Question

why are liquid and gas called fluid​

Answer 1

gas fills its container, taking both the shape and the volume of the container. Liquids and gases are called fluids because they can be made to flow, or move. In any fluid, the molecules themselves are in constant, random motion, colliding with each other and with the walls of any container.

Answer 2

Answer:

because they have the tendency to flow freely in comparison to other forms of matter like solid