Question

Which of the following factors will decide whether an object will float or sink?

• A. Mass
• B. Weight
• C. Density
• D. Volume

Answer 1

The correct option is C Density

Even though some items seem very light (things like a coin or a button), they still sink in the water. Some objects that might seem sort of heavy (like a wooden block) probably float. This is because whether an object sinks or floats in water doesn't just depend on its weight or size. It also depends on its density.

Density is a measure of mass per unit volume. All things are made up of tiny particles called molecules. If the molecules inside an object are close together, the item is dense. If the molecules are farther away from each other, the object is less dense, or less solid. An example of a very dense item is a coin and a cork is less dense.

A coin, plastic, or button sink in water because the materials they are made of is denser than water. A cork and piece of wood float because those materials have less density than water.

All the objects that are less denser than water floats and objects that are denser than water, sinks in it.