Answer:
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls
What can be cracked before it's used?
I am so delicate that even mentioning me breaks me. What am I?
Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers magazines and journals.
Face with a tree skin like the sea. A great beast I am. Yet vermin frightens me.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.