Science
Liquids generally have a lower density than solids. But you must have observed that ice floats on water. Find out why.
Matter
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Answer
Water shows unique behaviour as it is one of the few substances that expands on freezing resulting in a decrease in its density. Therefore, the ice formed is less dense than the liquid water, causing it to float on water.
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Related Questions
(a) Tabulate the differences in the characteristics of states of matter.
(b) Comment upon the following:
rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.
Give reasons
(a) A gas fills completely the vessel in which it is kept.
(b) A gas exerts pressure on the walls of the container.
(c) A wooden table should be called a solid.
(d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expert.
Convert the following temperature to Celsius scale:
(a) 300 K
(b) 573 K
What is the physical state of water at?
(a) 250°C
(b) 100°C