence 2) 55 years to seconds

9. Homework—remember Element Quiz!!  1) 5 weeks to minutes  2) 600 ml to quarts  3) 80000 seconds to days  4) 95 miles to meters  5) 7000 eggs to dozens  6) How many seconds have you been alive on this Earth?  ** Ponder: How fast would you need to run to outrun a cheetah? A grizzly bear?