An object with specific gravity less than one placed in water will:

1. Specific gravity compares the object's density with water's. 2. Specific gravity is the ratio of an object's average density to the density of water. 3. A value below one means the object is less dense than water. 4. If the buoyant force is greater than the object's weight, the object will rise to the surface and float. 5. A less dense object displaces water weighing more than itself, so it floats. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_