Answer:
What looks back but cannot see?
What is made of wood but can't be sawed?
A precious fluid, thicker than water.
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
I climb higher when hot, But beware my rage, I’ll kill with a breath, If I can escape my cage
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.