Answer:
When I live I cry if you don't kill me I'll die.
I have roots that no one sees and I am taller than trees. Up, up I go, but never do I grow. What am I?
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
Drop me and the world will shatter. You can always find me where you empty your bladder.
No matter how little or how much you use me, you change me every month.