explain the following,using the idea of molecules where possible :

A.lakes are more likely to freeze than the sea

http://answers.yahoo.com/question/index?qid=20091025014443AAGePa2

Lake Erie, the smallest of the Great Lakes, freezes first.

Beside the comment in the link, there is much stored heat in a body of water. By this measure, the sea has much more heat to release before it freezes.