ocr: Can boats be made from any material? Ifyou've ever tried floating things in the bath, you'll know that some materials, such as cork, float easily while others will sink. This is because different substances have different densities. Any material will sink if it has a greater density than water. However, it is possible to use very dense materials to make boats that float. Steel, for example, is used to: make almost all of the biggest ships at sea today. People have even used concrete to build boats. STEEL-COATED SHIP WITH A LOW DENSITY - - BLOCK OF STEEL WITH IA HIGH DENSITT Steel can be used t ...