If "road" is called "water", "water" is called "ice", "ice" is called "sugar" and "sugar" is called "bowl". Then, on what the vehicles move?
When water is cooled, it gets converted into ice by a process called P. When ice is warmed, it gets reconverted into the water in a process called Q. Identify P and Q.
What are the fumes that come out when water is added to dry ice called?