What Am I Riddles

Question: A wise man once called me "the moist star", and in an infinite sea, I can be seen afar. I create motions in which you may ride on for sport, and am also used as a scientist's port. What am I?

Question: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I?

Question: When it is alive we sing, when it is dead we clap our hands. What is it?

Question: And, here I am! Between sea and land! Connecting one to another Bringing two friends together! What am I?

Question: Who gets paid when they drive away their customers?