Answer:
What's orange and sounds like a parrot?
When you take away the whole from me there is always some left.
You turn me over after you have traveled far. What am I?
When you need me, you must find me. When you find me, you no longer need me. What am I?
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I stay where I am when I go off. What am I?