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Learning outcome: Maritime and sea exploration are highly important for transportation of goods and people. Learn how ships can float over water due to buoyancy. Understand what is density, how it varies over objects and comprehend that density is a significant factor which determines whether an object will sink or float on a fluid. Experiment Method Description: Build and decorate your submarine model. Use a sink filled with water to tests its buoyant behavior. Alter its density using a combination of materials such us air, water and investigate whether it will float or sink. Components: Engino parts, plastic skins and paper outlines, sink with water, plastic bottle, pebbles.