A significant part of aeronautical science is a branch of dynamics called aerodynamics, which deals with the motion of air and the way that it interacts with objects in motion, such as an aircraft.
When you pour a liquid from one container to another, the liquid takes the shape of the container. The volume of the liquid is the same. The properties that solids and liquids share are that they both have definite volume.
The molecules in solids are close together and do not move about as much as those of gases and liquids. Solids have a definite shape and size or volume. States of matter change according to the amount of heat applied to them or taken from them. Solids change to liquids with more heat added.