EVERYDAY SCIENCE

Detailed explanation-1: -Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.

Detailed explanation-2: -If the reference material is water, then a substance with a relative density (or specific gravity) less than 1 will float in water. For example, an ice cube, with a relative density of about 0.91, will float. A substance with a relative density greater than 1 will sink.

Detailed explanation-3: -Object sinks when the weight of the water displaced by it is less than the weight of the object. This proves out to be equivalent to relative density of the object wrt water being greater than one.

Detailed explanation-4: -The positioning of molecules affects the density of an object. Objects with tightly packed molecules are more dense than those where the molecules are spread out. Density plays a part in why some things float and some sink. Objects that are more dense than water sink and those less dense float.