Good Riddles

Question: These are the three lives of mine:
So gentle I soothe the skin,
So light I caress the sky,
So hard I crack rocks.

What am I?

Question: What am I?

Question: What goes up, lets out a load, then goes back down?

Question: What can be swallowed, but can swallow you?

Question: What's the difference between a well-dressed man on a bicycle and a poorly-dressed man on a tricycle?