Easy Riddles and Answers

Question: What has 4 fingers and a thumb, but is not living?

Question: What is so delicate that even mentioning it breaks it?

Question: What is it that after you take away the whole, some still remains?

Question: Imagine you are swimming in the ocean and a bunch of hungry sharks surround you. How do you get out alive?

Question: I'm heavy but not backwards.

What am I?