WBCS.LIVE practice question

Why does a block of ice float on the surface of liquid water?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Density of ice is more than water
  2. Density of ice is less than water
  3. Ice absorbs heat from water
  4. Surface tension of water supports it

Correct answer and explanation

Correct answer: Density of ice is less than water

Explanation: āœ… Correct Answer: B) Density of ice is less than water šŸ“š Explanation: Most substances contract and become denser when they freeze, but water is unique because it expands when it turns into ice. This expansion creates a crystalline structure with more space between molecules, making ice about 9% less dense than liquid water. According to Archimedes' Principle, this lower density allows the ice to float.