Answer:
I have cities without people forests without trees and oceans without water. What am I?
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I am constantly overlooked by everyone but everyone has me.
I have a head and a tail but no body. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
A little house full of meat, no door to go in and eat.