Answer:
Without me everyone would lose their head.
I welcome the day with a show of light. I steathily came here in the night. I bathe the earthy stuff at dawn but by noon, I'm gone. What am I?
The Titanic is still here. What am I?
What goes up but never comes down?
I have a lot to say but can't be heard because I can't speak one single word. What am I?
No matter how little or how much you use me, you change me every month.