Answer:
I go up and down at the same time. Up towards to sky and down towards the ground
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
kings and queens may cling to power and the jesters may have their call. I am the most common but I can rule them all.
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
Before Google, we actually had to physically look things up in this building full of knowledge.