Answer:
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
Why is it so easy to weigh fish?
What is the musical part of a turkey?
Lovely and round I shine with pale light grown in the darkness a lady's delight.
A young man wants to have me but when he has me, he no longer wants me. What am I?
I am always hungry, I must always be fed. The finger I lick will soon turn red. What am I?