Answer:
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
What goes up when rain comes down?
A sphere has three, a circle has two, and a point has zero. What is it?
A job that involves sitting in a highchair, wearing a black gown and smacking things with a mallet
What is between heaven and earth?
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?