Answer:
What is the edge of earth and bread?
In Paris but not in France the thinnest of its siblings.
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
My geometry is lost in the night to be found in daylight's break. The rigors of time have torn me to shreds, yet I stand to protect that which lies within. What am I?
The shorter I am, the bigger I am. What am I?
What is lighter than what it is made of?