What Am I Riddles

Question: What grows shorter as it grows older?

Question: I have mountains but no heights I have seas but no water I have forests but no trees I have North & South & East & even West, but no direction What am I?

Question: You use a knife to slice my head and weep beside me when I am dead.

What am I?

Question: You are my brother, but I am not your brother. Who am I?

Question: I can be dropped from the tallest of buildings and survive,but drop me from the smallest ship and I won't.What am I?