What statement best describes a solid?
question 12 options:
solids have definite shape and variable volume.
solids have variable shape and variable volume.
solids have a definite shape and definite volume.
solids have a variable shape and definite volume.

Solids: definite shape, definite volume
Because they are stiff and the molecules don't move around, they vibrate quickly.
Liquids: indefinite shape, definite volume
Because the shape or "fixed" area of liquids won't stay the same.
Gases: indefinite shape, indefinite volume
Because you've probably noticed, gases are set more freely, allowing molecules to move more freely than in solids and liquids. 
x) Hope I helped! Which do you think it is?

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.