Question

Which of the following sinks in water?

• A. Wooden block
• B. Piece of wax
• C. Glass marble
• D. Plastic ball

Answer 1

Answer: (C)

Glass marble

Since wood is less dense than water, wood-block floats in water, no matter how big or small the piece of wood is.

In water, the piece of wax floats because it is less dense than the water.

Glass marble is denser than water so it can sink.

A plastic ball is less dense than water so it can float on the water surface.

Hence, option C is correct.