Answer:
I fill a room but take no space. What am I?
I've been around for millions of years, but I am no more than a month old. What am I?
The more holes you cover the lower I go.
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
I am not alive but I grow I don't have lungs but I need air I don't have a mouth but water kills me. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.