Answer:
I have two body parts but am used to measure length. What am I?
What goes through a door but never goes in and never comes out?
Lovely and round, I shine with pale light. Grown in the darkness, a lady's delight. What am I?
What bone has a sense of humor?
I save lives on the ground and in the air. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.