text: when does a pond become a lake?  is there a difference?   this link should help i used this websites for my environmental science class when i had to answer the same question...  good luck  http://www.imagiverse.org/questions/archives/earth_science1.htm#question_11  http://www.epa.gov/glnpo/monitoring/great_minds_great_lakes/history/come_from.html   i really enjoyed helping because i learned some things myself!!  good luck http://www.state.me.us/doc/nrimc/mgs/explore/geography/#q5