Archimedes' Principle - From Infoplease.com, an encyclopedia entry explaining the theory behind buoyancy (M,O)
Archimedes of Syracuse: The Father of Buoyancy - Includes a history of Archimedes' study of buoyancy, a hands on activity, and a group of links on the subject (O)
Pontoons - From Infoplease.com, an explanation of how pontoons are used to raise sunken ships and support bridges (Y, M, O, T)
It Floats - We don't usually stop to wonder why a big cruise ship can float as well as a feather; this activity helps to explain. (Y, M, O, T)
PBS Buoyancy Basics - An experiment from NOVA with a link to other buoyancy brainteasers (M)
Moby Dick - Literature lesson plan from DiscoverySchool.com Grades 9-12 (O)
Glaciers and Icebergs - From DiscoverySchool.com, this lesson plans explores the movement of icebergs and glaciers as well as the principle that explains why they float (M,O)
Naval Historical Center - Comprehensive government site with extensive information on naval history (Y, M, O, T)
Interactive Titanic - Click on one of the silhouettes and follow the path of an actual passenger who traveled on the Titanic. You won't know who you are or if you survive until the fateful night. (Y, M, O, T)