Answer:
Look into my face and I'm everybody. Scratch my back and I'm nobody.
What is eaten but not grown and was born in water but will disappear if soaked?
I am believed to be only one dimensional, and tinier than anything can be, and there are many who say that I am the basis of all that we see. What am I?
Once they sailed the sea, now they surf the web
What is it that makes tears without sorrow and takes its journey to heaven?
You use it between your head and your toes, the more it works the thinner it grows.