Answer:
I go in dry and come out wet. The longer I stay in the stronger my surroundings get.
I am commonly abbreviated to H
The more you work the more I'll eat.You keep me full I'll keep you neat.
I break down buildings, I crumble mountains but you can't see me. What am I?
You can catch me but cannot throw me. What am I?
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