Water is unique because its solid phase is ____ the liquid phase.
A) denser than
B) similar to
C) less dense than

Question

Quizplus · Accepted Answer

Water is one of the very few substances which have a lower density as a solid than as a liquid. This is because of the arrangement of its molecules in the solid phase, which causes it to expand and become less dense than in the liquid phase. This unique property is why ice floats on water, and this has many important implications for life on Earth.

Water Is Unique Because Its Solid Phase Is ____ the Liquid