Good Riddles

Question: I can fly in your mind. I was not made to scare anyone, but many fear me. What am I?

Question: When you talk about it, it disappears. What is it? A. A secret B. Silence C. Time

Question: You feel me but can't touch me, you can hear me but can't see me. I move leaves in trees, you need me to live. At my highest speeds i uproot trees and mow down houses. I cause waves over the ocean. I've been around since the beginning of life. What am I?

Question: Can you make VI out of IX?

Question: Spell "Hard Water" using only 3 letters.