Answer:
This patch of land stands alone
A standard dimension for sandwiches and rulers
The part of the bird, that is not in the sky, Which can swim in the ocean and always stay dry. What is it?
Many foods can make me strong but give me water and I won't last long.
What cleans as it gets dirty only to get clean the more you use it?
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?