How do these lists differ?

       
List 1
symphony
amber
1837
typewriter
trick
Jerome Tropp

The words in List 2
are connected to each
other by an idea:
 
   They are all farm animals.  

List 2
cows
sheep
pigs
horses
chickens
ducks

   That connection makes them easier to remember!

  Understanding 2    arrow2.gif (272 bytes)