Answer:
What can one catch that is not thrown?
You cannot keep me until you have given me. What am I?
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?
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?
The dirtier I get, the whiter I am. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.