Answer:
The faster you run the harder it is to catch me
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
Which word in the dictionary is spelled incorrectly?
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
I come with a train and go with a train and the train doesn't need me but can't go without me.
No matter how little or how much you use me, you change me every month.