Answer:
liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
To the Earth in less than ten minutes.
Erosion, weathering, mechanical changes, chemical changes.
Really, any interaction can change the composition of a rock whether it be done by man or through nature.
Because although they cannot see it, they can see it's influence on objects that can be seen, and it's effects.
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.