What Am I Riddles

Question: What has a head yet it never weeps, has a bed but never sleeps, can run but can not walks, and has a bank but not a cent to its name?

Question: The more it dries, the wetter it becomes.

What is it?

Question: Give me food, and I will live. Give me water, and I will die. What am I?

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

What am I?

Question: I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter.

What am I?