The Green Knight's riddles

1. A knight who was outside in the rain without his helmet or hat or any protection didn’t get a single hair on his head wet. Why?
3. If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?
4. I have lakes with no water, mountains with no stone and cities with no buildings. What am I?
7. What goes up and down but doesn’t move?
8. It belongs to you, but other people use it more than you do. What is it?
9. What is always in front of you but can’t be seen?
11. I’m tall when I’m young, and I’m short when I’m old. What am I?
13. What has many needles, but doesn’t sew?
15. What has legs, but doesn’t walk?
16. What is so fragile that saying its name breaks it?
18. You must break me to use me. Who Am I?

1. I shave every day, but my beard stays the same. What am I?
2. What can you break, even if you never pick it up or touch it?
5. The person who makes it has no need of it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?
6. I am always hungry and will die if not fed, but whatever I touch will soon turn red. What am I?
8. There’s a one-story castle where everything is grey. Grey walls, grey doors, grey furniture. What color are the stairs?
10. What goes through cities and fields, but never moves?
12. What can you catch, but not throw?
13. What has many teeth, but can’t bite?
14. What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
17. The poor have it, the rich want it, if you drink it, you die, if you eat it, you die, if you breathe it, you die.
19. What has a thumb and four fingers, but is not a hand?